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Merge pull request #202 from scheibelp/features/unittest-xml-output-nose

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Features/unittest xml output nose
This commit is contained in:
Todd Gamblin 2016-01-17 19:14:49 -08:00
commit c1e57e49ae
56 changed files with 13905 additions and 30 deletions
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8
bin/spack
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@ -41,6 +41,14 @@ sys.path.insert(0, SPACK_LIB_PATH)
SPACK_EXTERNAL_LIBS = os.path.join(SPACK_LIB_PATH, "external")
sys.path.insert(0, SPACK_EXTERNAL_LIBS)
import warnings
# Avoid warnings when nose is installed with the python exe being used to run
# spack. Note this must be done after Spack's external libs directory is added
# to sys.path.
with warnings.catch_warnings():
warnings.filterwarnings("ignore", ".*nose was already imported")
import nose
# Quick and dirty check to clean orphaned .pyc files left over from
# previous revisions. These files were present in earlier versions of
# Spack, were removed, but shadow system modules that Spack still

504
lib/spack/external/nose/LICENSE vendored Normal file
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@ -0,0 +1,504 @@
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15
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@ -0,0 +1,15 @@
from nose.core import collector, main, run, run_exit, runmodule
# backwards compatibility
from nose.exc import SkipTest, DeprecatedTest
from nose.tools import with_setup
__author__ = 'Jason Pellerin'
__versioninfo__ = (1, 3, 7)
__version__ = '.'.join(map(str, __versioninfo__))
__all__ = [
'main', 'run', 'run_exit', 'runmodule', 'with_setup',
'SkipTest', 'DeprecatedTest', 'collector'
]

8
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@ -0,0 +1,8 @@
import sys
from nose.core import run_exit
if sys.argv[0].endswith('__main__.py'):
sys.argv[0] = '%s -m nose' % sys.executable
run_exit()

397
lib/spack/external/nose/case.py vendored Normal file
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@ -0,0 +1,397 @@
"""nose unittest.TestCase subclasses. It is not necessary to subclass these
classes when writing tests; they are used internally by nose.loader.TestLoader
to create test cases from test functions and methods in test classes.
"""
import logging
import sys
import unittest
from inspect import isfunction
from nose.config import Config
from nose.failure import Failure # for backwards compatibility
from nose.util import resolve_name, test_address, try_run
log = logging.getLogger(__name__)
__all__ = ['Test']
class Test(unittest.TestCase):
"""The universal test case wrapper.
When a plugin sees a test, it will always see an instance of this
class. To access the actual test case that will be run, access the
test property of the nose.case.Test instance.
"""
__test__ = False # do not collect
def __init__(self, test, config=None, resultProxy=None):
# sanity check
if not callable(test):
raise TypeError("nose.case.Test called with argument %r that "
"is not callable. A callable is required."
% test)
self.test = test
if config is None:
config = Config()
self.config = config
self.tbinfo = None
self.capturedOutput = None
self.resultProxy = resultProxy
self.plugins = config.plugins
self.passed = None
unittest.TestCase.__init__(self)
def __call__(self, *arg, **kwarg):
return self.run(*arg, **kwarg)
def __str__(self):
name = self.plugins.testName(self)
if name is not None:
return name
return str(self.test)
def __repr__(self):
return "Test(%r)" % self.test
def afterTest(self, result):
"""Called after test is complete (after result.stopTest)
"""
try:
afterTest = result.afterTest
except AttributeError:
pass
else:
afterTest(self.test)
def beforeTest(self, result):
"""Called before test is run (before result.startTest)
"""
try:
beforeTest = result.beforeTest
except AttributeError:
pass
else:
beforeTest(self.test)
def exc_info(self):
"""Extract exception info.
"""
exc, exv, tb = sys.exc_info()
return (exc, exv, tb)
def id(self):
"""Get a short(er) description of the test
"""
return self.test.id()
def address(self):
"""Return a round-trip name for this test, a name that can be
fed back as input to loadTestByName and (assuming the same
plugin configuration) result in the loading of this test.
"""
if hasattr(self.test, 'address'):
return self.test.address()
else:
# not a nose case
return test_address(self.test)
def _context(self):
try:
return self.test.context
except AttributeError:
pass
try:
return self.test.__class__
except AttributeError:
pass
try:
return resolve_name(self.test.__module__)
except AttributeError:
pass
return None
context = property(_context, None, None,
"""Get the context object of this test (if any).""")
def run(self, result):
"""Modified run for the test wrapper.
From here we don't call result.startTest or stopTest or
addSuccess. The wrapper calls addError/addFailure only if its
own setup or teardown fails, or running the wrapped test fails
(eg, if the wrapped "test" is not callable).
Two additional methods are called, beforeTest and
afterTest. These give plugins a chance to modify the wrapped
test before it is called and do cleanup after it is
called. They are called unconditionally.
"""
if self.resultProxy:
result = self.resultProxy(result, self)
try:
try:
self.beforeTest(result)
self.runTest(result)
except KeyboardInterrupt:
raise
except:
err = sys.exc_info()
result.addError(self, err)
finally:
self.afterTest(result)
def runTest(self, result):
"""Run the test. Plugins may alter the test by returning a
value from prepareTestCase. The value must be callable and
must accept one argument, the result instance.
"""
test = self.test
plug_test = self.config.plugins.prepareTestCase(self)
if plug_test is not None:
test = plug_test
test(result)
def shortDescription(self):
desc = self.plugins.describeTest(self)
if desc is not None:
return desc
# work around bug in unittest.TestCase.shortDescription
# with multiline docstrings.
test = self.test
try:
test._testMethodDoc = test._testMethodDoc.strip()# 2.5
except AttributeError:
try:
# 2.4 and earlier
test._TestCase__testMethodDoc = \
test._TestCase__testMethodDoc.strip()
except AttributeError:
pass
# 2.7 compat: shortDescription() always returns something
# which is a change from 2.6 and below, and breaks the
# testName plugin call.
try:
desc = self.test.shortDescription()
except Exception:
# this is probably caused by a problem in test.__str__() and is
# only triggered by python 3.1's unittest!
pass
try:
if desc == str(self.test):
return
except Exception:
# If str() triggers an exception then ignore it.
# see issue 422
pass
return desc
class TestBase(unittest.TestCase):
"""Common functionality for FunctionTestCase and MethodTestCase.
"""
__test__ = False # do not collect
def id(self):
return str(self)
def runTest(self):
self.test(*self.arg)
def shortDescription(self):
if hasattr(self.test, 'description'):
return self.test.description
func, arg = self._descriptors()
doc = getattr(func, '__doc__', None)
if not doc:
doc = str(self)
return doc.strip().split("\n")[0].strip()
class FunctionTestCase(TestBase):
"""TestCase wrapper for test functions.
Don't use this class directly; it is used internally in nose to
create test cases for test functions.
"""
__test__ = False # do not collect
def __init__(self, test, setUp=None, tearDown=None, arg=tuple(),
descriptor=None):
"""Initialize the MethodTestCase.
Required argument:
* test -- the test function to call.
Optional arguments:
* setUp -- function to run at setup.
* tearDown -- function to run at teardown.
* arg -- arguments to pass to the test function. This is to support
generator functions that yield arguments.
* descriptor -- the function, other than the test, that should be used
to construct the test name. This is to support generator functions.
"""
self.test = test
self.setUpFunc = setUp
self.tearDownFunc = tearDown
self.arg = arg
self.descriptor = descriptor
TestBase.__init__(self)
def address(self):
"""Return a round-trip name for this test, a name that can be
fed back as input to loadTestByName and (assuming the same
plugin configuration) result in the loading of this test.
"""
if self.descriptor is not None:
return test_address(self.descriptor)
else:
return test_address(self.test)
def _context(self):
return resolve_name(self.test.__module__)
context = property(_context, None, None,
"""Get context (module) of this test""")
def setUp(self):
"""Run any setup function attached to the test function
"""
if self.setUpFunc:
self.setUpFunc()
else:
names = ('setup', 'setUp', 'setUpFunc')
try_run(self.test, names)
def tearDown(self):
"""Run any teardown function attached to the test function
"""
if self.tearDownFunc:
self.tearDownFunc()
else:
names = ('teardown', 'tearDown', 'tearDownFunc')
try_run(self.test, names)
def __str__(self):
func, arg = self._descriptors()
if hasattr(func, 'compat_func_name'):
name = func.compat_func_name
else:
name = func.__name__
name = "%s.%s" % (func.__module__, name)
if arg:
name = "%s%s" % (name, arg)
# FIXME need to include the full dir path to disambiguate
# in cases where test module of the same name was seen in
# another directory (old fromDirectory)
return name
__repr__ = __str__
def _descriptors(self):
"""Get the descriptors of the test function: the function and
arguments that will be used to construct the test name. In
most cases, this is the function itself and no arguments. For
tests generated by generator functions, the original
(generator) function and args passed to the generated function
are returned.
"""
if self.descriptor:
return self.descriptor, self.arg
else:
return self.test, self.arg
class MethodTestCase(TestBase):
"""Test case wrapper for test methods.
Don't use this class directly; it is used internally in nose to
create test cases for test methods.
"""
__test__ = False # do not collect
def __init__(self, method, test=None, arg=tuple(), descriptor=None):
"""Initialize the MethodTestCase.
Required argument:
* method -- the method to call, may be bound or unbound. In either
case, a new instance of the method's class will be instantiated to
make the call. Note: In Python 3.x, if using an unbound method, you
must wrap it using pyversion.unbound_method.
Optional arguments:
* test -- the test function to call. If this is passed, it will be
called instead of getting a new bound method of the same name as the
desired method from the test instance. This is to support generator
methods that yield inline functions.
* arg -- arguments to pass to the test function. This is to support
generator methods that yield arguments.
* descriptor -- the function, other than the test, that should be used
to construct the test name. This is to support generator methods.
"""
self.method = method
self.test = test
self.arg = arg
self.descriptor = descriptor
if isfunction(method):
raise ValueError("Unbound methods must be wrapped using pyversion.unbound_method before passing to MethodTestCase")
self.cls = method.im_class
self.inst = self.cls()
if self.test is None:
method_name = self.method.__name__
self.test = getattr(self.inst, method_name)
TestBase.__init__(self)
def __str__(self):
func, arg = self._descriptors()
if hasattr(func, 'compat_func_name'):
name = func.compat_func_name
else:
name = func.__name__
name = "%s.%s.%s" % (self.cls.__module__,
self.cls.__name__,
name)
if arg:
name = "%s%s" % (name, arg)
return name
__repr__ = __str__
def address(self):
"""Return a round-trip name for this test, a name that can be
fed back as input to loadTestByName and (assuming the same
plugin configuration) result in the loading of this test.
"""
if self.descriptor is not None:
return test_address(self.descriptor)
else:
return test_address(self.method)
def _context(self):
return self.cls
context = property(_context, None, None,
"""Get context (class) of this test""")
def setUp(self):
try_run(self.inst, ('setup', 'setUp'))
def tearDown(self):
try_run(self.inst, ('teardown', 'tearDown'))
def _descriptors(self):
"""Get the descriptors of the test method: the method and
arguments that will be used to construct the test name. In
most cases, this is the method itself and no arguments. For
tests generated by generator methods, the original
(generator) method and args passed to the generated method
or function are returned.
"""
if self.descriptor:
return self.descriptor, self.arg
else:
return self.method, self.arg

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"""
nosetests setuptools command
----------------------------
The easiest way to run tests with nose is to use the `nosetests` setuptools
command::
python setup.py nosetests
This command has one *major* benefit over the standard `test` command: *all
nose plugins are supported*.
To configure the `nosetests` command, add a [nosetests] section to your
setup.cfg. The [nosetests] section can contain any command line arguments that
nosetests supports. The differences between issuing an option on the command
line and adding it to setup.cfg are:
* In setup.cfg, the -- prefix must be excluded
* In setup.cfg, command line flags that take no arguments must be given an
argument flag (1, T or TRUE for active, 0, F or FALSE for inactive)
Here's an example [nosetests] setup.cfg section::
[nosetests]
verbosity=1
detailed-errors=1
with-coverage=1
cover-package=nose
debug=nose.loader
pdb=1
pdb-failures=1
If you commonly run nosetests with a large number of options, using
the nosetests setuptools command and configuring with setup.cfg can
make running your tests much less tedious. (Note that the same options
and format supported in setup.cfg are supported in all other config
files, and the nosetests script will also load config files.)
Another reason to run tests with the command is that the command will
install packages listed in your `tests_require`, as well as doing a
complete build of your package before running tests. For packages with
dependencies or that build C extensions, using the setuptools command
can be more convenient than building by hand and running the nosetests
script.
Bootstrapping
-------------
If you are distributing your project and want users to be able to run tests
without having to install nose themselves, add nose to the setup_requires
section of your setup()::
setup(
# ...
setup_requires=['nose>=1.0']
)
This will direct setuptools to download and activate nose during the setup
process, making the ``nosetests`` command available.
"""
try:
from setuptools import Command
except ImportError:
Command = nosetests = None
else:
from nose.config import Config, option_blacklist, user_config_files, \
flag, _bool
from nose.core import TestProgram
from nose.plugins import DefaultPluginManager
def get_user_options(parser):
"""convert a optparse option list into a distutils option tuple list"""
opt_list = []
for opt in parser.option_list:
if opt._long_opts[0][2:] in option_blacklist:
continue
long_name = opt._long_opts[0][2:]
if opt.action not in ('store_true', 'store_false'):
long_name = long_name + "="
short_name = None
if opt._short_opts:
short_name = opt._short_opts[0][1:]
opt_list.append((long_name, short_name, opt.help or ""))
return opt_list
class nosetests(Command):
description = "Run unit tests using nosetests"
__config = Config(files=user_config_files(),
plugins=DefaultPluginManager())
__parser = __config.getParser()
user_options = get_user_options(__parser)
def initialize_options(self):
"""create the member variables, but change hyphens to
underscores
"""
self.option_to_cmds = {}
for opt in self.__parser.option_list:
cmd_name = opt._long_opts[0][2:]
option_name = cmd_name.replace('-', '_')
self.option_to_cmds[option_name] = cmd_name
setattr(self, option_name, None)
self.attr = None
def finalize_options(self):
"""nothing to do here"""
pass
def run(self):
"""ensure tests are capable of being run, then
run nose.main with a reconstructed argument list"""
if getattr(self.distribution, 'use_2to3', False):
# If we run 2to3 we can not do this inplace:
# Ensure metadata is up-to-date
build_py = self.get_finalized_command('build_py')
build_py.inplace = 0
build_py.run()
bpy_cmd = self.get_finalized_command("build_py")
build_path = bpy_cmd.build_lib
# Build extensions
egg_info = self.get_finalized_command('egg_info')
egg_info.egg_base = build_path
egg_info.run()
build_ext = self.get_finalized_command('build_ext')
build_ext.inplace = 0
build_ext.run()
else:
self.run_command('egg_info')
# Build extensions in-place
build_ext = self.get_finalized_command('build_ext')
build_ext.inplace = 1
build_ext.run()
if self.distribution.install_requires:
self.distribution.fetch_build_eggs(
self.distribution.install_requires)
if self.distribution.tests_require:
self.distribution.fetch_build_eggs(
self.distribution.tests_require)
ei_cmd = self.get_finalized_command("egg_info")
argv = ['nosetests', '--where', ei_cmd.egg_base]
for (option_name, cmd_name) in self.option_to_cmds.items():
if option_name in option_blacklist:
continue
value = getattr(self, option_name)
if value is not None:
argv.extend(
self.cfgToArg(option_name.replace('_', '-'), value))
TestProgram(argv=argv, config=self.__config)
def cfgToArg(self, optname, value):
argv = []
long_optname = '--' + optname
opt = self.__parser.get_option(long_optname)
if opt.action in ('store_true', 'store_false'):
if not flag(value):
raise ValueError("Invalid value '%s' for '%s'" % (
value, optname))
if _bool(value):
argv.append(long_optname)
else:
argv.extend([long_optname, value])
return argv

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import logging
import optparse
import os
import re
import sys
import ConfigParser
from optparse import OptionParser
from nose.util import absdir, tolist
from nose.plugins.manager import NoPlugins
from warnings import warn, filterwarnings
log = logging.getLogger(__name__)
# not allowed in config files
option_blacklist = ['help', 'verbose']
config_files = [
# Linux users will prefer this
"~/.noserc",
# Windows users will prefer this
"~/nose.cfg"
]
# plaforms on which the exe check defaults to off
# Windows and IronPython
exe_allowed_platforms = ('win32', 'cli')
filterwarnings("always", category=DeprecationWarning,
module=r'(.*\.)?nose\.config')
class NoSuchOptionError(Exception):
def __init__(self, name):
Exception.__init__(self, name)
self.name = name
class ConfigError(Exception):
pass
class ConfiguredDefaultsOptionParser(object):
"""
Handler for options from commandline and config files.
"""
def __init__(self, parser, config_section, error=None, file_error=None):
self._parser = parser
self._config_section = config_section
if error is None:
error = self._parser.error
self._error = error
if file_error is None:
file_error = lambda msg, **kw: error(msg)
self._file_error = file_error
def _configTuples(self, cfg, filename):
config = []
if self._config_section in cfg.sections():
for name, value in cfg.items(self._config_section):
config.append((name, value, filename))
return config
def _readFromFilenames(self, filenames):
config = []
for filename in filenames:
cfg = ConfigParser.RawConfigParser()
try:
cfg.read(filename)
except ConfigParser.Error, exc:
raise ConfigError("Error reading config file %r: %s" %
(filename, str(exc)))
config.extend(self._configTuples(cfg, filename))
return config
def _readFromFileObject(self, fh):
cfg = ConfigParser.RawConfigParser()
try:
filename = fh.name
except AttributeError:
filename = '<???>'
try:
cfg.readfp(fh)
except ConfigParser.Error, exc:
raise ConfigError("Error reading config file %r: %s" %
(filename, str(exc)))
return self._configTuples(cfg, filename)
def _readConfiguration(self, config_files):
try:
config_files.readline
except AttributeError:
filename_or_filenames = config_files
if isinstance(filename_or_filenames, basestring):
filenames = [filename_or_filenames]
else:
filenames = filename_or_filenames
config = self._readFromFilenames(filenames)
else:
fh = config_files
config = self._readFromFileObject(fh)
return config
def _processConfigValue(self, name, value, values, parser):
opt_str = '--' + name
option = parser.get_option(opt_str)
if option is None:
raise NoSuchOptionError(name)
else:
option.process(opt_str, value, values, parser)
def _applyConfigurationToValues(self, parser, config, values):
for name, value, filename in config:
if name in option_blacklist:
continue
try:
self._processConfigValue(name, value, values, parser)
except NoSuchOptionError, exc:
self._file_error(
"Error reading config file %r: "
"no such option %r" % (filename, exc.name),
name=name, filename=filename)
except optparse.OptionValueError, exc:
msg = str(exc).replace('--' + name, repr(name), 1)
self._file_error("Error reading config file %r: "
"%s" % (filename, msg),
name=name, filename=filename)
def parseArgsAndConfigFiles(self, args, config_files):
values = self._parser.get_default_values()
try:
config = self._readConfiguration(config_files)
except ConfigError, exc:
self._error(str(exc))
else:
try:
self._applyConfigurationToValues(self._parser, config, values)
except ConfigError, exc:
self._error(str(exc))
return self._parser.parse_args(args, values)
class Config(object):
"""nose configuration.
Instances of Config are used throughout nose to configure
behavior, including plugin lists. Here are the default values for
all config keys::
self.env = env = kw.pop('env', {})
self.args = ()
self.testMatch = re.compile(r'(?:^|[\\b_\\.%s-])[Tt]est' % os.sep)
self.addPaths = not env.get('NOSE_NOPATH', False)
self.configSection = 'nosetests'
self.debug = env.get('NOSE_DEBUG')
self.debugLog = env.get('NOSE_DEBUG_LOG')
self.exclude = None
self.getTestCaseNamesCompat = False
self.includeExe = env.get('NOSE_INCLUDE_EXE',
sys.platform in exe_allowed_platforms)
self.ignoreFiles = (re.compile(r'^\.'),
re.compile(r'^_'),
re.compile(r'^setup\.py$')
)
self.include = None
self.loggingConfig = None
self.logStream = sys.stderr
self.options = NoOptions()
self.parser = None
self.plugins = NoPlugins()
self.srcDirs = ('lib', 'src')
self.runOnInit = True
self.stopOnError = env.get('NOSE_STOP', False)
self.stream = sys.stderr
self.testNames = ()
self.verbosity = int(env.get('NOSE_VERBOSE', 1))
self.where = ()
self.py3where = ()
self.workingDir = None
"""
def __init__(self, **kw):
self.env = env = kw.pop('env', {})
self.args = ()
self.testMatchPat = env.get('NOSE_TESTMATCH',
r'(?:^|[\b_\.%s-])[Tt]est' % os.sep)
self.testMatch = re.compile(self.testMatchPat)
self.addPaths = not env.get('NOSE_NOPATH', False)
self.configSection = 'nosetests'
self.debug = env.get('NOSE_DEBUG')
self.debugLog = env.get('NOSE_DEBUG_LOG')
self.exclude = None
self.getTestCaseNamesCompat = False
self.includeExe = env.get('NOSE_INCLUDE_EXE',
sys.platform in exe_allowed_platforms)
self.ignoreFilesDefaultStrings = [r'^\.',
r'^_',
r'^setup\.py$',
]
self.ignoreFiles = map(re.compile, self.ignoreFilesDefaultStrings)
self.include = None
self.loggingConfig = None
self.logStream = sys.stderr
self.options = NoOptions()
self.parser = None
self.plugins = NoPlugins()
self.srcDirs = ('lib', 'src')
self.runOnInit = True
self.stopOnError = env.get('NOSE_STOP', False)
self.stream = sys.stderr
self.testNames = []
self.verbosity = int(env.get('NOSE_VERBOSE', 1))
self.where = ()
self.py3where = ()
self.workingDir = os.getcwd()
self.traverseNamespace = False
self.firstPackageWins = False
self.parserClass = OptionParser
self.worker = False
self._default = self.__dict__.copy()
self.update(kw)
self._orig = self.__dict__.copy()
def __getstate__(self):
state = self.__dict__.copy()
del state['stream']
del state['_orig']
del state['_default']
del state['env']
del state['logStream']
# FIXME remove plugins, have only plugin manager class
state['plugins'] = self.plugins.__class__
return state
def __setstate__(self, state):
plugincls = state.pop('plugins')
self.update(state)
self.worker = True
# FIXME won't work for static plugin lists
self.plugins = plugincls()
self.plugins.loadPlugins()
# needed so .can_configure gets set appropriately
dummy_parser = self.parserClass()
self.plugins.addOptions(dummy_parser, {})
self.plugins.configure(self.options, self)
def __repr__(self):
d = self.__dict__.copy()
# don't expose env, could include sensitive info
d['env'] = {}
keys = [ k for k in d.keys()
if not k.startswith('_') ]
keys.sort()
return "Config(%s)" % ', '.join([ '%s=%r' % (k, d[k])
for k in keys ])
__str__ = __repr__
def _parseArgs(self, argv, cfg_files):
def warn_sometimes(msg, name=None, filename=None):
if (hasattr(self.plugins, 'excludedOption') and
self.plugins.excludedOption(name)):
msg = ("Option %r in config file %r ignored: "
"excluded by runtime environment" %
(name, filename))
warn(msg, RuntimeWarning)
else:
raise ConfigError(msg)
parser = ConfiguredDefaultsOptionParser(
self.getParser(), self.configSection, file_error=warn_sometimes)
return parser.parseArgsAndConfigFiles(argv[1:], cfg_files)
def configure(self, argv=None, doc=None):
"""Configure the nose running environment. Execute configure before
collecting tests with nose.TestCollector to enable output capture and
other features.
"""
env = self.env
if argv is None:
argv = sys.argv
cfg_files = getattr(self, 'files', [])
options, args = self._parseArgs(argv, cfg_files)
# If -c --config has been specified on command line,
# load those config files and reparse
if getattr(options, 'files', []):
options, args = self._parseArgs(argv, options.files)
self.options = options
if args:
self.testNames = args
if options.testNames is not None:
self.testNames.extend(tolist(options.testNames))
if options.py3where is not None:
if sys.version_info >= (3,):
options.where = options.py3where
# `where` is an append action, so it can't have a default value
# in the parser, or that default will always be in the list
if not options.where:
options.where = env.get('NOSE_WHERE', None)
# include and exclude also
if not options.ignoreFiles:
options.ignoreFiles = env.get('NOSE_IGNORE_FILES', [])
if not options.include:
options.include = env.get('NOSE_INCLUDE', [])
if not options.exclude:
options.exclude = env.get('NOSE_EXCLUDE', [])
self.addPaths = options.addPaths
self.stopOnError = options.stopOnError
self.verbosity = options.verbosity
self.includeExe = options.includeExe
self.traverseNamespace = options.traverseNamespace
self.debug = options.debug
self.debugLog = options.debugLog
self.loggingConfig = options.loggingConfig
self.firstPackageWins = options.firstPackageWins
self.configureLogging()
if not options.byteCompile:
sys.dont_write_bytecode = True
if options.where is not None:
self.configureWhere(options.where)
if options.testMatch:
self.testMatch = re.compile(options.testMatch)
if options.ignoreFiles:
self.ignoreFiles = map(re.compile, tolist(options.ignoreFiles))
log.info("Ignoring files matching %s", options.ignoreFiles)
else:
log.info("Ignoring files matching %s", self.ignoreFilesDefaultStrings)
if options.include:
self.include = map(re.compile, tolist(options.include))
log.info("Including tests matching %s", options.include)
if options.exclude:
self.exclude = map(re.compile, tolist(options.exclude))
log.info("Excluding tests matching %s", options.exclude)
# When listing plugins we don't want to run them
if not options.showPlugins:
self.plugins.configure(options, self)
self.plugins.begin()
def configureLogging(self):
"""Configure logging for nose, or optionally other packages. Any logger
name may be set with the debug option, and that logger will be set to
debug level and be assigned the same handler as the nose loggers, unless
it already has a handler.
"""
if self.loggingConfig:
from logging.config import fileConfig
fileConfig(self.loggingConfig)
return
format = logging.Formatter('%(name)s: %(levelname)s: %(message)s')
if self.debugLog:
handler = logging.FileHandler(self.debugLog)
else:
handler = logging.StreamHandler(self.logStream)
handler.setFormatter(format)
logger = logging.getLogger('nose')
logger.propagate = 0
# only add our default handler if there isn't already one there
# this avoids annoying duplicate log messages.
found = False
if self.debugLog:
debugLogAbsPath = os.path.abspath(self.debugLog)
for h in logger.handlers:
if type(h) == logging.FileHandler and \
h.baseFilename == debugLogAbsPath:
found = True
else:
for h in logger.handlers:
if type(h) == logging.StreamHandler and \
h.stream == self.logStream:
found = True
if not found:
logger.addHandler(handler)
# default level
lvl = logging.WARNING
if self.verbosity >= 5:
lvl = 0
elif self.verbosity >= 4:
lvl = logging.DEBUG
elif self.verbosity >= 3:
lvl = logging.INFO
logger.setLevel(lvl)
# individual overrides
if self.debug:
# no blanks
debug_loggers = [ name for name in self.debug.split(',')
if name ]
for logger_name in debug_loggers:
l = logging.getLogger(logger_name)
l.setLevel(logging.DEBUG)
if not l.handlers and not logger_name.startswith('nose'):
l.addHandler(handler)
def configureWhere(self, where):
"""Configure the working directory or directories for the test run.
"""
from nose.importer import add_path
self.workingDir = None
where = tolist(where)
warned = False
for path in where:
if not self.workingDir:
abs_path = absdir(path)
if abs_path is None:
raise ValueError("Working directory '%s' not found, or "
"not a directory" % path)
log.info("Set working dir to %s", abs_path)
self.workingDir = abs_path
if self.addPaths and \
os.path.exists(os.path.join(abs_path, '__init__.py')):
log.info("Working directory %s is a package; "
"adding to sys.path" % abs_path)
add_path(abs_path)
continue
if not warned:
warn("Use of multiple -w arguments is deprecated and "
"support may be removed in a future release. You can "
"get the same behavior by passing directories without "
"the -w argument on the command line, or by using the "
"--tests argument in a configuration file.",
DeprecationWarning)
warned = True
self.testNames.append(path)
def default(self):
"""Reset all config values to defaults.
"""
self.__dict__.update(self._default)
def getParser(self, doc=None):
"""Get the command line option parser.
"""
if self.parser:
return self.parser
env = self.env
parser = self.parserClass(doc)
parser.add_option(
"-V","--version", action="store_true",
dest="version", default=False,
help="Output nose version and exit")
parser.add_option(
"-p", "--plugins", action="store_true",
dest="showPlugins", default=False,
help="Output list of available plugins and exit. Combine with "
"higher verbosity for greater detail")
parser.add_option(
"-v", "--verbose",
action="count", dest="verbosity",
default=self.verbosity,
help="Be more verbose. [NOSE_VERBOSE]")
parser.add_option(
"--verbosity", action="store", dest="verbosity",
metavar='VERBOSITY',
type="int", help="Set verbosity; --verbosity=2 is "
"the same as -v")
parser.add_option(
"-q", "--quiet", action="store_const", const=0, dest="verbosity",
help="Be less verbose")
parser.add_option(
"-c", "--config", action="append", dest="files",
metavar="FILES",
help="Load configuration from config file(s). May be specified "
"multiple times; in that case, all config files will be "
"loaded and combined")
parser.add_option(
"-w", "--where", action="append", dest="where",
metavar="WHERE",
help="Look for tests in this directory. "
"May be specified multiple times. The first directory passed "
"will be used as the working directory, in place of the current "
"working directory, which is the default. Others will be added "
"to the list of tests to execute. [NOSE_WHERE]"
)
parser.add_option(
"--py3where", action="append", dest="py3where",
metavar="PY3WHERE",
help="Look for tests in this directory under Python 3.x. "
"Functions the same as 'where', but only applies if running under "
"Python 3.x or above. Note that, if present under 3.x, this "
"option completely replaces any directories specified with "
"'where', so the 'where' option becomes ineffective. "
"[NOSE_PY3WHERE]"
)
parser.add_option(
"-m", "--match", "--testmatch", action="store",
dest="testMatch", metavar="REGEX",
help="Files, directories, function names, and class names "
"that match this regular expression are considered tests. "
"Default: %s [NOSE_TESTMATCH]" % self.testMatchPat,
default=self.testMatchPat)
parser.add_option(
"--tests", action="store", dest="testNames", default=None,
metavar='NAMES',
help="Run these tests (comma-separated list). This argument is "
"useful mainly from configuration files; on the command line, "
"just pass the tests to run as additional arguments with no "
"switch.")
parser.add_option(
"-l", "--debug", action="store",
dest="debug", default=self.debug,
help="Activate debug logging for one or more systems. "
"Available debug loggers: nose, nose.importer, "
"nose.inspector, nose.plugins, nose.result and "
"nose.selector. Separate multiple names with a comma.")
parser.add_option(
"--debug-log", dest="debugLog", action="store",
default=self.debugLog, metavar="FILE",
help="Log debug messages to this file "
"(default: sys.stderr)")
parser.add_option(
"--logging-config", "--log-config",
dest="loggingConfig", action="store",
default=self.loggingConfig, metavar="FILE",
help="Load logging config from this file -- bypasses all other"
" logging config settings.")
parser.add_option(
"-I", "--ignore-files", action="append", dest="ignoreFiles",
metavar="REGEX",
help="Completely ignore any file that matches this regular "
"expression. Takes precedence over any other settings or "
"plugins. "
"Specifying this option will replace the default setting. "
"Specify this option multiple times "
"to add more regular expressions [NOSE_IGNORE_FILES]")
parser.add_option(
"-e", "--exclude", action="append", dest="exclude",
metavar="REGEX",
help="Don't run tests that match regular "
"expression [NOSE_EXCLUDE]")
parser.add_option(
"-i", "--include", action="append", dest="include",
metavar="REGEX",
help="This regular expression will be applied to files, "
"directories, function names, and class names for a chance "
"to include additional tests that do not match TESTMATCH. "
"Specify this option multiple times "
"to add more regular expressions [NOSE_INCLUDE]")
parser.add_option(
"-x", "--stop", action="store_true", dest="stopOnError",
default=self.stopOnError,
help="Stop running tests after the first error or failure")
parser.add_option(
"-P", "--no-path-adjustment", action="store_false",
dest="addPaths",
default=self.addPaths,
help="Don't make any changes to sys.path when "
"loading tests [NOSE_NOPATH]")
parser.add_option(
"--exe", action="store_true", dest="includeExe",
default=self.includeExe,
help="Look for tests in python modules that are "
"executable. Normal behavior is to exclude executable "
"modules, since they may not be import-safe "
"[NOSE_INCLUDE_EXE]")
parser.add_option(
"--noexe", action="store_false", dest="includeExe",
help="DO NOT look for tests in python modules that are "
"executable. (The default on the windows platform is to "
"do so.)")
parser.add_option(
"--traverse-namespace", action="store_true",
default=self.traverseNamespace, dest="traverseNamespace",
help="Traverse through all path entries of a namespace package")
parser.add_option(
"--first-package-wins", "--first-pkg-wins", "--1st-pkg-wins",
action="store_true", default=False, dest="firstPackageWins",
help="nose's importer will normally evict a package from sys."
"modules if it sees a package with the same name in a different "
"location. Set this option to disable that behavior.")
parser.add_option(
"--no-byte-compile",
action="store_false", default=True, dest="byteCompile",
help="Prevent nose from byte-compiling the source into .pyc files "
"while nose is scanning for and running tests.")
self.plugins.loadPlugins()
self.pluginOpts(parser)
self.parser = parser
return parser
def help(self, doc=None):
"""Return the generated help message
"""
return self.getParser(doc).format_help()
def pluginOpts(self, parser):
self.plugins.addOptions(parser, self.env)
def reset(self):
self.__dict__.update(self._orig)
def todict(self):
return self.__dict__.copy()
def update(self, d):
self.__dict__.update(d)
class NoOptions(object):
"""Options container that returns None for all options.
"""
def __getstate__(self):
return {}
def __setstate__(self, state):
pass
def __getnewargs__(self):
return ()
def __nonzero__(self):
return False
def user_config_files():
"""Return path to any existing user config files
"""
return filter(os.path.exists,
map(os.path.expanduser, config_files))
def all_config_files():
"""Return path to any existing user config files, plus any setup.cfg
in the current working directory.
"""
user = user_config_files()
if os.path.exists('setup.cfg'):
return user + ['setup.cfg']
return user
# used when parsing config files
def flag(val):
"""Does the value look like an on/off flag?"""
if val == 1:
return True
elif val == 0:
return False
val = str(val)
if len(val) > 5:
return False
return val.upper() in ('1', '0', 'F', 'T', 'TRUE', 'FALSE', 'ON', 'OFF')
def _bool(val):
return str(val).upper() in ('1', 'T', 'TRUE', 'ON')

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"""Implements nose test program and collector.
"""
from __future__ import generators
import logging
import os
import sys
import time
import unittest
from nose.config import Config, all_config_files
from nose.loader import defaultTestLoader
from nose.plugins.manager import PluginManager, DefaultPluginManager, \
RestrictedPluginManager
from nose.result import TextTestResult
from nose.suite import FinalizingSuiteWrapper
from nose.util import isclass, tolist
log = logging.getLogger('nose.core')
compat_24 = sys.version_info >= (2, 4)
__all__ = ['TestProgram', 'main', 'run', 'run_exit', 'runmodule', 'collector',
'TextTestRunner']
class TextTestRunner(unittest.TextTestRunner):
"""Test runner that uses nose's TextTestResult to enable errorClasses,
as well as providing hooks for plugins to override or replace the test
output stream, results, and the test case itself.
"""
def __init__(self, stream=sys.stderr, descriptions=1, verbosity=1,
config=None):
if config is None:
config = Config()
self.config = config
unittest.TextTestRunner.__init__(self, stream, descriptions, verbosity)
def _makeResult(self):
return TextTestResult(self.stream,
self.descriptions,
self.verbosity,
self.config)
def run(self, test):
"""Overrides to provide plugin hooks and defer all output to
the test result class.
"""
wrapper = self.config.plugins.prepareTest(test)
if wrapper is not None:
test = wrapper
# plugins can decorate or capture the output stream
wrapped = self.config.plugins.setOutputStream(self.stream)
if wrapped is not None:
self.stream = wrapped
result = self._makeResult()
start = time.time()
try:
test(result)
except KeyboardInterrupt:
pass
stop = time.time()
result.printErrors()
result.printSummary(start, stop)
self.config.plugins.finalize(result)
return result
class TestProgram(unittest.TestProgram):
"""Collect and run tests, returning success or failure.
The arguments to TestProgram() are the same as to
:func:`main()` and :func:`run()`:
* module: All tests are in this module (default: None)
* defaultTest: Tests to load (default: '.')
* argv: Command line arguments (default: None; sys.argv is read)
* testRunner: Test runner instance (default: None)
* testLoader: Test loader instance (default: None)
* env: Environment; ignored if config is provided (default: None;
os.environ is read)
* config: :class:`nose.config.Config` instance (default: None)
* suite: Suite or list of tests to run (default: None). Passing a
suite or lists of tests will bypass all test discovery and
loading. *ALSO NOTE* that if you pass a unittest.TestSuite
instance as the suite, context fixtures at the class, module and
package level will not be used, and many plugin hooks will not
be called. If you want normal nose behavior, either pass a list
of tests, or a fully-configured :class:`nose.suite.ContextSuite`.
* exit: Exit after running tests and printing report (default: True)
* plugins: List of plugins to use; ignored if config is provided
(default: load plugins with DefaultPluginManager)
* addplugins: List of **extra** plugins to use. Pass a list of plugin
instances in this argument to make custom plugins available while
still using the DefaultPluginManager.
"""
verbosity = 1
def __init__(self, module=None, defaultTest='.', argv=None,
testRunner=None, testLoader=None, env=None, config=None,
suite=None, exit=True, plugins=None, addplugins=None):
if env is None:
env = os.environ
if config is None:
config = self.makeConfig(env, plugins)
if addplugins:
config.plugins.addPlugins(extraplugins=addplugins)
self.config = config
self.suite = suite
self.exit = exit
extra_args = {}
version = sys.version_info[0:2]
if version >= (2,7) and version != (3,0):
extra_args['exit'] = exit
unittest.TestProgram.__init__(
self, module=module, defaultTest=defaultTest,
argv=argv, testRunner=testRunner, testLoader=testLoader,
**extra_args)
def getAllConfigFiles(self, env=None):
env = env or {}
if env.get('NOSE_IGNORE_CONFIG_FILES', False):
return []
else:
return all_config_files()
def makeConfig(self, env, plugins=None):
"""Load a Config, pre-filled with user config files if any are
found.
"""
cfg_files = self.getAllConfigFiles(env)
if plugins:
manager = PluginManager(plugins=plugins)
else:
manager = DefaultPluginManager()
return Config(
env=env, files=cfg_files, plugins=manager)
def parseArgs(self, argv):
"""Parse argv and env and configure running environment.
"""
self.config.configure(argv, doc=self.usage())
log.debug("configured %s", self.config)
# quick outs: version, plugins (optparse would have already
# caught and exited on help)
if self.config.options.version:
from nose import __version__
sys.stdout = sys.__stdout__
print "%s version %s" % (os.path.basename(sys.argv[0]), __version__)
sys.exit(0)
if self.config.options.showPlugins:
self.showPlugins()
sys.exit(0)
if self.testLoader is None:
self.testLoader = defaultTestLoader(config=self.config)
elif isclass(self.testLoader):
self.testLoader = self.testLoader(config=self.config)
plug_loader = self.config.plugins.prepareTestLoader(self.testLoader)
if plug_loader is not None:
self.testLoader = plug_loader
log.debug("test loader is %s", self.testLoader)
# FIXME if self.module is a string, add it to self.testNames? not sure
if self.config.testNames:
self.testNames = self.config.testNames
else:
self.testNames = tolist(self.defaultTest)
log.debug('defaultTest %s', self.defaultTest)
log.debug('Test names are %s', self.testNames)
if self.config.workingDir is not None:
os.chdir(self.config.workingDir)
self.createTests()
def createTests(self):
"""Create the tests to run. If a self.suite
is set, then that suite will be used. Otherwise, tests will be
loaded from the given test names (self.testNames) using the
test loader.
"""
log.debug("createTests called with %s", self.suite)
if self.suite is not None:
# We were given an explicit suite to run. Make sure it's
# loaded and wrapped correctly.
self.test = self.testLoader.suiteClass(self.suite)
else:
self.test = self.testLoader.loadTestsFromNames(self.testNames)
def runTests(self):
"""Run Tests. Returns true on success, false on failure, and sets
self.success to the same value.
"""
log.debug("runTests called")
if self.testRunner is None:
self.testRunner = TextTestRunner(stream=self.config.stream,
verbosity=self.config.verbosity,
config=self.config)
plug_runner = self.config.plugins.prepareTestRunner(self.testRunner)
if plug_runner is not None:
self.testRunner = plug_runner
result = self.testRunner.run(self.test)
self.success = result.wasSuccessful()
if self.exit:
sys.exit(not self.success)
return self.success
def showPlugins(self):
"""Print list of available plugins.
"""
import textwrap
class DummyParser:
def __init__(self):
self.options = []
def add_option(self, *arg, **kw):
self.options.append((arg, kw.pop('help', '')))
v = self.config.verbosity
self.config.plugins.sort()
for p in self.config.plugins:
print "Plugin %s" % p.name
if v >= 2:
print " score: %s" % p.score
print '\n'.join(textwrap.wrap(p.help().strip(),
initial_indent=' ',
subsequent_indent=' '))
if v >= 3:
parser = DummyParser()
p.addOptions(parser)
if len(parser.options):
print
print " Options:"
for opts, help in parser.options:
print ' %s' % (', '.join(opts))
if help:
print '\n'.join(
textwrap.wrap(help.strip(),
initial_indent=' ',
subsequent_indent=' '))
print
def usage(cls):
import nose
try:
ld = nose.__loader__
text = ld.get_data(os.path.join(
os.path.dirname(__file__), 'usage.txt'))
except AttributeError:
f = open(os.path.join(
os.path.dirname(__file__), 'usage.txt'), 'r')
try:
text = f.read()
finally:
f.close()
# Ensure that we return str, not bytes.
if not isinstance(text, str):
text = text.decode('utf-8')
return text
usage = classmethod(usage)
# backwards compatibility
run_exit = main = TestProgram
def run(*arg, **kw):
"""Collect and run tests, returning success or failure.
The arguments to `run()` are the same as to `main()`:
* module: All tests are in this module (default: None)
* defaultTest: Tests to load (default: '.')
* argv: Command line arguments (default: None; sys.argv is read)
* testRunner: Test runner instance (default: None)
* testLoader: Test loader instance (default: None)
* env: Environment; ignored if config is provided (default: None;
os.environ is read)
* config: :class:`nose.config.Config` instance (default: None)
* suite: Suite or list of tests to run (default: None). Passing a
suite or lists of tests will bypass all test discovery and
loading. *ALSO NOTE* that if you pass a unittest.TestSuite
instance as the suite, context fixtures at the class, module and
package level will not be used, and many plugin hooks will not
be called. If you want normal nose behavior, either pass a list
of tests, or a fully-configured :class:`nose.suite.ContextSuite`.
* plugins: List of plugins to use; ignored if config is provided
(default: load plugins with DefaultPluginManager)
* addplugins: List of **extra** plugins to use. Pass a list of plugin
instances in this argument to make custom plugins available while
still using the DefaultPluginManager.
With the exception that the ``exit`` argument is always set
to False.
"""
kw['exit'] = False
return TestProgram(*arg, **kw).success
def runmodule(name='__main__', **kw):
"""Collect and run tests in a single module only. Defaults to running
tests in __main__. Additional arguments to TestProgram may be passed
as keyword arguments.
"""
main(defaultTest=name, **kw)
def collector():
"""TestSuite replacement entry point. Use anywhere you might use a
unittest.TestSuite. The collector will, by default, load options from
all config files and execute loader.loadTestsFromNames() on the
configured testNames, or '.' if no testNames are configured.
"""
# plugins that implement any of these methods are disabled, since
# we don't control the test runner and won't be able to run them
# finalize() is also not called, but plugins that use it aren't disabled,
# because capture needs it.
setuptools_incompat = ('report', 'prepareTest',
'prepareTestLoader', 'prepareTestRunner',
'setOutputStream')
plugins = RestrictedPluginManager(exclude=setuptools_incompat)
conf = Config(files=all_config_files(),
plugins=plugins)
conf.configure(argv=['collector'])
loader = defaultTestLoader(conf)
if conf.testNames:
suite = loader.loadTestsFromNames(conf.testNames)
else:
suite = loader.loadTestsFromNames(('.',))
return FinalizingSuiteWrapper(suite, plugins.finalize)
if __name__ == '__main__':
main()

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"""Exceptions for marking tests as skipped or deprecated.
This module exists to provide backwards compatibility with previous
versions of nose where skipped and deprecated tests were core
functionality, rather than being provided by plugins. It may be
removed in a future release.
"""
from nose.plugins.skip import SkipTest
from nose.plugins.deprecated import DeprecatedTest

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"""
External or vendor files
"""

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import logging
import unittest
from traceback import format_tb
from nose.pyversion import is_base_exception
log = logging.getLogger(__name__)
__all__ = ['Failure']
class Failure(unittest.TestCase):
"""Unloadable or unexecutable test.
A Failure case is placed in a test suite to indicate the presence of a
test that could not be loaded or executed. A common example is a test
module that fails to import.
"""
__test__ = False # do not collect
def __init__(self, exc_class, exc_val, tb=None, address=None):
log.debug("A failure! %s %s %s", exc_class, exc_val, format_tb(tb))
self.exc_class = exc_class
self.exc_val = exc_val
self.tb = tb
self._address = address
unittest.TestCase.__init__(self)
def __str__(self):
return "Failure: %s (%s)" % (
getattr(self.exc_class, '__name__', self.exc_class), self.exc_val)
def address(self):
return self._address
def runTest(self):
if self.tb is not None:
if is_base_exception(self.exc_val):
raise self.exc_val, None, self.tb
raise self.exc_class, self.exc_val, self.tb
else:
raise self.exc_class(self.exc_val)

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"""Implements an importer that looks only in specific path (ignoring
sys.path), and uses a per-path cache in addition to sys.modules. This is
necessary because test modules in different directories frequently have the
same names, which means that the first loaded would mask the rest when using
the builtin importer.
"""
import logging
import os
import sys
from nose.config import Config
from imp import find_module, load_module, acquire_lock, release_lock
log = logging.getLogger(__name__)
try:
_samefile = os.path.samefile
except AttributeError:
def _samefile(src, dst):
return (os.path.normcase(os.path.realpath(src)) ==
os.path.normcase(os.path.realpath(dst)))
class Importer(object):
"""An importer class that does only path-specific imports. That
is, the given module is not searched for on sys.path, but only at
the path or in the directory specified.
"""
def __init__(self, config=None):
if config is None:
config = Config()
self.config = config
def importFromPath(self, path, fqname):
"""Import a dotted-name package whose tail is at path. In other words,
given foo.bar and path/to/foo/bar.py, import foo from path/to/foo then
bar from path/to/foo/bar, returning bar.
"""
# find the base dir of the package
path_parts = os.path.normpath(os.path.abspath(path)).split(os.sep)
name_parts = fqname.split('.')
if path_parts[-1] == '__init__.py':
path_parts.pop()
path_parts = path_parts[:-(len(name_parts))]
dir_path = os.sep.join(path_parts)
# then import fqname starting from that dir
return self.importFromDir(dir_path, fqname)
def importFromDir(self, dir, fqname):
"""Import a module *only* from path, ignoring sys.path and
reloading if the version in sys.modules is not the one we want.
"""
dir = os.path.normpath(os.path.abspath(dir))
log.debug("Import %s from %s", fqname, dir)
# FIXME reimplement local per-dir cache?
# special case for __main__
if fqname == '__main__':
return sys.modules[fqname]
if self.config.addPaths:
add_path(dir, self.config)
path = [dir]
parts = fqname.split('.')
part_fqname = ''
mod = parent = fh = None
for part in parts:
if part_fqname == '':
part_fqname = part
else:
part_fqname = "%s.%s" % (part_fqname, part)
try:
acquire_lock()
log.debug("find module part %s (%s) in %s",
part, part_fqname, path)
fh, filename, desc = find_module(part, path)
old = sys.modules.get(part_fqname)
if old is not None:
# test modules frequently have name overlap; make sure
# we get a fresh copy of anything we are trying to load
# from a new path
log.debug("sys.modules has %s as %s", part_fqname, old)
if (self.sameModule(old, filename)
or (self.config.firstPackageWins and
getattr(old, '__path__', None))):
mod = old
else:
del sys.modules[part_fqname]
mod = load_module(part_fqname, fh, filename, desc)
else:
mod = load_module(part_fqname, fh, filename, desc)
finally:
if fh:
fh.close()
release_lock()
if parent:
setattr(parent, part, mod)
if hasattr(mod, '__path__'):
path = mod.__path__
parent = mod
return mod
def _dirname_if_file(self, filename):
# We only take the dirname if we have a path to a non-dir,
# because taking the dirname of a symlink to a directory does not
# give the actual directory parent.
if os.path.isdir(filename):
return filename
else:
return os.path.dirname(filename)
def sameModule(self, mod, filename):
mod_paths = []
if hasattr(mod, '__path__'):
for path in mod.__path__:
mod_paths.append(self._dirname_if_file(path))
elif hasattr(mod, '__file__'):
mod_paths.append(self._dirname_if_file(mod.__file__))
else:
# builtin or other module-like object that
# doesn't have __file__; must be new
return False
new_path = self._dirname_if_file(filename)
for mod_path in mod_paths:
log.debug(
"module already loaded? mod: %s new: %s",
mod_path, new_path)
if _samefile(mod_path, new_path):
return True
return False
def add_path(path, config=None):
"""Ensure that the path, or the root of the current package (if
path is in a package), is in sys.path.
"""
# FIXME add any src-looking dirs seen too... need to get config for that
log.debug('Add path %s' % path)
if not path:
return []
added = []
parent = os.path.dirname(path)
if (parent
and os.path.exists(os.path.join(path, '__init__.py'))):
added.extend(add_path(parent, config))
elif not path in sys.path:
log.debug("insert %s into sys.path", path)
sys.path.insert(0, path)
added.append(path)
if config and config.srcDirs:
for dirname in config.srcDirs:
dirpath = os.path.join(path, dirname)
if os.path.isdir(dirpath):
sys.path.insert(0, dirpath)
added.append(dirpath)
return added
def remove_path(path):
log.debug('Remove path %s' % path)
if path in sys.path:
sys.path.remove(path)

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"""Simple traceback introspection. Used to add additional information to
AssertionErrors in tests, so that failure messages may be more informative.
"""
import inspect
import logging
import re
import sys
import textwrap
import tokenize
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
log = logging.getLogger(__name__)
def inspect_traceback(tb):
"""Inspect a traceback and its frame, returning source for the expression
where the exception was raised, with simple variable replacement performed
and the line on which the exception was raised marked with '>>'
"""
log.debug('inspect traceback %s', tb)
# we only want the innermost frame, where the exception was raised
while tb.tb_next:
tb = tb.tb_next
frame = tb.tb_frame
lines, exc_line = tbsource(tb)
# figure out the set of lines to grab.
inspect_lines, mark_line = find_inspectable_lines(lines, exc_line)
src = StringIO(textwrap.dedent(''.join(inspect_lines)))
exp = Expander(frame.f_locals, frame.f_globals)
while inspect_lines:
try:
for tok in tokenize.generate_tokens(src.readline):
exp(*tok)
except tokenize.TokenError, e:
# this can happen if our inspectable region happens to butt up
# against the end of a construct like a docstring with the closing
# """ on separate line
log.debug("Tokenizer error: %s", e)
inspect_lines.pop(0)
mark_line -= 1
src = StringIO(textwrap.dedent(''.join(inspect_lines)))
exp = Expander(frame.f_locals, frame.f_globals)
continue
break
padded = []
if exp.expanded_source:
exp_lines = exp.expanded_source.split('\n')
ep = 0
for line in exp_lines:
if ep == mark_line:
padded.append('>> ' + line)
else:
padded.append(' ' + line)
ep += 1
return '\n'.join(padded)
def tbsource(tb, context=6):
"""Get source from a traceback object.
A tuple of two things is returned: a list of lines of context from
the source code, and the index of the current line within that list.
The optional second argument specifies the number of lines of context
to return, which are centered around the current line.
.. Note ::
This is adapted from inspect.py in the python 2.4 standard library,
since a bug in the 2.3 version of inspect prevents it from correctly
locating source lines in a traceback frame.
"""
lineno = tb.tb_lineno
frame = tb.tb_frame
if context > 0:
start = lineno - 1 - context//2
log.debug("lineno: %s start: %s", lineno, start)
try:
lines, dummy = inspect.findsource(frame)
except IOError:
lines, index = [''], 0
else:
all_lines = lines
start = max(start, 1)
start = max(0, min(start, len(lines) - context))
lines = lines[start:start+context]
index = lineno - 1 - start
# python 2.5 compat: if previous line ends in a continuation,
# decrement start by 1 to match 2.4 behavior
if sys.version_info >= (2, 5) and index > 0:
while lines[index-1].strip().endswith('\\'):
start -= 1
lines = all_lines[start:start+context]
else:
lines, index = [''], 0
log.debug("tbsource lines '''%s''' around index %s", lines, index)
return (lines, index)
def find_inspectable_lines(lines, pos):
"""Find lines in home that are inspectable.
Walk back from the err line up to 3 lines, but don't walk back over
changes in indent level.
Walk forward up to 3 lines, counting \ separated lines as 1. Don't walk
over changes in indent level (unless part of an extended line)
"""
cnt = re.compile(r'\\[\s\n]*$')
df = re.compile(r':[\s\n]*$')
ind = re.compile(r'^(\s*)')
toinspect = []
home = lines[pos]
home_indent = ind.match(home).groups()[0]
before = lines[max(pos-3, 0):pos]
before.reverse()
after = lines[pos+1:min(pos+4, len(lines))]
for line in before:
if ind.match(line).groups()[0] == home_indent:
toinspect.append(line)
else:
break
toinspect.reverse()
toinspect.append(home)
home_pos = len(toinspect)-1
continued = cnt.search(home)
for line in after:
if ((continued or ind.match(line).groups()[0] == home_indent)
and not df.search(line)):
toinspect.append(line)
continued = cnt.search(line)
else:
break
log.debug("Inspecting lines '''%s''' around %s", toinspect, home_pos)
return toinspect, home_pos
class Expander:
"""Simple expression expander. Uses tokenize to find the names and
expands any that can be looked up in the frame.
"""
def __init__(self, locals, globals):
self.locals = locals
self.globals = globals
self.lpos = None
self.expanded_source = ''
def __call__(self, ttype, tok, start, end, line):
# TODO
# deal with unicode properly
# TODO
# Dealing with instance members
# always keep the last thing seen
# if the current token is a dot,
# get ready to getattr(lastthing, this thing) on the
# next call.
if self.lpos is not None:
if start[1] >= self.lpos:
self.expanded_source += ' ' * (start[1]-self.lpos)
elif start[1] < self.lpos:
# newline, indent correctly
self.expanded_source += ' ' * start[1]
self.lpos = end[1]
if ttype == tokenize.INDENT:
pass
elif ttype == tokenize.NAME:
# Clean this junk up
try:
val = self.locals[tok]
if callable(val):
val = tok
else:
val = repr(val)
except KeyError:
try:
val = self.globals[tok]
if callable(val):
val = tok
else:
val = repr(val)
except KeyError:
val = tok
# FIXME... not sure how to handle things like funcs, classes
# FIXME this is broken for some unicode strings
self.expanded_source += val
else:
self.expanded_source += tok
# if this is the end of the line and the line ends with
# \, then tack a \ and newline onto the output
# print line[end[1]:]
if re.match(r'\s+\\\n', line[end[1]:]):
self.expanded_source += ' \\\n'

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"""
Test Loader
-----------
nose's test loader implements the same basic functionality as its
superclass, unittest.TestLoader, but extends it by more liberal
interpretations of what may be a test and how a test may be named.
"""
from __future__ import generators
import logging
import os
import sys
import unittest
import types
from inspect import isfunction
from nose.pyversion import unbound_method, ismethod
from nose.case import FunctionTestCase, MethodTestCase
from nose.failure import Failure
from nose.config import Config
from nose.importer import Importer, add_path, remove_path
from nose.selector import defaultSelector, TestAddress
from nose.util import func_lineno, getpackage, isclass, isgenerator, \
ispackage, regex_last_key, resolve_name, transplant_func, \
transplant_class, test_address
from nose.suite import ContextSuiteFactory, ContextList, LazySuite
from nose.pyversion import sort_list, cmp_to_key
log = logging.getLogger(__name__)
#log.setLevel(logging.DEBUG)
# for efficiency and easier mocking
op_normpath = os.path.normpath
op_abspath = os.path.abspath
op_join = os.path.join
op_isdir = os.path.isdir
op_isfile = os.path.isfile
__all__ = ['TestLoader', 'defaultTestLoader']
class TestLoader(unittest.TestLoader):
"""Test loader that extends unittest.TestLoader to:
* Load tests from test-like functions and classes that are not
unittest.TestCase subclasses
* Find and load test modules in a directory
* Support tests that are generators
* Support easy extensions of or changes to that behavior through plugins
"""
config = None
importer = None
workingDir = None
selector = None
suiteClass = None
def __init__(self, config=None, importer=None, workingDir=None,
selector=None):
"""Initialize a test loader.
Parameters (all optional):
* config: provide a `nose.config.Config`_ or other config class
instance; if not provided a `nose.config.Config`_ with
default values is used.
* importer: provide an importer instance that implements
`importFromPath`. If not provided, a
`nose.importer.Importer`_ is used.
* workingDir: the directory to which file and module names are
relative. If not provided, assumed to be the current working
directory.
* selector: a selector class or instance. If a class is
provided, it will be instantiated with one argument, the
current config. If not provided, a `nose.selector.Selector`_
is used.
"""
if config is None:
config = Config()
if importer is None:
importer = Importer(config=config)
if workingDir is None:
workingDir = config.workingDir
if selector is None:
selector = defaultSelector(config)
elif isclass(selector):
selector = selector(config)
self.config = config
self.importer = importer
self.workingDir = op_normpath(op_abspath(workingDir))
self.selector = selector
if config.addPaths:
add_path(workingDir, config)
self.suiteClass = ContextSuiteFactory(config=config)
self._visitedPaths = set([])
unittest.TestLoader.__init__(self)
def getTestCaseNames(self, testCaseClass):
"""Override to select with selector, unless
config.getTestCaseNamesCompat is True
"""
if self.config.getTestCaseNamesCompat:
return unittest.TestLoader.getTestCaseNames(self, testCaseClass)
def wanted(attr, cls=testCaseClass, sel=self.selector):
item = getattr(cls, attr, None)
if isfunction(item):
item = unbound_method(cls, item)
elif not ismethod(item):
return False
return sel.wantMethod(item)
cases = filter(wanted, dir(testCaseClass))
# add runTest if nothing else picked
if not cases and hasattr(testCaseClass, 'runTest'):
cases = ['runTest']
if self.sortTestMethodsUsing:
sort_list(cases, cmp_to_key(self.sortTestMethodsUsing))
return cases
def _haveVisited(self, path):
# For cases where path is None, we always pretend we haven't visited
# them.
if path is None:
return False
return path in self._visitedPaths
def _addVisitedPath(self, path):
if path is not None:
self._visitedPaths.add(path)
def loadTestsFromDir(self, path):
"""Load tests from the directory at path. This is a generator
-- each suite of tests from a module or other file is yielded
and is expected to be executed before the next file is
examined.
"""
log.debug("load from dir %s", path)
plugins = self.config.plugins
plugins.beforeDirectory(path)
if self.config.addPaths:
paths_added = add_path(path, self.config)
entries = os.listdir(path)
sort_list(entries, regex_last_key(self.config.testMatch))
for entry in entries:
# this hard-coded initial-dot test will be removed:
# http://code.google.com/p/python-nose/issues/detail?id=82
if entry.startswith('.'):
continue
entry_path = op_abspath(op_join(path, entry))
is_file = op_isfile(entry_path)
wanted = False
if is_file:
is_dir = False
wanted = self.selector.wantFile(entry_path)
else:
is_dir = op_isdir(entry_path)
if is_dir:
# this hard-coded initial-underscore test will be removed:
# http://code.google.com/p/python-nose/issues/detail?id=82
if entry.startswith('_'):
continue
wanted = self.selector.wantDirectory(entry_path)
is_package = ispackage(entry_path)
# Python 3.3 now implements PEP 420: Implicit Namespace Packages.
# As a result, it's now possible that parent paths that have a
# segment with the same basename as our package ends up
# in module.__path__. So we have to keep track of what we've
# visited, and not-revisit them again.
if wanted and not self._haveVisited(entry_path):
self._addVisitedPath(entry_path)
if is_file:
plugins.beforeContext()
if entry.endswith('.py'):
yield self.loadTestsFromName(
entry_path, discovered=True)
else:
yield self.loadTestsFromFile(entry_path)
plugins.afterContext()
elif is_package:
# Load the entry as a package: given the full path,
# loadTestsFromName() will figure it out
yield self.loadTestsFromName(
entry_path, discovered=True)
else:
# Another test dir in this one: recurse lazily
yield self.suiteClass(
lambda: self.loadTestsFromDir(entry_path))
tests = []
for test in plugins.loadTestsFromDir(path):
tests.append(test)
# TODO: is this try/except needed?
try:
if tests:
yield self.suiteClass(tests)
except (KeyboardInterrupt, SystemExit):
raise
except:
yield self.suiteClass([Failure(*sys.exc_info())])
# pop paths
if self.config.addPaths:
for p in paths_added:
remove_path(p)
plugins.afterDirectory(path)
def loadTestsFromFile(self, filename):
"""Load tests from a non-module file. Default is to raise a
ValueError; plugins may implement `loadTestsFromFile` to
provide a list of tests loaded from the file.
"""
log.debug("Load from non-module file %s", filename)
try:
tests = [test for test in
self.config.plugins.loadTestsFromFile(filename)]
if tests:
# Plugins can yield False to indicate that they were
# unable to load tests from a file, but it was not an
# error -- the file just had no tests to load.
tests = filter(None, tests)
return self.suiteClass(tests)
else:
# Nothing was able to even try to load from this file
open(filename, 'r').close() # trigger os error
raise ValueError("Unable to load tests from file %s"
% filename)
except (KeyboardInterrupt, SystemExit):
raise
except:
exc = sys.exc_info()
return self.suiteClass(
[Failure(exc[0], exc[1], exc[2],
address=(filename, None, None))])
def loadTestsFromGenerator(self, generator, module):
"""Lazy-load tests from a generator function. The generator function
may yield either:
* a callable, or
* a function name resolvable within the same module
"""
def generate(g=generator, m=module):
try:
for test in g():
test_func, arg = self.parseGeneratedTest(test)
if not callable(test_func):
test_func = getattr(m, test_func)
yield FunctionTestCase(test_func, arg=arg, descriptor=g)
except KeyboardInterrupt:
raise
except:
exc = sys.exc_info()
yield Failure(exc[0], exc[1], exc[2],
address=test_address(generator))
return self.suiteClass(generate, context=generator, can_split=False)
def loadTestsFromGeneratorMethod(self, generator, cls):
"""Lazy-load tests from a generator method.
This is more complicated than loading from a generator function,
since a generator method may yield:
* a function
* a bound or unbound method, or
* a method name
"""
# convert the unbound generator method
# into a bound method so it can be called below
if hasattr(generator, 'im_class'):
cls = generator.im_class
inst = cls()
method = generator.__name__
generator = getattr(inst, method)
def generate(g=generator, c=cls):
try:
for test in g():
test_func, arg = self.parseGeneratedTest(test)
if not callable(test_func):
test_func = unbound_method(c, getattr(c, test_func))
if ismethod(test_func):
yield MethodTestCase(test_func, arg=arg, descriptor=g)
elif callable(test_func):
# In this case we're forcing the 'MethodTestCase'
# to run the inline function as its test call,
# but using the generator method as the 'method of
# record' (so no need to pass it as the descriptor)
yield MethodTestCase(g, test=test_func, arg=arg)
else:
yield Failure(
TypeError,
"%s is not a callable or method" % test_func)
except KeyboardInterrupt:
raise
except:
exc = sys.exc_info()
yield Failure(exc[0], exc[1], exc[2],
address=test_address(generator))
return self.suiteClass(generate, context=generator, can_split=False)
def loadTestsFromModule(self, module, path=None, discovered=False):
"""Load all tests from module and return a suite containing
them. If the module has been discovered and is not test-like,
the suite will be empty by default, though plugins may add
their own tests.
"""
log.debug("Load from module %s", module)
tests = []
test_classes = []
test_funcs = []
# For *discovered* modules, we only load tests when the module looks
# testlike. For modules we've been directed to load, we always
# look for tests. (discovered is set to True by loadTestsFromDir)
if not discovered or self.selector.wantModule(module):
for item in dir(module):
test = getattr(module, item, None)
# print "Check %s (%s) in %s" % (item, test, module.__name__)
if isclass(test):
if self.selector.wantClass(test):
test_classes.append(test)
elif isfunction(test) and self.selector.wantFunction(test):
test_funcs.append(test)
sort_list(test_classes, lambda x: x.__name__)
sort_list(test_funcs, func_lineno)
tests = map(lambda t: self.makeTest(t, parent=module),
test_classes + test_funcs)
# Now, descend into packages
# FIXME can or should this be lazy?
# is this syntax 2.2 compatible?
module_paths = getattr(module, '__path__', [])
if path:
path = os.path.normcase(os.path.realpath(path))
for module_path in module_paths:
log.debug("Load tests from module path %s?", module_path)
log.debug("path: %s os.path.realpath(%s): %s",
path, os.path.normcase(module_path),
os.path.realpath(os.path.normcase(module_path)))
if (self.config.traverseNamespace or not path) or \
os.path.realpath(
os.path.normcase(module_path)).startswith(path):
# Egg files can be on sys.path, so make sure the path is a
# directory before trying to load from it.
if os.path.isdir(module_path):
tests.extend(self.loadTestsFromDir(module_path))
for test in self.config.plugins.loadTestsFromModule(module, path):
tests.append(test)
return self.suiteClass(ContextList(tests, context=module))
def loadTestsFromName(self, name, module=None, discovered=False):
"""Load tests from the entity with the given name.
The name may indicate a file, directory, module, or any object
within a module. See `nose.util.split_test_name` for details on
test name parsing.
"""
# FIXME refactor this method into little bites?
log.debug("load from %s (%s)", name, module)
suite = self.suiteClass
# give plugins first crack
plug_tests = self.config.plugins.loadTestsFromName(name, module)
if plug_tests:
return suite(plug_tests)
addr = TestAddress(name, workingDir=self.workingDir)
if module:
# Two cases:
# name is class.foo
# The addr will be incorrect, since it thinks class.foo is
# a dotted module name. It's actually a dotted attribute
# name. In this case we want to use the full submitted
# name as the name to load from the module.
# name is module:class.foo
# The addr will be correct. The part we want is the part after
# the :, which is in addr.call.
if addr.call:
name = addr.call
parent, obj = self.resolve(name, module)
if (isclass(parent)
and getattr(parent, '__module__', None) != module.__name__
and not isinstance(obj, Failure)):
parent = transplant_class(parent, module.__name__)
obj = getattr(parent, obj.__name__)
log.debug("parent %s obj %s module %s", parent, obj, module)
if isinstance(obj, Failure):
return suite([obj])
else:
return suite(ContextList([self.makeTest(obj, parent)],
context=parent))
else:
if addr.module:
try:
if addr.filename is None:
module = resolve_name(addr.module)
else:
self.config.plugins.beforeImport(
addr.filename, addr.module)
# FIXME: to support module.name names,
# do what resolve-name does and keep trying to
# import, popping tail of module into addr.call,
# until we either get an import or run out of
# module parts
try:
module = self.importer.importFromPath(
addr.filename, addr.module)
finally:
self.config.plugins.afterImport(
addr.filename, addr.module)
except (KeyboardInterrupt, SystemExit):
raise
except:
exc = sys.exc_info()
return suite([Failure(exc[0], exc[1], exc[2],
address=addr.totuple())])
if addr.call:
return self.loadTestsFromName(addr.call, module)
else:
return self.loadTestsFromModule(
module, addr.filename,
discovered=discovered)
elif addr.filename:
path = addr.filename
if addr.call:
package = getpackage(path)
if package is None:
return suite([
Failure(ValueError,
"Can't find callable %s in file %s: "
"file is not a python module" %
(addr.call, path),
address=addr.totuple())])
return self.loadTestsFromName(addr.call, module=package)
else:
if op_isdir(path):
# In this case we *can* be lazy since we know
# that each module in the dir will be fully
# loaded before its tests are executed; we
# also know that we're not going to be asked
# to load from . and ./some_module.py *as part
# of this named test load*
return LazySuite(
lambda: self.loadTestsFromDir(path))
elif op_isfile(path):
return self.loadTestsFromFile(path)
else:
return suite([
Failure(OSError, "No such file %s" % path,
address=addr.totuple())])
else:
# just a function? what to do? I think it can only be
# handled when module is not None
return suite([
Failure(ValueError, "Unresolvable test name %s" % name,
address=addr.totuple())])
def loadTestsFromNames(self, names, module=None):
"""Load tests from all names, returning a suite containing all
tests.
"""
plug_res = self.config.plugins.loadTestsFromNames(names, module)
if plug_res:
suite, names = plug_res
if suite:
return self.suiteClass([
self.suiteClass(suite),
unittest.TestLoader.loadTestsFromNames(self, names, module)
])
return unittest.TestLoader.loadTestsFromNames(self, names, module)
def loadTestsFromTestCase(self, testCaseClass):
"""Load tests from a unittest.TestCase subclass.
"""
cases = []
plugins = self.config.plugins
for case in plugins.loadTestsFromTestCase(testCaseClass):
cases.append(case)
# For efficiency in the most common case, just call and return from
# super. This avoids having to extract cases and rebuild a context
# suite when there are no plugin-contributed cases.
if not cases:
return super(TestLoader, self).loadTestsFromTestCase(testCaseClass)
cases.extend(
[case for case in
super(TestLoader, self).loadTestsFromTestCase(testCaseClass)])
return self.suiteClass(cases)
def loadTestsFromTestClass(self, cls):
"""Load tests from a test class that is *not* a unittest.TestCase
subclass.
In this case, we can't depend on the class's `__init__` taking method
name arguments, so we have to compose a MethodTestCase for each
method in the class that looks testlike.
"""
def wanted(attr, cls=cls, sel=self.selector):
item = getattr(cls, attr, None)
if isfunction(item):
item = unbound_method(cls, item)
elif not ismethod(item):
return False
return sel.wantMethod(item)
cases = [self.makeTest(getattr(cls, case), cls)
for case in filter(wanted, dir(cls))]
for test in self.config.plugins.loadTestsFromTestClass(cls):
cases.append(test)
return self.suiteClass(ContextList(cases, context=cls))
def makeTest(self, obj, parent=None):
try:
return self._makeTest(obj, parent)
except (KeyboardInterrupt, SystemExit):
raise
except:
exc = sys.exc_info()
try:
addr = test_address(obj)
except KeyboardInterrupt:
raise
except:
addr = None
return Failure(exc[0], exc[1], exc[2], address=addr)
def _makeTest(self, obj, parent=None):
"""Given a test object and its parent, return a test case
or test suite.
"""
plug_tests = []
try:
addr = test_address(obj)
except KeyboardInterrupt:
raise
except:
addr = None
for test in self.config.plugins.makeTest(obj, parent):
plug_tests.append(test)
# TODO: is this try/except needed?
try:
if plug_tests:
return self.suiteClass(plug_tests)
except (KeyboardInterrupt, SystemExit):
raise
except:
exc = sys.exc_info()
return Failure(exc[0], exc[1], exc[2], address=addr)
if isfunction(obj) and parent and not isinstance(parent, types.ModuleType):
# This is a Python 3.x 'unbound method'. Wrap it with its
# associated class..
obj = unbound_method(parent, obj)
if isinstance(obj, unittest.TestCase):
return obj
elif isclass(obj):
if parent and obj.__module__ != parent.__name__:
obj = transplant_class(obj, parent.__name__)
if issubclass(obj, unittest.TestCase):
return self.loadTestsFromTestCase(obj)
else:
return self.loadTestsFromTestClass(obj)
elif ismethod(obj):
if parent is None:
parent = obj.__class__
if issubclass(parent, unittest.TestCase):
return parent(obj.__name__)
else:
if isgenerator(obj):
return self.loadTestsFromGeneratorMethod(obj, parent)
else:
return MethodTestCase(obj)
elif isfunction(obj):
if parent and obj.__module__ != parent.__name__:
obj = transplant_func(obj, parent.__name__)
if isgenerator(obj):
return self.loadTestsFromGenerator(obj, parent)
else:
return FunctionTestCase(obj)
else:
return Failure(TypeError,
"Can't make a test from %s" % obj,
address=addr)
def resolve(self, name, module):
"""Resolve name within module
"""
obj = module
parts = name.split('.')
for part in parts:
parent, obj = obj, getattr(obj, part, None)
if obj is None:
# no such test
obj = Failure(ValueError, "No such test %s" % name)
return parent, obj
def parseGeneratedTest(self, test):
"""Given the yield value of a test generator, return a func and args.
This is used in the two loadTestsFromGenerator* methods.
"""
if not isinstance(test, tuple): # yield test
test_func, arg = (test, tuple())
elif len(test) == 1: # yield (test,)
test_func, arg = (test[0], tuple())
else: # yield test, foo, bar, ...
assert len(test) > 1 # sanity check
test_func, arg = (test[0], test[1:])
return test_func, arg
defaultTestLoader = TestLoader

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"""
Writing Plugins
---------------
nose supports plugins for test collection, selection, observation and
reporting. There are two basic rules for plugins:
* Plugin classes should subclass :class:`nose.plugins.Plugin`.
* Plugins may implement any of the methods described in the class
:doc:`IPluginInterface <interface>` in nose.plugins.base. Please note that
this class is for documentary purposes only; plugins may not subclass
IPluginInterface.
Hello World
===========
Here's a basic plugin. It doesn't do much so read on for more ideas or dive
into the :doc:`IPluginInterface <interface>` to see all available hooks.
.. code-block:: python
import logging
import os
from nose.plugins import Plugin
log = logging.getLogger('nose.plugins.helloworld')
class HelloWorld(Plugin):
name = 'helloworld'
def options(self, parser, env=os.environ):
super(HelloWorld, self).options(parser, env=env)
def configure(self, options, conf):
super(HelloWorld, self).configure(options, conf)
if not self.enabled:
return
def finalize(self, result):
log.info('Hello pluginized world!')
Registering
===========
.. Note::
Important note: the following applies only to the default
plugin manager. Other plugin managers may use different means to
locate and load plugins.
For nose to find a plugin, it must be part of a package that uses
setuptools_, and the plugin must be included in the entry points defined
in the setup.py for the package:
.. code-block:: python
setup(name='Some plugin',
# ...
entry_points = {
'nose.plugins.0.10': [
'someplugin = someplugin:SomePlugin'
]
},
# ...
)
Once the package is installed with install or develop, nose will be able
to load the plugin.
.. _setuptools: http://peak.telecommunity.com/DevCenter/setuptools
Registering a plugin without setuptools
=======================================
It is currently possible to register a plugin programmatically by
creating a custom nose runner like this :
.. code-block:: python
import nose
from yourplugin import YourPlugin
if __name__ == '__main__':
nose.main(addplugins=[YourPlugin()])
Defining options
================
All plugins must implement the methods ``options(self, parser, env)``
and ``configure(self, options, conf)``. Subclasses of nose.plugins.Plugin
that want the standard options should call the superclass methods.
nose uses optparse.OptionParser from the standard library to parse
arguments. A plugin's ``options()`` method receives a parser
instance. It's good form for a plugin to use that instance only to add
additional arguments that take only long arguments (--like-this). Most
of nose's built-in arguments get their default value from an environment
variable.
A plugin's ``configure()`` method receives the parsed ``OptionParser`` options
object, as well as the current config object. Plugins should configure their
behavior based on the user-selected settings, and may raise exceptions
if the configured behavior is nonsensical.
Logging
=======
nose uses the logging classes from the standard library. To enable users
to view debug messages easily, plugins should use ``logging.getLogger()`` to
acquire a logger in the ``nose.plugins`` namespace.
Recipes
=======
* Writing a plugin that monitors or controls test result output
Implement any or all of ``addError``, ``addFailure``, etc., to monitor test
results. If you also want to monitor output, implement
``setOutputStream`` and keep a reference to the output stream. If you
want to prevent the builtin ``TextTestResult`` output, implement
``setOutputSteam`` and *return a dummy stream*. The default output will go
to the dummy stream, while you send your desired output to the real stream.
Example: `examples/html_plugin/htmlplug.py`_
* Writing a plugin that handles exceptions
Subclass :doc:`ErrorClassPlugin <errorclasses>`.
Examples: :doc:`nose.plugins.deprecated <deprecated>`,
:doc:`nose.plugins.skip <skip>`
* Writing a plugin that adds detail to error reports
Implement ``formatError`` and/or ``formatFailure``. The error tuple
you return (error class, error message, traceback) will replace the
original error tuple.
Examples: :doc:`nose.plugins.capture <capture>`,
:doc:`nose.plugins.failuredetail <failuredetail>`
* Writing a plugin that loads tests from files other than python modules
Implement ``wantFile`` and ``loadTestsFromFile``. In ``wantFile``,
return True for files that you want to examine for tests. In
``loadTestsFromFile``, for those files, return an iterable
containing TestCases (or yield them as you find them;
``loadTestsFromFile`` may also be a generator).
Example: :doc:`nose.plugins.doctests <doctests>`
* Writing a plugin that prints a report
Implement ``begin`` if you need to perform setup before testing
begins. Implement ``report`` and output your report to the provided stream.
Examples: :doc:`nose.plugins.cover <cover>`, :doc:`nose.plugins.prof <prof>`
* Writing a plugin that selects or rejects tests
Implement any or all ``want*`` methods. Return False to reject the test
candidate, True to accept it -- which means that the test candidate
will pass through the rest of the system, so you must be prepared to
load tests from it if tests can't be loaded by the core loader or
another plugin -- and None if you don't care.
Examples: :doc:`nose.plugins.attrib <attrib>`,
:doc:`nose.plugins.doctests <doctests>`, :doc:`nose.plugins.testid <testid>`
More Examples
=============
See any builtin plugin or example plugin in the examples_ directory in
the nose source distribution. There is a list of third-party plugins
`on jottit`_.
.. _examples/html_plugin/htmlplug.py: http://python-nose.googlecode.com/svn/trunk/examples/html_plugin/htmlplug.py
.. _examples: http://python-nose.googlecode.com/svn/trunk/examples
.. _on jottit: http://nose-plugins.jottit.com/
"""
from nose.plugins.base import Plugin
from nose.plugins.manager import *
from nose.plugins.plugintest import PluginTester
if __name__ == '__main__':
import doctest
doctest.testmod()

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"""Use the AllModules plugin by passing ``--all-modules`` or setting the
NOSE_ALL_MODULES environment variable to enable collection and execution of
tests in all python modules. Normal nose behavior is to look for tests only in
modules that match testMatch.
More information: :doc:`../doc_tests/test_allmodules/test_allmodules`
.. warning ::
This plugin can have surprising interactions with plugins that load tests
from what nose normally considers non-test modules, such as
the :doc:`doctest plugin <doctests>`. This is because any given
object in a module can't be loaded both by a plugin and the normal nose
:class:`test loader <nose.loader.TestLoader>`. Also, if you have functions
or classes in non-test modules that look like tests but aren't, you will
likely see errors as nose attempts to run them as tests.
"""
import os
from nose.plugins.base import Plugin
class AllModules(Plugin):
"""Collect tests from all python modules.
"""
def options(self, parser, env):
"""Register commandline options.
"""
env_opt = 'NOSE_ALL_MODULES'
parser.add_option('--all-modules',
action="store_true",
dest=self.enableOpt,
default=env.get(env_opt),
help="Enable plugin %s: %s [%s]" %
(self.__class__.__name__, self.help(), env_opt))
def wantFile(self, file):
"""Override to return True for all files ending with .py"""
# always want .py files
if file.endswith('.py'):
return True
def wantModule(self, module):
"""Override return True for all modules"""
return True

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"""Attribute selector plugin.
Oftentimes when testing you will want to select tests based on
criteria rather then simply by filename. For example, you might want
to run all tests except for the slow ones. You can do this with the
Attribute selector plugin by setting attributes on your test methods.
Here is an example:
.. code-block:: python
def test_big_download():
import urllib
# commence slowness...
test_big_download.slow = 1
Once you've assigned an attribute ``slow = 1`` you can exclude that
test and all other tests having the slow attribute by running ::
$ nosetests -a '!slow'
There is also a decorator available for you that will set attributes.
Here's how to set ``slow=1`` like above with the decorator:
.. code-block:: python
from nose.plugins.attrib import attr
@attr('slow')
def test_big_download():
import urllib
# commence slowness...
And here's how to set an attribute with a specific value:
.. code-block:: python
from nose.plugins.attrib import attr
@attr(speed='slow')
def test_big_download():
import urllib
# commence slowness...
This test could be run with ::
$ nosetests -a speed=slow
In Python 2.6 and higher, ``@attr`` can be used on a class to set attributes
on all its test methods at once. For example:
.. code-block:: python
from nose.plugins.attrib import attr
@attr(speed='slow')
class MyTestCase:
def test_long_integration(self):
pass
def test_end_to_end_something(self):
pass
Below is a reference to the different syntaxes available.
Simple syntax
-------------
Examples of using the ``-a`` and ``--attr`` options:
* ``nosetests -a status=stable``
Only runs tests with attribute "status" having value "stable"
* ``nosetests -a priority=2,status=stable``
Runs tests having both attributes and values
* ``nosetests -a priority=2 -a slow``
Runs tests that match either attribute
* ``nosetests -a tags=http``
If a test's ``tags`` attribute was a list and it contained the value
``http`` then it would be run
* ``nosetests -a slow``
Runs tests with the attribute ``slow`` if its value does not equal False
(False, [], "", etc...)
* ``nosetests -a '!slow'``
Runs tests that do NOT have the attribute ``slow`` or have a ``slow``
attribute that is equal to False
**NOTE**:
if your shell (like bash) interprets '!' as a special character make sure to
put single quotes around it.
Expression Evaluation
---------------------
Examples using the ``-A`` and ``--eval-attr`` options:
* ``nosetests -A "not slow"``
Evaluates the Python expression "not slow" and runs the test if True
* ``nosetests -A "(priority > 5) and not slow"``
Evaluates a complex Python expression and runs the test if True
"""
import inspect
import logging
import os
import sys
from inspect import isfunction
from nose.plugins.base import Plugin
from nose.util import tolist
log = logging.getLogger('nose.plugins.attrib')
compat_24 = sys.version_info >= (2, 4)
def attr(*args, **kwargs):
"""Decorator that adds attributes to classes or functions
for use with the Attribute (-a) plugin.
"""
def wrap_ob(ob):
for name in args:
setattr(ob, name, True)
for name, value in kwargs.iteritems():
setattr(ob, name, value)
return ob
return wrap_ob
def get_method_attr(method, cls, attr_name, default = False):
"""Look up an attribute on a method/ function.
If the attribute isn't found there, looking it up in the
method's class, if any.
"""
Missing = object()
value = getattr(method, attr_name, Missing)
if value is Missing and cls is not None:
value = getattr(cls, attr_name, Missing)
if value is Missing:
return default
return value
class ContextHelper:
"""Object that can act as context dictionary for eval and looks up
names as attributes on a method/ function and its class.
"""
def __init__(self, method, cls):
self.method = method
self.cls = cls
def __getitem__(self, name):
return get_method_attr(self.method, self.cls, name)
class AttributeSelector(Plugin):
"""Selects test cases to be run based on their attributes.
"""
def __init__(self):
Plugin.__init__(self)
self.attribs = []
def options(self, parser, env):
"""Register command line options"""
parser.add_option("-a", "--attr",
dest="attr", action="append",
default=env.get('NOSE_ATTR'),
metavar="ATTR",
help="Run only tests that have attributes "
"specified by ATTR [NOSE_ATTR]")
# disable in < 2.4: eval can't take needed args
if compat_24:
parser.add_option("-A", "--eval-attr",
dest="eval_attr", metavar="EXPR", action="append",
default=env.get('NOSE_EVAL_ATTR'),
help="Run only tests for whose attributes "
"the Python expression EXPR evaluates "
"to True [NOSE_EVAL_ATTR]")
def configure(self, options, config):
"""Configure the plugin and system, based on selected options.
attr and eval_attr may each be lists.
self.attribs will be a list of lists of tuples. In that list, each
list is a group of attributes, all of which must match for the rule to
match.
"""
self.attribs = []
# handle python eval-expression parameter
if compat_24 and options.eval_attr:
eval_attr = tolist(options.eval_attr)
for attr in eval_attr:
# "<python expression>"
# -> eval(expr) in attribute context must be True
def eval_in_context(expr, obj, cls):
return eval(expr, None, ContextHelper(obj, cls))
self.attribs.append([(attr, eval_in_context)])
# attribute requirements are a comma separated list of
# 'key=value' pairs
if options.attr:
std_attr = tolist(options.attr)
for attr in std_attr:
# all attributes within an attribute group must match
attr_group = []
for attrib in attr.strip().split(","):
# don't die on trailing comma
if not attrib:
continue
items = attrib.split("=", 1)
if len(items) > 1:
# "name=value"
# -> 'str(obj.name) == value' must be True
key, value = items
else:
key = items[0]
if key[0] == "!":
# "!name"
# 'bool(obj.name)' must be False
key = key[1:]
value = False
else:
# "name"
# -> 'bool(obj.name)' must be True
value = True
attr_group.append((key, value))
self.attribs.append(attr_group)
if self.attribs:
self.enabled = True
def validateAttrib(self, method, cls = None):
"""Verify whether a method has the required attributes
The method is considered a match if it matches all attributes
for any attribute group.
."""
# TODO: is there a need for case-sensitive value comparison?
any = False
for group in self.attribs:
match = True
for key, value in group:
attr = get_method_attr(method, cls, key)
if callable(value):
if not value(key, method, cls):
match = False
break
elif value is True:
# value must exist and be True
if not bool(attr):
match = False
break
elif value is False:
# value must not exist or be False
if bool(attr):
match = False
break
elif type(attr) in (list, tuple):
# value must be found in the list attribute
if not str(value).lower() in [str(x).lower()
for x in attr]:
match = False
break
else:
# value must match, convert to string and compare
if (value != attr
and str(value).lower() != str(attr).lower()):
match = False
break
any = any or match
if any:
# not True because we don't want to FORCE the selection of the
# item, only say that it is acceptable
return None
return False
def wantFunction(self, function):
"""Accept the function if its attributes match.
"""
return self.validateAttrib(function)
def wantMethod(self, method):
"""Accept the method if its attributes match.
"""
try:
cls = method.im_class
except AttributeError:
return False
return self.validateAttrib(method, cls)

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import os
import textwrap
from optparse import OptionConflictError
from warnings import warn
from nose.util import tolist
class Plugin(object):
"""Base class for nose plugins. It's recommended but not *necessary* to
subclass this class to create a plugin, but all plugins *must* implement
`options(self, parser, env)` and `configure(self, options, conf)`, and
must have the attributes `enabled`, `name` and `score`. The `name`
attribute may contain hyphens ('-').
Plugins should not be enabled by default.
Subclassing Plugin (and calling the superclass methods in
__init__, configure, and options, if you override them) will give
your plugin some friendly default behavior:
* A --with-$name option will be added to the command line interface
to enable the plugin, and a corresponding environment variable
will be used as the default value. The plugin class's docstring
will be used as the help for this option.
* The plugin will not be enabled unless this option is selected by
the user.
"""
can_configure = False
enabled = False
enableOpt = None
name = None
score = 100
def __init__(self):
if self.name is None:
self.name = self.__class__.__name__.lower()
if self.enableOpt is None:
self.enableOpt = "enable_plugin_%s" % self.name.replace('-', '_')
def addOptions(self, parser, env=None):
"""Add command-line options for this plugin.
The base plugin class adds --with-$name by default, used to enable the
plugin.
.. warning :: Don't implement addOptions unless you want to override
all default option handling behavior, including
warnings for conflicting options. Implement
:meth:`options
<nose.plugins.base.IPluginInterface.options>`
instead.
"""
self.add_options(parser, env)
def add_options(self, parser, env=None):
"""Non-camel-case version of func name for backwards compatibility.
.. warning ::
DEPRECATED: Do not use this method,
use :meth:`options <nose.plugins.base.IPluginInterface.options>`
instead.
"""
# FIXME raise deprecation warning if wasn't called by wrapper
if env is None:
env = os.environ
try:
self.options(parser, env)
self.can_configure = True
except OptionConflictError, e:
warn("Plugin %s has conflicting option string: %s and will "
"be disabled" % (self, e), RuntimeWarning)
self.enabled = False
self.can_configure = False
def options(self, parser, env):
"""Register commandline options.
Implement this method for normal options behavior with protection from
OptionConflictErrors. If you override this method and want the default
--with-$name option to be registered, be sure to call super().
"""
env_opt = 'NOSE_WITH_%s' % self.name.upper()
env_opt = env_opt.replace('-', '_')
parser.add_option("--with-%s" % self.name,
action="store_true",
dest=self.enableOpt,
default=env.get(env_opt),
help="Enable plugin %s: %s [%s]" %
(self.__class__.__name__, self.help(), env_opt))
def configure(self, options, conf):
"""Configure the plugin and system, based on selected options.
The base plugin class sets the plugin to enabled if the enable option
for the plugin (self.enableOpt) is true.
"""
if not self.can_configure:
return
self.conf = conf
if hasattr(options, self.enableOpt):
self.enabled = getattr(options, self.enableOpt)
def help(self):
"""Return help for this plugin. This will be output as the help
section of the --with-$name option that enables the plugin.
"""
if self.__class__.__doc__:
# doc sections are often indented; compress the spaces
return textwrap.dedent(self.__class__.__doc__)
return "(no help available)"
# Compatiblity shim
def tolist(self, val):
warn("Plugin.tolist is deprecated. Use nose.util.tolist instead",
DeprecationWarning)
return tolist(val)
class IPluginInterface(object):
"""
IPluginInterface describes the plugin API. Do not subclass or use this
class directly.
"""
def __new__(cls, *arg, **kw):
raise TypeError("IPluginInterface class is for documentation only")
def addOptions(self, parser, env):
"""Called to allow plugin to register command-line options with the
parser. DO NOT return a value from this method unless you want to stop
all other plugins from setting their options.
.. warning ::
DEPRECATED -- implement
:meth:`options <nose.plugins.base.IPluginInterface.options>` instead.
"""
pass
add_options = addOptions
add_options.deprecated = True
def addDeprecated(self, test):
"""Called when a deprecated test is seen. DO NOT return a value
unless you want to stop other plugins from seeing the deprecated
test.
.. warning :: DEPRECATED -- check error class in addError instead
"""
pass
addDeprecated.deprecated = True
def addError(self, test, err):
"""Called when a test raises an uncaught exception. DO NOT return a
value unless you want to stop other plugins from seeing that the
test has raised an error.
:param test: the test case
:type test: :class:`nose.case.Test`
:param err: sys.exc_info() tuple
:type err: 3-tuple
"""
pass
addError.changed = True
def addFailure(self, test, err):
"""Called when a test fails. DO NOT return a value unless you
want to stop other plugins from seeing that the test has failed.
:param test: the test case
:type test: :class:`nose.case.Test`
:param err: 3-tuple
:type err: sys.exc_info() tuple
"""
pass
addFailure.changed = True
def addSkip(self, test):
"""Called when a test is skipped. DO NOT return a value unless
you want to stop other plugins from seeing the skipped test.
.. warning:: DEPRECATED -- check error class in addError instead
"""
pass
addSkip.deprecated = True
def addSuccess(self, test):
"""Called when a test passes. DO NOT return a value unless you
want to stop other plugins from seeing the passing test.
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
addSuccess.changed = True
def afterContext(self):
"""Called after a context (generally a module) has been
lazy-loaded, imported, setup, had its tests loaded and
executed, and torn down.
"""
pass
afterContext._new = True
def afterDirectory(self, path):
"""Called after all tests have been loaded from directory at path
and run.
:param path: the directory that has finished processing
:type path: string
"""
pass
afterDirectory._new = True
def afterImport(self, filename, module):
"""Called after module is imported from filename. afterImport
is called even if the import failed.
:param filename: The file that was loaded
:type filename: string
:param module: The name of the module
:type module: string
"""
pass
afterImport._new = True
def afterTest(self, test):
"""Called after the test has been run and the result recorded
(after stopTest).
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
afterTest._new = True
def beforeContext(self):
"""Called before a context (generally a module) is
examined. Because the context is not yet loaded, plugins don't
get to know what the context is; so any context operations
should use a stack that is pushed in `beforeContext` and popped
in `afterContext` to ensure they operate symmetrically.
`beforeContext` and `afterContext` are mainly useful for tracking
and restoring global state around possible changes from within a
context, whatever the context may be. If you need to operate on
contexts themselves, see `startContext` and `stopContext`, which
are passed the context in question, but are called after
it has been loaded (imported in the module case).
"""
pass
beforeContext._new = True
def beforeDirectory(self, path):
"""Called before tests are loaded from directory at path.
:param path: the directory that is about to be processed
"""
pass
beforeDirectory._new = True
def beforeImport(self, filename, module):
"""Called before module is imported from filename.
:param filename: The file that will be loaded
:param module: The name of the module found in file
:type module: string
"""
beforeImport._new = True
def beforeTest(self, test):
"""Called before the test is run (before startTest).
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
beforeTest._new = True
def begin(self):
"""Called before any tests are collected or run. Use this to
perform any setup needed before testing begins.
"""
pass
def configure(self, options, conf):
"""Called after the command line has been parsed, with the
parsed options and the config container. Here, implement any
config storage or changes to state or operation that are set
by command line options.
DO NOT return a value from this method unless you want to
stop all other plugins from being configured.
"""
pass
def finalize(self, result):
"""Called after all report output, including output from all
plugins, has been sent to the stream. Use this to print final
test results or perform final cleanup. Return None to allow
other plugins to continue printing, or any other value to stop
them.
:param result: test result object
.. Note:: When tests are run under a test runner other than
:class:`nose.core.TextTestRunner`, such as
via ``python setup.py test``, this method may be called
**before** the default report output is sent.
"""
pass
def describeTest(self, test):
"""Return a test description.
Called by :meth:`nose.case.Test.shortDescription`.
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
describeTest._new = True
def formatError(self, test, err):
"""Called in result.addError, before plugin.addError. If you
want to replace or modify the error tuple, return a new error
tuple, otherwise return err, the original error tuple.
:param test: the test case
:type test: :class:`nose.case.Test`
:param err: sys.exc_info() tuple
:type err: 3-tuple
"""
pass
formatError._new = True
formatError.chainable = True
# test arg is not chainable
formatError.static_args = (True, False)
def formatFailure(self, test, err):
"""Called in result.addFailure, before plugin.addFailure. If you
want to replace or modify the error tuple, return a new error
tuple, otherwise return err, the original error tuple.
:param test: the test case
:type test: :class:`nose.case.Test`
:param err: sys.exc_info() tuple
:type err: 3-tuple
"""
pass
formatFailure._new = True
formatFailure.chainable = True
# test arg is not chainable
formatFailure.static_args = (True, False)
def handleError(self, test, err):
"""Called on addError. To handle the error yourself and prevent normal
error processing, return a true value.
:param test: the test case
:type test: :class:`nose.case.Test`
:param err: sys.exc_info() tuple
:type err: 3-tuple
"""
pass
handleError._new = True
def handleFailure(self, test, err):
"""Called on addFailure. To handle the failure yourself and
prevent normal failure processing, return a true value.
:param test: the test case
:type test: :class:`nose.case.Test`
:param err: sys.exc_info() tuple
:type err: 3-tuple
"""
pass
handleFailure._new = True
def loadTestsFromDir(self, path):
"""Return iterable of tests from a directory. May be a
generator. Each item returned must be a runnable
unittest.TestCase (or subclass) instance or suite instance.
Return None if your plugin cannot collect any tests from
directory.
:param path: The path to the directory.
"""
pass
loadTestsFromDir.generative = True
loadTestsFromDir._new = True
def loadTestsFromModule(self, module, path=None):
"""Return iterable of tests in a module. May be a
generator. Each item returned must be a runnable
unittest.TestCase (or subclass) instance.
Return None if your plugin cannot
collect any tests from module.
:param module: The module object
:type module: python module
:param path: the path of the module to search, to distinguish from
namespace package modules
.. note::
NEW. The ``path`` parameter will only be passed by nose 0.11
or above.
"""
pass
loadTestsFromModule.generative = True
def loadTestsFromName(self, name, module=None, importPath=None):
"""Return tests in this file or module. Return None if you are not able
to load any tests, or an iterable if you are. May be a
generator.
:param name: The test name. May be a file or module name plus a test
callable. Use split_test_name to split into parts. Or it might
be some crazy name of your own devising, in which case, do
whatever you want.
:param module: Module from which the name is to be loaded
:param importPath: Path from which file (must be a python module) was
found
.. warning:: DEPRECATED: this argument will NOT be passed.
"""
pass
loadTestsFromName.generative = True
def loadTestsFromNames(self, names, module=None):
"""Return a tuple of (tests loaded, remaining names). Return
None if you are not able to load any tests. Multiple plugins
may implement loadTestsFromNames; the remaining name list from
each will be passed to the next as input.
:param names: List of test names.
:type names: iterable
:param module: Module from which the names are to be loaded
"""
pass
loadTestsFromNames._new = True
loadTestsFromNames.chainable = True
def loadTestsFromFile(self, filename):
"""Return tests in this file. Return None if you are not
interested in loading any tests, or an iterable if you are and
can load some. May be a generator. *If you are interested in
loading tests from the file and encounter no errors, but find
no tests, yield False or return [False].*
.. Note:: This method replaces loadTestsFromPath from the 0.9
API.
:param filename: The full path to the file or directory.
"""
pass
loadTestsFromFile.generative = True
loadTestsFromFile._new = True
def loadTestsFromPath(self, path):
"""
.. warning:: DEPRECATED -- use loadTestsFromFile instead
"""
pass
loadTestsFromPath.deprecated = True
def loadTestsFromTestCase(self, cls):
"""Return tests in this test case class. Return None if you are
not able to load any tests, or an iterable if you are. May be a
generator.
:param cls: The test case class. Must be subclass of
:class:`unittest.TestCase`.
"""
pass
loadTestsFromTestCase.generative = True
def loadTestsFromTestClass(self, cls):
"""Return tests in this test class. Class will *not* be a
unittest.TestCase subclass. Return None if you are not able to
load any tests, an iterable if you are. May be a generator.
:param cls: The test case class. Must be **not** be subclass of
:class:`unittest.TestCase`.
"""
pass
loadTestsFromTestClass._new = True
loadTestsFromTestClass.generative = True
def makeTest(self, obj, parent):
"""Given an object and its parent, return or yield one or more
test cases. Each test must be a unittest.TestCase (or subclass)
instance. This is called before default test loading to allow
plugins to load an alternate test case or cases for an
object. May be a generator.
:param obj: The object to be made into a test
:param parent: The parent of obj (eg, for a method, the class)
"""
pass
makeTest._new = True
makeTest.generative = True
def options(self, parser, env):
"""Called to allow plugin to register command line
options with the parser.
DO NOT return a value from this method unless you want to stop
all other plugins from setting their options.
:param parser: options parser instance
:type parser: :class:`ConfigParser.ConfigParser`
:param env: environment, default is os.environ
"""
pass
options._new = True
def prepareTest(self, test):
"""Called before the test is run by the test runner. Please
note the article *the* in the previous sentence: prepareTest
is called *only once*, and is passed the test case or test
suite that the test runner will execute. It is *not* called
for each individual test case. If you return a non-None value,
that return value will be run as the test. Use this hook to
wrap or decorate the test with another function. If you need
to modify or wrap individual test cases, use `prepareTestCase`
instead.
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
def prepareTestCase(self, test):
"""Prepare or wrap an individual test case. Called before
execution of the test. The test passed here is a
nose.case.Test instance; the case to be executed is in the
test attribute of the passed case. To modify the test to be
run, you should return a callable that takes one argument (the
test result object) -- it is recommended that you *do not*
side-effect the nose.case.Test instance you have been passed.
Keep in mind that when you replace the test callable you are
replacing the run() method of the test case -- including the
exception handling and result calls, etc.
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
prepareTestCase._new = True
def prepareTestLoader(self, loader):
"""Called before tests are loaded. To replace the test loader,
return a test loader. To allow other plugins to process the
test loader, return None. Only one plugin may replace the test
loader. Only valid when using nose.TestProgram.
:param loader: :class:`nose.loader.TestLoader`
(or other loader) instance
"""
pass
prepareTestLoader._new = True
def prepareTestResult(self, result):
"""Called before the first test is run. To use a different
test result handler for all tests than the given result,
return a test result handler. NOTE however that this handler
will only be seen by tests, that is, inside of the result
proxy system. The TestRunner and TestProgram -- whether nose's
or other -- will continue to see the original result
handler. For this reason, it is usually better to monkeypatch
the result (for instance, if you want to handle some
exceptions in a unique way). Only one plugin may replace the
result, but many may monkeypatch it. If you want to
monkeypatch and stop other plugins from doing so, monkeypatch
and return the patched result.
:param result: :class:`nose.result.TextTestResult`
(or other result) instance
"""
pass
prepareTestResult._new = True
def prepareTestRunner(self, runner):
"""Called before tests are run. To replace the test runner,
return a test runner. To allow other plugins to process the
test runner, return None. Only valid when using nose.TestProgram.
:param runner: :class:`nose.core.TextTestRunner`
(or other runner) instance
"""
pass
prepareTestRunner._new = True
def report(self, stream):
"""Called after all error output has been printed. Print your
plugin's report to the provided stream. Return None to allow
other plugins to print reports, any other value to stop them.
:param stream: stream object; send your output here
:type stream: file-like object
"""
pass
def setOutputStream(self, stream):
"""Called before test output begins. To direct test output to a
new stream, return a stream object, which must implement a
`write(msg)` method. If you only want to note the stream, not
capture or redirect it, then return None.
:param stream: stream object; send your output here
:type stream: file-like object
"""
def startContext(self, context):
"""Called before context setup and the running of tests in the
context. Note that tests have already been *loaded* from the
context before this call.
:param context: the context about to be setup. May be a module or
class, or any other object that contains tests.
"""
pass
startContext._new = True
def startTest(self, test):
"""Called before each test is run. DO NOT return a value unless
you want to stop other plugins from seeing the test start.
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
def stopContext(self, context):
"""Called after the tests in a context have run and the
context has been torn down.
:param context: the context that has been torn down. May be a module or
class, or any other object that contains tests.
"""
pass
stopContext._new = True
def stopTest(self, test):
"""Called after each test is run. DO NOT return a value unless
you want to stop other plugins from seeing that the test has stopped.
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
def testName(self, test):
"""Return a short test name. Called by `nose.case.Test.__str__`.
:param test: the test case
:type test: :class:`nose.case.Test`
"""
pass
testName._new = True
def wantClass(self, cls):
"""Return true if you want the main test selector to collect
tests from this class, false if you don't, and None if you don't
care.
:param cls: The class being examined by the selector
"""
pass
def wantDirectory(self, dirname):
"""Return true if you want test collection to descend into this
directory, false if you do not, and None if you don't care.
:param dirname: Full path to directory being examined by the selector
"""
pass
def wantFile(self, file):
"""Return true if you want to collect tests from this file,
false if you do not and None if you don't care.
Change from 0.9: The optional package parameter is no longer passed.
:param file: Full path to file being examined by the selector
"""
pass
def wantFunction(self, function):
"""Return true to collect this function as a test, false to
prevent it from being collected, and None if you don't care.
:param function: The function object being examined by the selector
"""
pass
def wantMethod(self, method):
"""Return true to collect this method as a test, false to
prevent it from being collected, and None if you don't care.
:param method: The method object being examined by the selector
:type method: unbound method
"""
pass
def wantModule(self, module):
"""Return true if you want to collection to descend into this
module, false to prevent the collector from descending into the
module, and None if you don't care.
:param module: The module object being examined by the selector
:type module: python module
"""
pass
def wantModuleTests(self, module):
"""
.. warning:: DEPRECATED -- this method will not be called, it has
been folded into wantModule.
"""
pass
wantModuleTests.deprecated = True

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lib/spack/external/nose/plugins/builtin.py vendored Normal file
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"""
Lists builtin plugins.
"""
plugins = []
builtins = (
('nose.plugins.attrib', 'AttributeSelector'),
('nose.plugins.capture', 'Capture'),
('nose.plugins.logcapture', 'LogCapture'),
('nose.plugins.cover', 'Coverage'),
('nose.plugins.debug', 'Pdb'),
('nose.plugins.deprecated', 'Deprecated'),
('nose.plugins.doctests', 'Doctest'),
('nose.plugins.isolate', 'IsolationPlugin'),
('nose.plugins.failuredetail', 'FailureDetail'),
('nose.plugins.prof', 'Profile'),
('nose.plugins.skip', 'Skip'),
('nose.plugins.testid', 'TestId'),
('nose.plugins.multiprocess', 'MultiProcess'),
('nose.plugins.xunit', 'Xunit'),
('nose.plugins.allmodules', 'AllModules'),
('nose.plugins.collect', 'CollectOnly'),
)
for module, cls in builtins:
try:
plugmod = __import__(module, globals(), locals(), [cls])
except KeyboardInterrupt:
raise
except:
continue
plug = getattr(plugmod, cls)
plugins.append(plug)
globals()[cls] = plug

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"""
This plugin captures stdout during test execution. If the test fails
or raises an error, the captured output will be appended to the error
or failure output. It is enabled by default but can be disabled with
the options ``-s`` or ``--nocapture``.
:Options:
``--nocapture``
Don't capture stdout (any stdout output will be printed immediately)
"""
import logging
import os
import sys
from nose.plugins.base import Plugin
from nose.pyversion import exc_to_unicode, force_unicode
from nose.util import ln
from StringIO import StringIO
log = logging.getLogger(__name__)
class Capture(Plugin):
"""
Output capture plugin. Enabled by default. Disable with ``-s`` or
``--nocapture``. This plugin captures stdout during test execution,
appending any output captured to the error or failure output,
should the test fail or raise an error.
"""
enabled = True
env_opt = 'NOSE_NOCAPTURE'
name = 'capture'
score = 1600
def __init__(self):
self.stdout = []
self._buf = None
def options(self, parser, env):
"""Register commandline options
"""
parser.add_option(
"-s", "--nocapture", action="store_false",
default=not env.get(self.env_opt), dest="capture",
help="Don't capture stdout (any stdout output "
"will be printed immediately) [NOSE_NOCAPTURE]")
def configure(self, options, conf):
"""Configure plugin. Plugin is enabled by default.
"""
self.conf = conf
if not options.capture:
self.enabled = False
def afterTest(self, test):
"""Clear capture buffer.
"""
self.end()
self._buf = None
def begin(self):
"""Replace sys.stdout with capture buffer.
"""
self.start() # get an early handle on sys.stdout
def beforeTest(self, test):
"""Flush capture buffer.
"""
self.start()
def formatError(self, test, err):
"""Add captured output to error report.
"""
test.capturedOutput = output = self.buffer
self._buf = None
if not output:
# Don't return None as that will prevent other
# formatters from formatting and remove earlier formatters
# formats, instead return the err we got
return err
ec, ev, tb = err
return (ec, self.addCaptureToErr(ev, output), tb)
def formatFailure(self, test, err):
"""Add captured output to failure report.
"""
return self.formatError(test, err)
def addCaptureToErr(self, ev, output):
ev = exc_to_unicode(ev)
output = force_unicode(output)
return u'\n'.join([ev, ln(u'>> begin captured stdout <<'),
output, ln(u'>> end captured stdout <<')])
def start(self):
self.stdout.append(sys.stdout)
self._buf = StringIO()
sys.stdout = self._buf
def end(self):
if self.stdout:
sys.stdout = self.stdout.pop()
def finalize(self, result):
"""Restore stdout.
"""
while self.stdout:
self.end()
def _get_buffer(self):
if self._buf is not None:
return self._buf.getvalue()
buffer = property(_get_buffer, None, None,
"""Captured stdout output.""")

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"""
This plugin bypasses the actual execution of tests, and instead just collects
test names. Fixtures are also bypassed, so running nosetests with the
collection plugin enabled should be very quick.
This plugin is useful in combination with the testid plugin (``--with-id``).
Run both together to get an indexed list of all tests, which will enable you to
run individual tests by index number.
This plugin is also useful for counting tests in a test suite, and making
people watching your demo think all of your tests pass.
"""
from nose.plugins.base import Plugin
from nose.case import Test
import logging
import unittest
log = logging.getLogger(__name__)
class CollectOnly(Plugin):
"""
Collect and output test names only, don't run any tests.
"""
name = "collect-only"
enableOpt = 'collect_only'
def options(self, parser, env):
"""Register commandline options.
"""
parser.add_option('--collect-only',
action='store_true',
dest=self.enableOpt,
default=env.get('NOSE_COLLECT_ONLY'),
help="Enable collect-only: %s [COLLECT_ONLY]" %
(self.help()))
def prepareTestLoader(self, loader):
"""Install collect-only suite class in TestLoader.
"""
# Disable context awareness
log.debug("Preparing test loader")
loader.suiteClass = TestSuiteFactory(self.conf)
def prepareTestCase(self, test):
"""Replace actual test with dummy that always passes.
"""
# Return something that always passes
log.debug("Preparing test case %s", test)
if not isinstance(test, Test):
return
def run(result):
# We need to make these plugin calls because there won't be
# a result proxy, due to using a stripped-down test suite
self.conf.plugins.startTest(test)
result.startTest(test)
self.conf.plugins.addSuccess(test)
result.addSuccess(test)
self.conf.plugins.stopTest(test)
result.stopTest(test)
return run
class TestSuiteFactory:
"""
Factory for producing configured test suites.
"""
def __init__(self, conf):
self.conf = conf
def __call__(self, tests=(), **kw):
return TestSuite(tests, conf=self.conf)
class TestSuite(unittest.TestSuite):
"""
Basic test suite that bypasses most proxy and plugin calls, but does
wrap tests in a nose.case.Test so prepareTestCase will be called.
"""
def __init__(self, tests=(), conf=None):
self.conf = conf
# Exec lazy suites: makes discovery depth-first
if callable(tests):
tests = tests()
log.debug("TestSuite(%r)", tests)
unittest.TestSuite.__init__(self, tests)
def addTest(self, test):
log.debug("Add test %s", test)
if isinstance(test, unittest.TestSuite):
self._tests.append(test)
else:
self._tests.append(Test(test, config=self.conf))

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"""If you have Ned Batchelder's coverage_ module installed, you may activate a
coverage report with the ``--with-coverage`` switch or NOSE_WITH_COVERAGE
environment variable. The coverage report will cover any python source module
imported after the start of the test run, excluding modules that match
testMatch. If you want to include those modules too, use the ``--cover-tests``
switch, or set the NOSE_COVER_TESTS environment variable to a true value. To
restrict the coverage report to modules from a particular package or packages,
use the ``--cover-package`` switch or the NOSE_COVER_PACKAGE environment
variable.
.. _coverage: http://www.nedbatchelder.com/code/modules/coverage.html
"""
import logging
import re
import sys
import StringIO
from nose.plugins.base import Plugin
from nose.util import src, tolist
log = logging.getLogger(__name__)
class Coverage(Plugin):
"""
Activate a coverage report using Ned Batchelder's coverage module.
"""
coverTests = False
coverPackages = None
coverInstance = None
coverErase = False
coverMinPercentage = None
score = 200
status = {}
def options(self, parser, env):
"""
Add options to command line.
"""
super(Coverage, self).options(parser, env)
parser.add_option("--cover-package", action="append",
default=env.get('NOSE_COVER_PACKAGE'),
metavar="PACKAGE",
dest="cover_packages",
help="Restrict coverage output to selected packages "
"[NOSE_COVER_PACKAGE]")
parser.add_option("--cover-erase", action="store_true",
default=env.get('NOSE_COVER_ERASE'),
dest="cover_erase",
help="Erase previously collected coverage "
"statistics before run")
parser.add_option("--cover-tests", action="store_true",
dest="cover_tests",
default=env.get('NOSE_COVER_TESTS'),
help="Include test modules in coverage report "
"[NOSE_COVER_TESTS]")
parser.add_option("--cover-min-percentage", action="store",
dest="cover_min_percentage",
default=env.get('NOSE_COVER_MIN_PERCENTAGE'),
help="Minimum percentage of coverage for tests "
"to pass [NOSE_COVER_MIN_PERCENTAGE]")
parser.add_option("--cover-inclusive", action="store_true",
dest="cover_inclusive",
default=env.get('NOSE_COVER_INCLUSIVE'),
help="Include all python files under working "
"directory in coverage report. Useful for "
"discovering holes in test coverage if not all "
"files are imported by the test suite. "
"[NOSE_COVER_INCLUSIVE]")
parser.add_option("--cover-html", action="store_true",
default=env.get('NOSE_COVER_HTML'),
dest='cover_html',
help="Produce HTML coverage information")
parser.add_option('--cover-html-dir', action='store',
default=env.get('NOSE_COVER_HTML_DIR', 'cover'),
dest='cover_html_dir',
metavar='DIR',
help='Produce HTML coverage information in dir')
parser.add_option("--cover-branches", action="store_true",
default=env.get('NOSE_COVER_BRANCHES'),
dest="cover_branches",
help="Include branch coverage in coverage report "
"[NOSE_COVER_BRANCHES]")
parser.add_option("--cover-xml", action="store_true",
default=env.get('NOSE_COVER_XML'),
dest="cover_xml",
help="Produce XML coverage information")
parser.add_option("--cover-xml-file", action="store",
default=env.get('NOSE_COVER_XML_FILE', 'coverage.xml'),
dest="cover_xml_file",
metavar="FILE",
help="Produce XML coverage information in file")
def configure(self, options, conf):
"""
Configure plugin.
"""
try:
self.status.pop('active')
except KeyError:
pass
super(Coverage, self).configure(options, conf)
if self.enabled:
try:
import coverage
if not hasattr(coverage, 'coverage'):
raise ImportError("Unable to import coverage module")
except ImportError:
log.error("Coverage not available: "
"unable to import coverage module")
self.enabled = False
return
self.conf = conf
self.coverErase = options.cover_erase
self.coverTests = options.cover_tests
self.coverPackages = []
if options.cover_packages:
if isinstance(options.cover_packages, (list, tuple)):
cover_packages = options.cover_packages
else:
cover_packages = [options.cover_packages]
for pkgs in [tolist(x) for x in cover_packages]:
self.coverPackages.extend(pkgs)
self.coverInclusive = options.cover_inclusive
if self.coverPackages:
log.info("Coverage report will include only packages: %s",
self.coverPackages)
self.coverHtmlDir = None
if options.cover_html:
self.coverHtmlDir = options.cover_html_dir
log.debug('Will put HTML coverage report in %s', self.coverHtmlDir)
self.coverBranches = options.cover_branches
self.coverXmlFile = None
if options.cover_min_percentage:
self.coverMinPercentage = int(options.cover_min_percentage.rstrip('%'))
if options.cover_xml:
self.coverXmlFile = options.cover_xml_file
log.debug('Will put XML coverage report in %s', self.coverXmlFile)
if self.enabled:
self.status['active'] = True
self.coverInstance = coverage.coverage(auto_data=False,
branch=self.coverBranches, data_suffix=conf.worker,
source=self.coverPackages)
self.coverInstance._warn_no_data = False
self.coverInstance.is_worker = conf.worker
self.coverInstance.exclude('#pragma[: ]+[nN][oO] [cC][oO][vV][eE][rR]')
log.debug("Coverage begin")
self.skipModules = sys.modules.keys()[:]
if self.coverErase:
log.debug("Clearing previously collected coverage statistics")
self.coverInstance.combine()
self.coverInstance.erase()
if not self.coverInstance.is_worker:
self.coverInstance.load()
self.coverInstance.start()
def beforeTest(self, *args, **kwargs):
"""
Begin recording coverage information.
"""
if self.coverInstance.is_worker:
self.coverInstance.load()
self.coverInstance.start()
def afterTest(self, *args, **kwargs):
"""
Stop recording coverage information.
"""
if self.coverInstance.is_worker:
self.coverInstance.stop()
self.coverInstance.save()
def report(self, stream):
"""
Output code coverage report.
"""
log.debug("Coverage report")
self.coverInstance.stop()
self.coverInstance.combine()
self.coverInstance.save()
modules = [module
for name, module in sys.modules.items()
if self.wantModuleCoverage(name, module)]
log.debug("Coverage report will cover modules: %s", modules)
self.coverInstance.report(modules, file=stream)
import coverage
if self.coverHtmlDir:
log.debug("Generating HTML coverage report")
try:
self.coverInstance.html_report(modules, self.coverHtmlDir)
except coverage.misc.CoverageException, e:
log.warning("Failed to generate HTML report: %s" % str(e))
if self.coverXmlFile:
log.debug("Generating XML coverage report")
try:
self.coverInstance.xml_report(modules, self.coverXmlFile)
except coverage.misc.CoverageException, e:
log.warning("Failed to generate XML report: %s" % str(e))
# make sure we have minimum required coverage
if self.coverMinPercentage:
f = StringIO.StringIO()
self.coverInstance.report(modules, file=f)
multiPackageRe = (r'-------\s\w+\s+\d+\s+\d+(?:\s+\d+\s+\d+)?'
r'\s+(\d+)%\s+\d*\s{0,1}$')
singlePackageRe = (r'-------\s[\w./]+\s+\d+\s+\d+(?:\s+\d+\s+\d+)?'
r'\s+(\d+)%(?:\s+[-\d, ]+)\s{0,1}$')
m = re.search(multiPackageRe, f.getvalue())
if m is None:
m = re.search(singlePackageRe, f.getvalue())
if m:
percentage = int(m.groups()[0])
if percentage < self.coverMinPercentage:
log.error('TOTAL Coverage did not reach minimum '
'required: %d%%' % self.coverMinPercentage)
sys.exit(1)
else:
log.error("No total percentage was found in coverage output, "
"something went wrong.")
def wantModuleCoverage(self, name, module):
if not hasattr(module, '__file__'):
log.debug("no coverage of %s: no __file__", name)
return False
module_file = src(module.__file__)
if not module_file or not module_file.endswith('.py'):
log.debug("no coverage of %s: not a python file", name)
return False
if self.coverPackages:
for package in self.coverPackages:
if (re.findall(r'^%s\b' % re.escape(package), name)
and (self.coverTests
or not self.conf.testMatch.search(name))):
log.debug("coverage for %s", name)
return True
if name in self.skipModules:
log.debug("no coverage for %s: loaded before coverage start",
name)
return False
if self.conf.testMatch.search(name) and not self.coverTests:
log.debug("no coverage for %s: is a test", name)
return False
# accept any package that passed the previous tests, unless
# coverPackages is on -- in that case, if we wanted this
# module, we would have already returned True
return not self.coverPackages
def wantFile(self, file, package=None):
"""If inclusive coverage enabled, return true for all source files
in wanted packages.
"""
if self.coverInclusive:
if file.endswith(".py"):
if package and self.coverPackages:
for want in self.coverPackages:
if package.startswith(want):
return True
else:
return True
return None

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"""
This plugin provides ``--pdb`` and ``--pdb-failures`` options. The ``--pdb``
option will drop the test runner into pdb when it encounters an error. To
drop into pdb on failure, use ``--pdb-failures``.
"""
import pdb
from nose.plugins.base import Plugin
class Pdb(Plugin):
"""
Provides --pdb and --pdb-failures options that cause the test runner to
drop into pdb if it encounters an error or failure, respectively.
"""
enabled_for_errors = False
enabled_for_failures = False
score = 5 # run last, among builtins
def options(self, parser, env):
"""Register commandline options.
"""
parser.add_option(
"--pdb", action="store_true", dest="debugBoth",
default=env.get('NOSE_PDB', False),
help="Drop into debugger on failures or errors")
parser.add_option(
"--pdb-failures", action="store_true",
dest="debugFailures",
default=env.get('NOSE_PDB_FAILURES', False),
help="Drop into debugger on failures")
parser.add_option(
"--pdb-errors", action="store_true",
dest="debugErrors",
default=env.get('NOSE_PDB_ERRORS', False),
help="Drop into debugger on errors")
def configure(self, options, conf):
"""Configure which kinds of exceptions trigger plugin.
"""
self.conf = conf
self.enabled_for_errors = options.debugErrors or options.debugBoth
self.enabled_for_failures = options.debugFailures or options.debugBoth
self.enabled = self.enabled_for_failures or self.enabled_for_errors
def addError(self, test, err):
"""Enter pdb if configured to debug errors.
"""
if not self.enabled_for_errors:
return
self.debug(err)
def addFailure(self, test, err):
"""Enter pdb if configured to debug failures.
"""
if not self.enabled_for_failures:
return
self.debug(err)
def debug(self, err):
import sys # FIXME why is this import here?
ec, ev, tb = err
stdout = sys.stdout
sys.stdout = sys.__stdout__
try:
pdb.post_mortem(tb)
finally:
sys.stdout = stdout

45
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"""
This plugin installs a DEPRECATED error class for the :class:`DeprecatedTest`
exception. When :class:`DeprecatedTest` is raised, the exception will be logged
in the deprecated attribute of the result, ``D`` or ``DEPRECATED`` (verbose)
will be output, and the exception will not be counted as an error or failure.
It is enabled by default, but can be turned off by using ``--no-deprecated``.
"""
from nose.plugins.errorclass import ErrorClass, ErrorClassPlugin
class DeprecatedTest(Exception):
"""Raise this exception to mark a test as deprecated.
"""
pass
class Deprecated(ErrorClassPlugin):
"""
Installs a DEPRECATED error class for the DeprecatedTest exception. Enabled
by default.
"""
enabled = True
deprecated = ErrorClass(DeprecatedTest,
label='DEPRECATED',
isfailure=False)
def options(self, parser, env):
"""Register commandline options.
"""
env_opt = 'NOSE_WITHOUT_DEPRECATED'
parser.add_option('--no-deprecated', action='store_true',
dest='noDeprecated', default=env.get(env_opt, False),
help="Disable special handling of DeprecatedTest "
"exceptions.")
def configure(self, options, conf):
"""Configure plugin.
"""
if not self.can_configure:
return
self.conf = conf
disable = getattr(options, 'noDeprecated', False)
if disable:
self.enabled = False

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"""Use the Doctest plugin with ``--with-doctest`` or the NOSE_WITH_DOCTEST
environment variable to enable collection and execution of :mod:`doctests
<doctest>`. Because doctests are usually included in the tested package
(instead of being grouped into packages or modules of their own), nose only
looks for them in the non-test packages it discovers in the working directory.
Doctests may also be placed into files other than python modules, in which
case they can be collected and executed by using the ``--doctest-extension``
switch or NOSE_DOCTEST_EXTENSION environment variable to indicate which file
extension(s) to load.
When loading doctests from non-module files, use the ``--doctest-fixtures``
switch to specify how to find modules containing fixtures for the tests. A
module name will be produced by appending the value of that switch to the base
name of each doctest file loaded. For example, a doctest file "widgets.rst"
with the switch ``--doctest_fixtures=_fixt`` will load fixtures from the module
``widgets_fixt.py``.
A fixtures module may define any or all of the following functions:
* setup([module]) or setup_module([module])
Called before the test runs. You may raise SkipTest to skip all tests.
* teardown([module]) or teardown_module([module])
Called after the test runs, if setup/setup_module did not raise an
unhandled exception.
* setup_test(test)
Called before the test. NOTE: the argument passed is a
doctest.DocTest instance, *not* a unittest.TestCase.
* teardown_test(test)
Called after the test, if setup_test did not raise an exception. NOTE: the
argument passed is a doctest.DocTest instance, *not* a unittest.TestCase.
Doctests are run like any other test, with the exception that output
capture does not work; doctest does its own output capture while running a
test.
.. note ::
See :doc:`../doc_tests/test_doctest_fixtures/doctest_fixtures` for
additional documentation and examples.
"""
from __future__ import generators
import logging
import os
import sys
import unittest
from inspect import getmodule
from nose.plugins.base import Plugin
from nose.suite import ContextList
from nose.util import anyp, getpackage, test_address, resolve_name, \
src, tolist, isproperty
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
import sys
import __builtin__ as builtin_mod
log = logging.getLogger(__name__)
try:
import doctest
doctest.DocTestCase
# system version of doctest is acceptable, but needs a monkeypatch
except (ImportError, AttributeError):
# system version is too old
import nose.ext.dtcompat as doctest
#
# Doctest and coverage don't get along, so we need to create
# a monkeypatch that will replace the part of doctest that
# interferes with coverage reports.
#
# The monkeypatch is based on this zope patch:
# http://svn.zope.org/Zope3/trunk/src/zope/testing/doctest.py?rev=28679&r1=28703&r2=28705
#
_orp = doctest._OutputRedirectingPdb
class NoseOutputRedirectingPdb(_orp):
def __init__(self, out):
self.__debugger_used = False
_orp.__init__(self, out)
def set_trace(self):
self.__debugger_used = True
_orp.set_trace(self, sys._getframe().f_back)
def set_continue(self):
# Calling set_continue unconditionally would break unit test
# coverage reporting, as Bdb.set_continue calls sys.settrace(None).
if self.__debugger_used:
_orp.set_continue(self)
doctest._OutputRedirectingPdb = NoseOutputRedirectingPdb
class DoctestSuite(unittest.TestSuite):
"""
Doctest suites are parallelizable at the module or file level only,
since they may be attached to objects that are not individually
addressable (like properties). This suite subclass is used when
loading doctests from a module to ensure that behavior.
This class is used only if the plugin is not fully prepared;
in normal use, the loader's suiteClass is used.
"""
can_split = False
def __init__(self, tests=(), context=None, can_split=False):
self.context = context
self.can_split = can_split
unittest.TestSuite.__init__(self, tests=tests)
def address(self):
return test_address(self.context)
def __iter__(self):
# 2.3 compat
return iter(self._tests)
def __str__(self):
return str(self._tests)
class Doctest(Plugin):
"""
Activate doctest plugin to find and run doctests in non-test modules.
"""
extension = None
suiteClass = DoctestSuite
def options(self, parser, env):
"""Register commmandline options.
"""
Plugin.options(self, parser, env)
parser.add_option('--doctest-tests', action='store_true',
dest='doctest_tests',
default=env.get('NOSE_DOCTEST_TESTS'),
help="Also look for doctests in test modules. "
"Note that classes, methods and functions should "
"have either doctests or non-doctest tests, "
"not both. [NOSE_DOCTEST_TESTS]")
parser.add_option('--doctest-extension', action="append",
dest="doctestExtension",
metavar="EXT",
help="Also look for doctests in files with "
"this extension [NOSE_DOCTEST_EXTENSION]")
parser.add_option('--doctest-result-variable',
dest='doctest_result_var',
default=env.get('NOSE_DOCTEST_RESULT_VAR'),
metavar="VAR",
help="Change the variable name set to the result of "
"the last interpreter command from the default '_'. "
"Can be used to avoid conflicts with the _() "
"function used for text translation. "
"[NOSE_DOCTEST_RESULT_VAR]")
parser.add_option('--doctest-fixtures', action="store",
dest="doctestFixtures",
metavar="SUFFIX",
help="Find fixtures for a doctest file in module "
"with this name appended to the base name "
"of the doctest file")
parser.add_option('--doctest-options', action="append",
dest="doctestOptions",
metavar="OPTIONS",
help="Specify options to pass to doctest. " +
"Eg. '+ELLIPSIS,+NORMALIZE_WHITESPACE'")
# Set the default as a list, if given in env; otherwise
# an additional value set on the command line will cause
# an error.
env_setting = env.get('NOSE_DOCTEST_EXTENSION')
if env_setting is not None:
parser.set_defaults(doctestExtension=tolist(env_setting))
def configure(self, options, config):
"""Configure plugin.
"""
Plugin.configure(self, options, config)
self.doctest_result_var = options.doctest_result_var
self.doctest_tests = options.doctest_tests
self.extension = tolist(options.doctestExtension)
self.fixtures = options.doctestFixtures
self.finder = doctest.DocTestFinder()
self.optionflags = 0
if options.doctestOptions:
flags = ",".join(options.doctestOptions).split(',')
for flag in flags:
if not flag or flag[0] not in '+-':
raise ValueError(
"Must specify doctest options with starting " +
"'+' or '-'. Got %s" % (flag,))
mode, option_name = flag[0], flag[1:]
option_flag = doctest.OPTIONFLAGS_BY_NAME.get(option_name)
if not option_flag:
raise ValueError("Unknown doctest option %s" %
(option_name,))
if mode == '+':
self.optionflags |= option_flag
elif mode == '-':
self.optionflags &= ~option_flag
def prepareTestLoader(self, loader):
"""Capture loader's suiteClass.
This is used to create test suites from doctest files.
"""
self.suiteClass = loader.suiteClass
def loadTestsFromModule(self, module):
"""Load doctests from the module.
"""
log.debug("loading from %s", module)
if not self.matches(module.__name__):
log.debug("Doctest doesn't want module %s", module)
return
try:
tests = self.finder.find(module)
except AttributeError:
log.exception("Attribute error loading from %s", module)
# nose allows module.__test__ = False; doctest does not and throws
# AttributeError
return
if not tests:
log.debug("No tests found in %s", module)
return
tests.sort()
module_file = src(module.__file__)
# FIXME this breaks the id plugin somehow (tests probably don't
# get wrapped in result proxy or something)
cases = []
for test in tests:
if not test.examples:
continue
if not test.filename:
test.filename = module_file
cases.append(DocTestCase(test,
optionflags=self.optionflags,
result_var=self.doctest_result_var))
if cases:
yield self.suiteClass(cases, context=module, can_split=False)
def loadTestsFromFile(self, filename):
"""Load doctests from the file.
Tests are loaded only if filename's extension matches
configured doctest extension.
"""
if self.extension and anyp(filename.endswith, self.extension):
name = os.path.basename(filename)
dh = open(filename)
try:
doc = dh.read()
finally:
dh.close()
fixture_context = None
globs = {'__file__': filename}
if self.fixtures:
base, ext = os.path.splitext(name)
dirname = os.path.dirname(filename)
sys.path.append(dirname)
fixt_mod = base + self.fixtures
try:
fixture_context = __import__(
fixt_mod, globals(), locals(), ["nop"])
except ImportError, e:
log.debug(
"Could not import %s: %s (%s)", fixt_mod, e, sys.path)
log.debug("Fixture module %s resolved to %s",
fixt_mod, fixture_context)
if hasattr(fixture_context, 'globs'):
globs = fixture_context.globs(globs)
parser = doctest.DocTestParser()
test = parser.get_doctest(
doc, globs=globs, name=name,
filename=filename, lineno=0)
if test.examples:
case = DocFileCase(
test,
optionflags=self.optionflags,
setUp=getattr(fixture_context, 'setup_test', None),
tearDown=getattr(fixture_context, 'teardown_test', None),
result_var=self.doctest_result_var)
if fixture_context:
yield ContextList((case,), context=fixture_context)
else:
yield case
else:
yield False # no tests to load
def makeTest(self, obj, parent):
"""Look for doctests in the given object, which will be a
function, method or class.
"""
name = getattr(obj, '__name__', 'Unnammed %s' % type(obj))
doctests = self.finder.find(obj, module=getmodule(parent), name=name)
if doctests:
for test in doctests:
if len(test.examples) == 0:
continue
yield DocTestCase(test, obj=obj, optionflags=self.optionflags,
result_var=self.doctest_result_var)
def matches(self, name):
# FIXME this seems wrong -- nothing is ever going to
# fail this test, since we're given a module NAME not FILE
if name == '__init__.py':
return False
# FIXME don't think we need include/exclude checks here?
return ((self.doctest_tests or not self.conf.testMatch.search(name)
or (self.conf.include
and filter(None,
[inc.search(name)
for inc in self.conf.include])))
and (not self.conf.exclude
or not filter(None,
[exc.search(name)
for exc in self.conf.exclude])))
def wantFile(self, file):
"""Override to select all modules and any file ending with
configured doctest extension.
"""
# always want .py files
if file.endswith('.py'):
return True
# also want files that match my extension
if (self.extension
and anyp(file.endswith, self.extension)
and (not self.conf.exclude
or not filter(None,
[exc.search(file)
for exc in self.conf.exclude]))):
return True
return None
class DocTestCase(doctest.DocTestCase):
"""Overrides DocTestCase to
provide an address() method that returns the correct address for
the doctest case. To provide hints for address(), an obj may also
be passed -- this will be used as the test object for purposes of
determining the test address, if it is provided.
"""
def __init__(self, test, optionflags=0, setUp=None, tearDown=None,
checker=None, obj=None, result_var='_'):
self._result_var = result_var
self._nose_obj = obj
super(DocTestCase, self).__init__(
test, optionflags=optionflags, setUp=setUp, tearDown=tearDown,
checker=checker)
def address(self):
if self._nose_obj is not None:
return test_address(self._nose_obj)
obj = resolve_name(self._dt_test.name)
if isproperty(obj):
# properties have no connection to the class they are in
# so we can't just look 'em up, we have to first look up
# the class, then stick the prop on the end
parts = self._dt_test.name.split('.')
class_name = '.'.join(parts[:-1])
cls = resolve_name(class_name)
base_addr = test_address(cls)
return (base_addr[0], base_addr[1],
'.'.join([base_addr[2], parts[-1]]))
else:
return test_address(obj)
# doctests loaded via find(obj) omit the module name
# so we need to override id, __repr__ and shortDescription
# bonus: this will squash a 2.3 vs 2.4 incompatiblity
def id(self):
name = self._dt_test.name
filename = self._dt_test.filename
if filename is not None:
pk = getpackage(filename)
if pk is None:
return name
if not name.startswith(pk):
name = "%s.%s" % (pk, name)
return name
def __repr__(self):
name = self.id()
name = name.split('.')
return "%s (%s)" % (name[-1], '.'.join(name[:-1]))
__str__ = __repr__
def shortDescription(self):
return 'Doctest: %s' % self.id()
def setUp(self):
if self._result_var is not None:
self._old_displayhook = sys.displayhook
sys.displayhook = self._displayhook
super(DocTestCase, self).setUp()
def _displayhook(self, value):
if value is None:
return
setattr(builtin_mod, self._result_var, value)
print repr(value)
def tearDown(self):
super(DocTestCase, self).tearDown()
if self._result_var is not None:
sys.displayhook = self._old_displayhook
delattr(builtin_mod, self._result_var)
class DocFileCase(doctest.DocFileCase):
"""Overrides to provide address() method that returns the correct
address for the doc file case.
"""
def __init__(self, test, optionflags=0, setUp=None, tearDown=None,
checker=None, result_var='_'):
self._result_var = result_var
super(DocFileCase, self).__init__(
test, optionflags=optionflags, setUp=setUp, tearDown=tearDown,
checker=None)
def address(self):
return (self._dt_test.filename, None, None)
def setUp(self):
if self._result_var is not None:
self._old_displayhook = sys.displayhook
sys.displayhook = self._displayhook
super(DocFileCase, self).setUp()
def _displayhook(self, value):
if value is None:
return
setattr(builtin_mod, self._result_var, value)
print repr(value)
def tearDown(self):
super(DocFileCase, self).tearDown()
if self._result_var is not None:
sys.displayhook = self._old_displayhook
delattr(builtin_mod, self._result_var)

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"""
ErrorClass Plugins
------------------
ErrorClass plugins provide an easy way to add support for custom
handling of particular classes of exceptions.
An ErrorClass plugin defines one or more ErrorClasses and how each is
handled and reported on. Each error class is stored in a different
attribute on the result, and reported separately. Each error class must
indicate the exceptions that fall under that class, the label to use
for reporting, and whether exceptions of the class should be
considered as failures for the whole test run.
ErrorClasses use a declarative syntax. Assign an ErrorClass to the
attribute you wish to add to the result object, defining the
exceptions, label and isfailure attributes. For example, to declare an
ErrorClassPlugin that defines TodoErrors (and subclasses of TodoError)
as an error class with the label 'TODO' that is considered a failure,
do this:
>>> class Todo(Exception):
... pass
>>> class TodoError(ErrorClassPlugin):
... todo = ErrorClass(Todo, label='TODO', isfailure=True)
The MetaErrorClass metaclass translates the ErrorClass declarations
into the tuples used by the error handling and reporting functions in
the result. This is an internal format and subject to change; you
should always use the declarative syntax for attaching ErrorClasses to
an ErrorClass plugin.
>>> TodoError.errorClasses # doctest: +ELLIPSIS
((<class ...Todo...>, ('todo', 'TODO', True)),)
Let's see the plugin in action. First some boilerplate.
>>> import sys
>>> import unittest
>>> try:
... # 2.7+
... from unittest.runner import _WritelnDecorator
... except ImportError:
... from unittest import _WritelnDecorator
...
>>> buf = _WritelnDecorator(sys.stdout)
Now define a test case that raises a Todo.
>>> class TestTodo(unittest.TestCase):
... def runTest(self):
... raise Todo("I need to test something")
>>> case = TestTodo()
Prepare the result using our plugin. Normally this happens during the
course of test execution within nose -- you won't be doing this
yourself. For the purposes of this testing document, I'm stepping
through the internal process of nose so you can see what happens at
each step.
>>> plugin = TodoError()
>>> from nose.result import _TextTestResult
>>> result = _TextTestResult(stream=buf, descriptions=0, verbosity=2)
>>> plugin.prepareTestResult(result)
Now run the test. TODO is printed.
>>> _ = case(result) # doctest: +ELLIPSIS
runTest (....TestTodo) ... TODO: I need to test something
Errors and failures are empty, but todo has our test:
>>> result.errors
[]
>>> result.failures
[]
>>> result.todo # doctest: +ELLIPSIS
[(<....TestTodo testMethod=runTest>, '...Todo: I need to test something\\n')]
>>> result.printErrors() # doctest: +ELLIPSIS
<BLANKLINE>
======================================================================
TODO: runTest (....TestTodo)
----------------------------------------------------------------------
Traceback (most recent call last):
...
...Todo: I need to test something
<BLANKLINE>
Since we defined a Todo as a failure, the run was not successful.
>>> result.wasSuccessful()
False
"""
from nose.pyversion import make_instancemethod
from nose.plugins.base import Plugin
from nose.result import TextTestResult
from nose.util import isclass
class MetaErrorClass(type):
"""Metaclass for ErrorClassPlugins that allows error classes to be
set up in a declarative manner.
"""
def __init__(self, name, bases, attr):
errorClasses = []
for name, detail in attr.items():
if isinstance(detail, ErrorClass):
attr.pop(name)
for cls in detail:
errorClasses.append(
(cls, (name, detail.label, detail.isfailure)))
super(MetaErrorClass, self).__init__(name, bases, attr)
self.errorClasses = tuple(errorClasses)
class ErrorClass(object):
def __init__(self, *errorClasses, **kw):
self.errorClasses = errorClasses
try:
for key in ('label', 'isfailure'):
setattr(self, key, kw.pop(key))
except KeyError:
raise TypeError("%r is a required named argument for ErrorClass"
% key)
def __iter__(self):
return iter(self.errorClasses)
class ErrorClassPlugin(Plugin):
"""
Base class for ErrorClass plugins. Subclass this class and declare the
exceptions that you wish to handle as attributes of the subclass.
"""
__metaclass__ = MetaErrorClass
score = 1000
errorClasses = ()
def addError(self, test, err):
err_cls, a, b = err
if not isclass(err_cls):
return
classes = [e[0] for e in self.errorClasses]
if filter(lambda c: issubclass(err_cls, c), classes):
return True
def prepareTestResult(self, result):
if not hasattr(result, 'errorClasses'):
self.patchResult(result)
for cls, (storage_attr, label, isfail) in self.errorClasses:
if cls not in result.errorClasses:
storage = getattr(result, storage_attr, [])
setattr(result, storage_attr, storage)
result.errorClasses[cls] = (storage, label, isfail)
def patchResult(self, result):
result.printLabel = print_label_patch(result)
result._orig_addError, result.addError = \
result.addError, add_error_patch(result)
result._orig_wasSuccessful, result.wasSuccessful = \
result.wasSuccessful, wassuccessful_patch(result)
if hasattr(result, 'printErrors'):
result._orig_printErrors, result.printErrors = \
result.printErrors, print_errors_patch(result)
if hasattr(result, 'addSkip'):
result._orig_addSkip, result.addSkip = \
result.addSkip, add_skip_patch(result)
result.errorClasses = {}
def add_error_patch(result):
"""Create a new addError method to patch into a result instance
that recognizes the errorClasses attribute and deals with
errorclasses correctly.
"""
return make_instancemethod(TextTestResult.addError, result)
def print_errors_patch(result):
"""Create a new printErrors method that prints errorClasses items
as well.
"""
return make_instancemethod(TextTestResult.printErrors, result)
def print_label_patch(result):
"""Create a new printLabel method that prints errorClasses items
as well.
"""
return make_instancemethod(TextTestResult.printLabel, result)
def wassuccessful_patch(result):
"""Create a new wasSuccessful method that checks errorClasses for
exceptions that were put into other slots than error or failure
but that still count as not success.
"""
return make_instancemethod(TextTestResult.wasSuccessful, result)
def add_skip_patch(result):
"""Create a new addSkip method to patch into a result instance
that delegates to addError.
"""
return make_instancemethod(TextTestResult.addSkip, result)
if __name__ == '__main__':
import doctest
doctest.testmod()

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"""
This plugin provides assert introspection. When the plugin is enabled
and a test failure occurs, the traceback is displayed with extra context
around the line in which the exception was raised. Simple variable
substitution is also performed in the context output to provide more
debugging information.
"""
from nose.plugins import Plugin
from nose.pyversion import exc_to_unicode, force_unicode
from nose.inspector import inspect_traceback
class FailureDetail(Plugin):
"""
Plugin that provides extra information in tracebacks of test failures.
"""
score = 1600 # before capture
def options(self, parser, env):
"""Register commmandline options.
"""
parser.add_option(
"-d", "--detailed-errors", "--failure-detail",
action="store_true",
default=env.get('NOSE_DETAILED_ERRORS'),
dest="detailedErrors", help="Add detail to error"
" output by attempting to evaluate failed"
" asserts [NOSE_DETAILED_ERRORS]")
def configure(self, options, conf):
"""Configure plugin.
"""
if not self.can_configure:
return
self.enabled = options.detailedErrors
self.conf = conf
def formatFailure(self, test, err):
"""Add detail from traceback inspection to error message of a failure.
"""
ec, ev, tb = err
tbinfo, str_ev = None, exc_to_unicode(ev)
if tb:
tbinfo = force_unicode(inspect_traceback(tb))
str_ev = '\n'.join([str_ev, tbinfo])
test.tbinfo = tbinfo
return (ec, str_ev, tb)

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"""The isolation plugin resets the contents of sys.modules after running
each test module or package. Use it by setting ``--with-isolation`` or the
NOSE_WITH_ISOLATION environment variable.
The effects are similar to wrapping the following functions around the
import and execution of each test module::
def setup(module):
module._mods = sys.modules.copy()
def teardown(module):
to_del = [ m for m in sys.modules.keys() if m not in
module._mods ]
for mod in to_del:
del sys.modules[mod]
sys.modules.update(module._mods)
Isolation works only during lazy loading. In normal use, this is only
during discovery of modules within a directory, where the process of
importing, loading tests and running tests from each module is
encapsulated in a single loadTestsFromName call. This plugin
implements loadTestsFromNames to force the same lazy-loading there,
which allows isolation to work in directed mode as well as discovery,
at the cost of some efficiency: lazy-loading names forces full context
setup and teardown to run for each name, defeating the grouping that
is normally used to ensure that context setup and teardown are run the
fewest possible times for a given set of names.
.. warning ::
This plugin should not be used in conjunction with other plugins
that assume that modules, once imported, will stay imported; for
instance, it may cause very odd results when used with the coverage
plugin.
"""
import logging
import sys
from nose.plugins import Plugin
log = logging.getLogger('nose.plugins.isolation')
class IsolationPlugin(Plugin):
"""
Activate the isolation plugin to isolate changes to external
modules to a single test module or package. The isolation plugin
resets the contents of sys.modules after each test module or
package runs to its state before the test. PLEASE NOTE that this
plugin should not be used with the coverage plugin, or in any other case
where module reloading may produce undesirable side-effects.
"""
score = 10 # I want to be last
name = 'isolation'
def configure(self, options, conf):
"""Configure plugin.
"""
Plugin.configure(self, options, conf)
self._mod_stack = []
def beforeContext(self):
"""Copy sys.modules onto my mod stack
"""
mods = sys.modules.copy()
self._mod_stack.append(mods)
def afterContext(self):
"""Pop my mod stack and restore sys.modules to the state
it was in when mod stack was pushed.
"""
mods = self._mod_stack.pop()
to_del = [ m for m in sys.modules.keys() if m not in mods ]
if to_del:
log.debug('removing sys modules entries: %s', to_del)
for mod in to_del:
del sys.modules[mod]
sys.modules.update(mods)
def loadTestsFromNames(self, names, module=None):
"""Create a lazy suite that calls beforeContext and afterContext
around each name. The side-effect of this is that full context
fixtures will be set up and torn down around each test named.
"""
# Fast path for when we don't care
if not names or len(names) == 1:
return
loader = self.loader
plugins = self.conf.plugins
def lazy():
for name in names:
plugins.beforeContext()
yield loader.loadTestsFromName(name, module=module)
plugins.afterContext()
return (loader.suiteClass(lazy), [])
def prepareTestLoader(self, loader):
"""Get handle on test loader so we can use it in loadTestsFromNames.
"""
self.loader = loader

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"""
This plugin captures logging statements issued during test execution. When an
error or failure occurs, the captured log messages are attached to the running
test in the test.capturedLogging attribute, and displayed with the error failure
output. It is enabled by default but can be turned off with the option
``--nologcapture``.
You can filter captured logging statements with the ``--logging-filter`` option.
If set, it specifies which logger(s) will be captured; loggers that do not match
will be passed. Example: specifying ``--logging-filter=sqlalchemy,myapp``
will ensure that only statements logged via sqlalchemy.engine, myapp
or myapp.foo.bar logger will be logged.
You can remove other installed logging handlers with the
``--logging-clear-handlers`` option.
"""
import logging
from logging import Handler
import threading
from nose.plugins.base import Plugin
from nose.util import anyp, ln, safe_str
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
log = logging.getLogger(__name__)
class FilterSet(object):
def __init__(self, filter_components):
self.inclusive, self.exclusive = self._partition(filter_components)
# @staticmethod
def _partition(components):
inclusive, exclusive = [], []
for component in components:
if component.startswith('-'):
exclusive.append(component[1:])
else:
inclusive.append(component)
return inclusive, exclusive
_partition = staticmethod(_partition)
def allow(self, record):
"""returns whether this record should be printed"""
if not self:
# nothing to filter
return True
return self._allow(record) and not self._deny(record)
# @staticmethod
def _any_match(matchers, record):
"""return the bool of whether `record` starts with
any item in `matchers`"""
def record_matches_key(key):
return record == key or record.startswith(key + '.')
return anyp(bool, map(record_matches_key, matchers))
_any_match = staticmethod(_any_match)
def _allow(self, record):
if not self.inclusive:
return True
return self._any_match(self.inclusive, record)
def _deny(self, record):
if not self.exclusive:
return False
return self._any_match(self.exclusive, record)
class MyMemoryHandler(Handler):
def __init__(self, logformat, logdatefmt, filters):
Handler.__init__(self)
fmt = logging.Formatter(logformat, logdatefmt)
self.setFormatter(fmt)
self.filterset = FilterSet(filters)
self.buffer = []
def emit(self, record):
self.buffer.append(self.format(record))
def flush(self):
pass # do nothing
def truncate(self):
self.buffer = []
def filter(self, record):
if self.filterset.allow(record.name):
return Handler.filter(self, record)
def __getstate__(self):
state = self.__dict__.copy()
del state['lock']
return state
def __setstate__(self, state):
self.__dict__.update(state)
self.lock = threading.RLock()
class LogCapture(Plugin):
"""
Log capture plugin. Enabled by default. Disable with --nologcapture.
This plugin captures logging statements issued during test execution,
appending any output captured to the error or failure output,
should the test fail or raise an error.
"""
enabled = True
env_opt = 'NOSE_NOLOGCAPTURE'
name = 'logcapture'
score = 500
logformat = '%(name)s: %(levelname)s: %(message)s'
logdatefmt = None
clear = False
filters = ['-nose']
def options(self, parser, env):
"""Register commandline options.
"""
parser.add_option(
"--nologcapture", action="store_false",
default=not env.get(self.env_opt), dest="logcapture",
help="Disable logging capture plugin. "
"Logging configuration will be left intact."
" [NOSE_NOLOGCAPTURE]")
parser.add_option(
"--logging-format", action="store", dest="logcapture_format",
default=env.get('NOSE_LOGFORMAT') or self.logformat,
metavar="FORMAT",
help="Specify custom format to print statements. "
"Uses the same format as used by standard logging handlers."
" [NOSE_LOGFORMAT]")
parser.add_option(
"--logging-datefmt", action="store", dest="logcapture_datefmt",
default=env.get('NOSE_LOGDATEFMT') or self.logdatefmt,
metavar="FORMAT",
help="Specify custom date/time format to print statements. "
"Uses the same format as used by standard logging handlers."
" [NOSE_LOGDATEFMT]")
parser.add_option(
"--logging-filter", action="store", dest="logcapture_filters",
default=env.get('NOSE_LOGFILTER'),
metavar="FILTER",
help="Specify which statements to filter in/out. "
"By default, everything is captured. If the output is too"
" verbose,\nuse this option to filter out needless output.\n"
"Example: filter=foo will capture statements issued ONLY to\n"
" foo or foo.what.ever.sub but not foobar or other logger.\n"
"Specify multiple loggers with comma: filter=foo,bar,baz.\n"
"If any logger name is prefixed with a minus, eg filter=-foo,\n"
"it will be excluded rather than included. Default: "
"exclude logging messages from nose itself (-nose)."
" [NOSE_LOGFILTER]\n")
parser.add_option(
"--logging-clear-handlers", action="store_true",
default=False, dest="logcapture_clear",
help="Clear all other logging handlers")
parser.add_option(
"--logging-level", action="store",
default='NOTSET', dest="logcapture_level",
help="Set the log level to capture")
def configure(self, options, conf):
"""Configure plugin.
"""
self.conf = conf
# Disable if explicitly disabled, or if logging is
# configured via logging config file
if not options.logcapture or conf.loggingConfig:
self.enabled = False
self.logformat = options.logcapture_format
self.logdatefmt = options.logcapture_datefmt
self.clear = options.logcapture_clear
self.loglevel = options.logcapture_level
if options.logcapture_filters:
self.filters = options.logcapture_filters.split(',')
def setupLoghandler(self):
# setup our handler with root logger
root_logger = logging.getLogger()
if self.clear:
if hasattr(root_logger, "handlers"):
for handler in root_logger.handlers:
root_logger.removeHandler(handler)
for logger in logging.Logger.manager.loggerDict.values():
if hasattr(logger, "handlers"):
for handler in logger.handlers:
logger.removeHandler(handler)
# make sure there isn't one already
# you can't simply use "if self.handler not in root_logger.handlers"
# since at least in unit tests this doesn't work --
# LogCapture() is instantiated for each test case while root_logger
# is module global
# so we always add new MyMemoryHandler instance
for handler in root_logger.handlers[:]:
if isinstance(handler, MyMemoryHandler):
root_logger.handlers.remove(handler)
root_logger.addHandler(self.handler)
# to make sure everything gets captured
loglevel = getattr(self, "loglevel", "NOTSET")
root_logger.setLevel(getattr(logging, loglevel))
def begin(self):
"""Set up logging handler before test run begins.
"""
self.start()
def start(self):
self.handler = MyMemoryHandler(self.logformat, self.logdatefmt,
self.filters)
self.setupLoghandler()
def end(self):
pass
def beforeTest(self, test):
"""Clear buffers and handlers before test.
"""
self.setupLoghandler()
def afterTest(self, test):
"""Clear buffers after test.
"""
self.handler.truncate()
def formatFailure(self, test, err):
"""Add captured log messages to failure output.
"""
return self.formatError(test, err)
def formatError(self, test, err):
"""Add captured log messages to error output.
"""
# logic flow copied from Capture.formatError
test.capturedLogging = records = self.formatLogRecords()
if not records:
return err
ec, ev, tb = err
return (ec, self.addCaptureToErr(ev, records), tb)
def formatLogRecords(self):
return map(safe_str, self.handler.buffer)
def addCaptureToErr(self, ev, records):
return '\n'.join([safe_str(ev), ln('>> begin captured logging <<')] + \
records + \
[ln('>> end captured logging <<')])

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"""
Plugin Manager
--------------
A plugin manager class is used to load plugins, manage the list of
loaded plugins, and proxy calls to those plugins.
The plugin managers provided with nose are:
:class:`PluginManager`
This manager doesn't implement loadPlugins, so it can only work
with a static list of plugins.
:class:`BuiltinPluginManager`
This manager loads plugins referenced in ``nose.plugins.builtin``.
:class:`EntryPointPluginManager`
This manager uses setuptools entrypoints to load plugins.
:class:`ExtraPluginsPluginManager`
This manager loads extra plugins specified with the keyword
`addplugins`.
:class:`DefaultPluginMananger`
This is the manager class that will be used by default. If
setuptools is installed, it is a subclass of
:class:`EntryPointPluginManager` and :class:`BuiltinPluginManager`;
otherwise, an alias to :class:`BuiltinPluginManager`.
:class:`RestrictedPluginManager`
This manager is for use in test runs where some plugin calls are
not available, such as runs started with ``python setup.py test``,
where the test runner is the default unittest :class:`TextTestRunner`. It
is a subclass of :class:`DefaultPluginManager`.
Writing a plugin manager
========================
If you want to load plugins via some other means, you can write a
plugin manager and pass an instance of your plugin manager class when
instantiating the :class:`nose.config.Config` instance that you pass to
:class:`TestProgram` (or :func:`main` or :func:`run`).
To implement your plugin loading scheme, implement ``loadPlugins()``,
and in that method, call ``addPlugin()`` with an instance of each plugin
you wish to make available. Make sure to call
``super(self).loadPlugins()`` as well if have subclassed a manager
other than ``PluginManager``.
"""
import inspect
import logging
import os
import sys
from itertools import chain as iterchain
from warnings import warn
import nose.config
from nose.failure import Failure
from nose.plugins.base import IPluginInterface
from nose.pyversion import sort_list
try:
import cPickle as pickle
except:
import pickle
try:
from cStringIO import StringIO
except:
from StringIO import StringIO
__all__ = ['DefaultPluginManager', 'PluginManager', 'EntryPointPluginManager',
'BuiltinPluginManager', 'RestrictedPluginManager']
log = logging.getLogger(__name__)
class PluginProxy(object):
"""Proxy for plugin calls. Essentially a closure bound to the
given call and plugin list.
The plugin proxy also must be bound to a particular plugin
interface specification, so that it knows what calls are available
and any special handling that is required for each call.
"""
interface = IPluginInterface
def __init__(self, call, plugins):
try:
self.method = getattr(self.interface, call)
except AttributeError:
raise AttributeError("%s is not a valid %s method"
% (call, self.interface.__name__))
self.call = self.makeCall(call)
self.plugins = []
for p in plugins:
self.addPlugin(p, call)
def __call__(self, *arg, **kw):
return self.call(*arg, **kw)
def addPlugin(self, plugin, call):
"""Add plugin to my list of plugins to call, if it has the attribute
I'm bound to.
"""
meth = getattr(plugin, call, None)
if meth is not None:
if call == 'loadTestsFromModule' and \
len(inspect.getargspec(meth)[0]) == 2:
orig_meth = meth
meth = lambda module, path, **kwargs: orig_meth(module)
self.plugins.append((plugin, meth))
def makeCall(self, call):
if call == 'loadTestsFromNames':
# special case -- load tests from names behaves somewhat differently
# from other chainable calls, because plugins return a tuple, only
# part of which can be chained to the next plugin.
return self._loadTestsFromNames
meth = self.method
if getattr(meth, 'generative', False):
# call all plugins and yield a flattened iterator of their results
return lambda *arg, **kw: list(self.generate(*arg, **kw))
elif getattr(meth, 'chainable', False):
return self.chain
else:
# return a value from the first plugin that returns non-None
return self.simple
def chain(self, *arg, **kw):
"""Call plugins in a chain, where the result of each plugin call is
sent to the next plugin as input. The final output result is returned.
"""
result = None
# extract the static arguments (if any) from arg so they can
# be passed to each plugin call in the chain
static = [a for (static, a)
in zip(getattr(self.method, 'static_args', []), arg)
if static]
for p, meth in self.plugins:
result = meth(*arg, **kw)
arg = static[:]
arg.append(result)
return result
def generate(self, *arg, **kw):
"""Call all plugins, yielding each item in each non-None result.
"""
for p, meth in self.plugins:
result = None
try:
result = meth(*arg, **kw)
if result is not None:
for r in result:
yield r
except (KeyboardInterrupt, SystemExit):
raise
except:
exc = sys.exc_info()
yield Failure(*exc)
continue
def simple(self, *arg, **kw):
"""Call all plugins, returning the first non-None result.
"""
for p, meth in self.plugins:
result = meth(*arg, **kw)
if result is not None:
return result
def _loadTestsFromNames(self, names, module=None):
"""Chainable but not quite normal. Plugins return a tuple of
(tests, names) after processing the names. The tests are added
to a suite that is accumulated throughout the full call, while
names are input for the next plugin in the chain.
"""
suite = []
for p, meth in self.plugins:
result = meth(names, module=module)
if result is not None:
suite_part, names = result
if suite_part:
suite.extend(suite_part)
return suite, names
class NoPlugins(object):
"""Null Plugin manager that has no plugins."""
interface = IPluginInterface
def __init__(self):
self._plugins = self.plugins = ()
def __iter__(self):
return ()
def _doNothing(self, *args, **kwds):
pass
def _emptyIterator(self, *args, **kwds):
return ()
def __getattr__(self, call):
method = getattr(self.interface, call)
if getattr(method, "generative", False):
return self._emptyIterator
else:
return self._doNothing
def addPlugin(self, plug):
raise NotImplementedError()
def addPlugins(self, plugins):
raise NotImplementedError()
def configure(self, options, config):
pass
def loadPlugins(self):
pass
def sort(self):
pass
class PluginManager(object):
"""Base class for plugin managers. PluginManager is intended to be
used only with a static list of plugins. The loadPlugins() implementation
only reloads plugins from _extraplugins to prevent those from being
overridden by a subclass.
The basic functionality of a plugin manager is to proxy all unknown
attributes through a ``PluginProxy`` to a list of plugins.
Note that the list of plugins *may not* be changed after the first plugin
call.
"""
proxyClass = PluginProxy
def __init__(self, plugins=(), proxyClass=None):
self._plugins = []
self._extraplugins = ()
self._proxies = {}
if plugins:
self.addPlugins(plugins)
if proxyClass is not None:
self.proxyClass = proxyClass
def __getattr__(self, call):
try:
return self._proxies[call]
except KeyError:
proxy = self.proxyClass(call, self._plugins)
self._proxies[call] = proxy
return proxy
def __iter__(self):
return iter(self.plugins)
def addPlugin(self, plug):
# allow, for instance, plugins loaded via entry points to
# supplant builtin plugins.
new_name = getattr(plug, 'name', object())
self._plugins[:] = [p for p in self._plugins
if getattr(p, 'name', None) != new_name]
self._plugins.append(plug)
def addPlugins(self, plugins=(), extraplugins=()):
"""extraplugins are maintained in a separate list and
re-added by loadPlugins() to prevent their being overwritten
by plugins added by a subclass of PluginManager
"""
self._extraplugins = extraplugins
for plug in iterchain(plugins, extraplugins):
self.addPlugin(plug)
def configure(self, options, config):
"""Configure the set of plugins with the given options
and config instance. After configuration, disabled plugins
are removed from the plugins list.
"""
log.debug("Configuring plugins")
self.config = config
cfg = PluginProxy('configure', self._plugins)
cfg(options, config)
enabled = [plug for plug in self._plugins if plug.enabled]
self.plugins = enabled
self.sort()
log.debug("Plugins enabled: %s", enabled)
def loadPlugins(self):
for plug in self._extraplugins:
self.addPlugin(plug)
def sort(self):
return sort_list(self._plugins, lambda x: getattr(x, 'score', 1), reverse=True)
def _get_plugins(self):
return self._plugins
def _set_plugins(self, plugins):
self._plugins = []
self.addPlugins(plugins)
plugins = property(_get_plugins, _set_plugins, None,
"""Access the list of plugins managed by
this plugin manager""")
class ZeroNinePlugin:
"""Proxy for 0.9 plugins, adapts 0.10 calls to 0.9 standard.
"""
def __init__(self, plugin):
self.plugin = plugin
def options(self, parser, env=os.environ):
self.plugin.add_options(parser, env)
def addError(self, test, err):
if not hasattr(self.plugin, 'addError'):
return
# switch off to addSkip, addDeprecated if those types
from nose.exc import SkipTest, DeprecatedTest
ec, ev, tb = err
if issubclass(ec, SkipTest):
if not hasattr(self.plugin, 'addSkip'):
return
return self.plugin.addSkip(test.test)
elif issubclass(ec, DeprecatedTest):
if not hasattr(self.plugin, 'addDeprecated'):
return
return self.plugin.addDeprecated(test.test)
# add capt
capt = test.capturedOutput
return self.plugin.addError(test.test, err, capt)
def loadTestsFromFile(self, filename):
if hasattr(self.plugin, 'loadTestsFromPath'):
return self.plugin.loadTestsFromPath(filename)
def addFailure(self, test, err):
if not hasattr(self.plugin, 'addFailure'):
return
# add capt and tbinfo
capt = test.capturedOutput
tbinfo = test.tbinfo
return self.plugin.addFailure(test.test, err, capt, tbinfo)
def addSuccess(self, test):
if not hasattr(self.plugin, 'addSuccess'):
return
capt = test.capturedOutput
self.plugin.addSuccess(test.test, capt)
def startTest(self, test):
if not hasattr(self.plugin, 'startTest'):
return
return self.plugin.startTest(test.test)
def stopTest(self, test):
if not hasattr(self.plugin, 'stopTest'):
return
return self.plugin.stopTest(test.test)
def __getattr__(self, val):
return getattr(self.plugin, val)
class EntryPointPluginManager(PluginManager):
"""Plugin manager that loads plugins from the `nose.plugins` and
`nose.plugins.0.10` entry points.
"""
entry_points = (('nose.plugins.0.10', None),
('nose.plugins', ZeroNinePlugin))
def loadPlugins(self):
"""Load plugins by iterating the `nose.plugins` entry point.
"""
from pkg_resources import iter_entry_points
loaded = {}
for entry_point, adapt in self.entry_points:
for ep in iter_entry_points(entry_point):
if ep.name in loaded:
continue
loaded[ep.name] = True
log.debug('%s load plugin %s', self.__class__.__name__, ep)
try:
plugcls = ep.load()
except KeyboardInterrupt:
raise
except Exception, e:
# never want a plugin load to kill the test run
# but we can't log here because the logger is not yet
# configured
warn("Unable to load plugin %s: %s" % (ep, e),
RuntimeWarning)
continue
if adapt:
plug = adapt(plugcls())
else:
plug = plugcls()
self.addPlugin(plug)
super(EntryPointPluginManager, self).loadPlugins()
class BuiltinPluginManager(PluginManager):
"""Plugin manager that loads plugins from the list in
`nose.plugins.builtin`.
"""
def loadPlugins(self):
"""Load plugins in nose.plugins.builtin
"""
from nose.plugins import builtin
for plug in builtin.plugins:
self.addPlugin(plug())
super(BuiltinPluginManager, self).loadPlugins()
try:
import pkg_resources
class DefaultPluginManager(EntryPointPluginManager, BuiltinPluginManager):
pass
except ImportError:
class DefaultPluginManager(BuiltinPluginManager):
pass
class RestrictedPluginManager(DefaultPluginManager):
"""Plugin manager that restricts the plugin list to those not
excluded by a list of exclude methods. Any plugin that implements
an excluded method will be removed from the manager's plugin list
after plugins are loaded.
"""
def __init__(self, plugins=(), exclude=(), load=True):
DefaultPluginManager.__init__(self, plugins)
self.load = load
self.exclude = exclude
self.excluded = []
self._excludedOpts = None
def excludedOption(self, name):
if self._excludedOpts is None:
from optparse import OptionParser
self._excludedOpts = OptionParser(add_help_option=False)
for plugin in self.excluded:
plugin.options(self._excludedOpts, env={})
return self._excludedOpts.get_option('--' + name)
def loadPlugins(self):
if self.load:
DefaultPluginManager.loadPlugins(self)
allow = []
for plugin in self.plugins:
ok = True
for method in self.exclude:
if hasattr(plugin, method):
ok = False
self.excluded.append(plugin)
break
if ok:
allow.append(plugin)
self.plugins = allow

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"""
Overview
========
The multiprocess plugin enables you to distribute your test run among a set of
worker processes that run tests in parallel. This can speed up CPU-bound test
runs (as long as the number of work processeses is around the number of
processors or cores available), but is mainly useful for IO-bound tests that
spend most of their time waiting for data to arrive from someplace else.
.. note ::
See :doc:`../doc_tests/test_multiprocess/multiprocess` for
additional documentation and examples. Use of this plugin on python
2.5 or earlier requires the multiprocessing_ module, also available
from PyPI.
.. _multiprocessing : http://code.google.com/p/python-multiprocessing/
How tests are distributed
=========================
The ideal case would be to dispatch each test to a worker process
separately. This ideal is not attainable in all cases, however, because many
test suites depend on context (class, module or package) fixtures.
The plugin can't know (unless you tell it -- see below!) if a context fixture
can be called many times concurrently (is re-entrant), or if it can be shared
among tests running in different processes. Therefore, if a context has
fixtures, the default behavior is to dispatch the entire suite to a worker as
a unit.
Controlling distribution
^^^^^^^^^^^^^^^^^^^^^^^^
There are two context-level variables that you can use to control this default
behavior.
If a context's fixtures are re-entrant, set ``_multiprocess_can_split_ = True``
in the context, and the plugin will dispatch tests in suites bound to that
context as if the context had no fixtures. This means that the fixtures will
execute concurrently and multiple times, typically once per test.
If a context's fixtures can be shared by tests running in different processes
-- such as a package-level fixture that starts an external http server or
initializes a shared database -- then set ``_multiprocess_shared_ = True`` in
the context. These fixtures will then execute in the primary nose process, and
tests in those contexts will be individually dispatched to run in parallel.
How results are collected and reported
======================================
As each test or suite executes in a worker process, results (failures, errors,
and specially handled exceptions like SkipTest) are collected in that
process. When the worker process finishes, it returns results to the main
nose process. There, any progress output is printed (dots!), and the
results from the test run are combined into a consolidated result
set. When results have been received for all dispatched tests, or all
workers have died, the result summary is output as normal.
Beware!
=======
Not all test suites will benefit from, or even operate correctly using, this
plugin. For example, CPU-bound tests will run more slowly if you don't have
multiple processors. There are also some differences in plugin
interactions and behaviors due to the way in which tests are dispatched and
loaded. In general, test loading under this plugin operates as if it were
always in directed mode instead of discovered mode. For instance, doctests
in test modules will always be found when using this plugin with the doctest
plugin.
But the biggest issue you will face is probably concurrency. Unless you
have kept your tests as religiously pure unit tests, with no side-effects, no
ordering issues, and no external dependencies, chances are you will experience
odd, intermittent and unexplainable failures and errors when using this
plugin. This doesn't necessarily mean the plugin is broken; it may mean that
your test suite is not safe for concurrency.
New Features in 1.1.0
=====================
* functions generated by test generators are now added to the worker queue
making them multi-threaded.
* fixed timeout functionality, now functions will be terminated with a
TimedOutException exception when they exceed their execution time. The
worker processes are not terminated.
* added ``--process-restartworker`` option to restart workers once they are
done, this helps control memory usage. Sometimes memory leaks can accumulate
making long runs very difficult.
* added global _instantiate_plugins to configure which plugins are started
on the worker processes.
"""
import logging
import os
import sys
import time
import traceback
import unittest
import pickle
import signal
import nose.case
from nose.core import TextTestRunner
from nose import failure
from nose import loader
from nose.plugins.base import Plugin
from nose.pyversion import bytes_
from nose.result import TextTestResult
from nose.suite import ContextSuite
from nose.util import test_address
try:
# 2.7+
from unittest.runner import _WritelnDecorator
except ImportError:
from unittest import _WritelnDecorator
from Queue import Empty
from warnings import warn
try:
from cStringIO import StringIO
except ImportError:
import StringIO
# this is a list of plugin classes that will be checked for and created inside
# each worker process
_instantiate_plugins = None
log = logging.getLogger(__name__)
Process = Queue = Pool = Event = Value = Array = None
# have to inherit KeyboardInterrupt to it will interrupt process properly
class TimedOutException(KeyboardInterrupt):
def __init__(self, value = "Timed Out"):
self.value = value
def __str__(self):
return repr(self.value)
def _import_mp():
global Process, Queue, Pool, Event, Value, Array
try:
from multiprocessing import Manager, Process
#prevent the server process created in the manager which holds Python
#objects and allows other processes to manipulate them using proxies
#to interrupt on SIGINT (keyboardinterrupt) so that the communication
#channel between subprocesses and main process is still usable after
#ctrl+C is received in the main process.
old=signal.signal(signal.SIGINT, signal.SIG_IGN)
m = Manager()
#reset it back so main process will receive a KeyboardInterrupt
#exception on ctrl+c
signal.signal(signal.SIGINT, old)
Queue, Pool, Event, Value, Array = (
m.Queue, m.Pool, m.Event, m.Value, m.Array
)
except ImportError:
warn("multiprocessing module is not available, multiprocess plugin "
"cannot be used", RuntimeWarning)
class TestLet:
def __init__(self, case):
try:
self._id = case.id()
except AttributeError:
pass
self._short_description = case.shortDescription()
self._str = str(case)
def id(self):
return self._id
def shortDescription(self):
return self._short_description
def __str__(self):
return self._str
class MultiProcess(Plugin):
"""
Run tests in multiple processes. Requires processing module.
"""
score = 1000
status = {}
def options(self, parser, env):
"""
Register command-line options.
"""
parser.add_option("--processes", action="store",
default=env.get('NOSE_PROCESSES', 0),
dest="multiprocess_workers",
metavar="NUM",
help="Spread test run among this many processes. "
"Set a number equal to the number of processors "
"or cores in your machine for best results. "
"Pass a negative number to have the number of "
"processes automatically set to the number of "
"cores. Passing 0 means to disable parallel "
"testing. Default is 0 unless NOSE_PROCESSES is "
"set. "
"[NOSE_PROCESSES]")
parser.add_option("--process-timeout", action="store",
default=env.get('NOSE_PROCESS_TIMEOUT', 10),
dest="multiprocess_timeout",
metavar="SECONDS",
help="Set timeout for return of results from each "
"test runner process. Default is 10. "
"[NOSE_PROCESS_TIMEOUT]")
parser.add_option("--process-restartworker", action="store_true",
default=env.get('NOSE_PROCESS_RESTARTWORKER', False),
dest="multiprocess_restartworker",
help="If set, will restart each worker process once"
" their tests are done, this helps control memory "
"leaks from killing the system. "
"[NOSE_PROCESS_RESTARTWORKER]")
def configure(self, options, config):
"""
Configure plugin.
"""
try:
self.status.pop('active')
except KeyError:
pass
if not hasattr(options, 'multiprocess_workers'):
self.enabled = False
return
# don't start inside of a worker process
if config.worker:
return
self.config = config
try:
workers = int(options.multiprocess_workers)
except (TypeError, ValueError):
workers = 0
if workers:
_import_mp()
if Process is None:
self.enabled = False
return
# Negative number of workers will cause multiprocessing to hang.
# Set the number of workers to the CPU count to avoid this.
if workers < 0:
try:
import multiprocessing
workers = multiprocessing.cpu_count()
except NotImplementedError:
self.enabled = False
return
self.enabled = True
self.config.multiprocess_workers = workers
t = float(options.multiprocess_timeout)
self.config.multiprocess_timeout = t
r = int(options.multiprocess_restartworker)
self.config.multiprocess_restartworker = r
self.status['active'] = True
def prepareTestLoader(self, loader):
"""Remember loader class so MultiProcessTestRunner can instantiate
the right loader.
"""
self.loaderClass = loader.__class__
def prepareTestRunner(self, runner):
"""Replace test runner with MultiProcessTestRunner.
"""
# replace with our runner class
return MultiProcessTestRunner(stream=runner.stream,
verbosity=self.config.verbosity,
config=self.config,
loaderClass=self.loaderClass)
def signalhandler(sig, frame):
raise TimedOutException()
class MultiProcessTestRunner(TextTestRunner):
waitkilltime = 5.0 # max time to wait to terminate a process that does not
# respond to SIGILL
def __init__(self, **kw):
self.loaderClass = kw.pop('loaderClass', loader.defaultTestLoader)
super(MultiProcessTestRunner, self).__init__(**kw)
def collect(self, test, testQueue, tasks, to_teardown, result):
# dispatch and collect results
# put indexes only on queue because tests aren't picklable
for case in self.nextBatch(test):
log.debug("Next batch %s (%s)", case, type(case))
if (isinstance(case, nose.case.Test) and
isinstance(case.test, failure.Failure)):
log.debug("Case is a Failure")
case(result) # run here to capture the failure
continue
# handle shared fixtures
if isinstance(case, ContextSuite) and case.context is failure.Failure:
log.debug("Case is a Failure")
case(result) # run here to capture the failure
continue
elif isinstance(case, ContextSuite) and self.sharedFixtures(case):
log.debug("%s has shared fixtures", case)
try:
case.setUp()
except (KeyboardInterrupt, SystemExit):
raise
except:
log.debug("%s setup failed", sys.exc_info())
result.addError(case, sys.exc_info())
else:
to_teardown.append(case)
if case.factory:
ancestors=case.factory.context.get(case, [])
for an in ancestors[:2]:
#log.debug('reset ancestor %s', an)
if getattr(an, '_multiprocess_shared_', False):
an._multiprocess_can_split_=True
#an._multiprocess_shared_=False
self.collect(case, testQueue, tasks, to_teardown, result)
else:
test_addr = self.addtask(testQueue,tasks,case)
log.debug("Queued test %s (%s) to %s",
len(tasks), test_addr, testQueue)
def startProcess(self, iworker, testQueue, resultQueue, shouldStop, result):
currentaddr = Value('c',bytes_(''))
currentstart = Value('d',time.time())
keyboardCaught = Event()
p = Process(target=runner,
args=(iworker, testQueue,
resultQueue,
currentaddr,
currentstart,
keyboardCaught,
shouldStop,
self.loaderClass,
result.__class__,
pickle.dumps(self.config)))
p.currentaddr = currentaddr
p.currentstart = currentstart
p.keyboardCaught = keyboardCaught
old = signal.signal(signal.SIGILL, signalhandler)
p.start()
signal.signal(signal.SIGILL, old)
return p
def run(self, test):
"""
Execute the test (which may be a test suite). If the test is a suite,
distribute it out among as many processes as have been configured, at
as fine a level as is possible given the context fixtures defined in
the suite or any sub-suites.
"""
log.debug("%s.run(%s) (%s)", self, test, os.getpid())
wrapper = self.config.plugins.prepareTest(test)
if wrapper is not None:
test = wrapper
# plugins can decorate or capture the output stream
wrapped = self.config.plugins.setOutputStream(self.stream)
if wrapped is not None:
self.stream = wrapped
testQueue = Queue()
resultQueue = Queue()
tasks = []
completed = []
workers = []
to_teardown = []
shouldStop = Event()
result = self._makeResult()
start = time.time()
self.collect(test, testQueue, tasks, to_teardown, result)
log.debug("Starting %s workers", self.config.multiprocess_workers)
for i in range(self.config.multiprocess_workers):
p = self.startProcess(i, testQueue, resultQueue, shouldStop, result)
workers.append(p)
log.debug("Started worker process %s", i+1)
total_tasks = len(tasks)
# need to keep track of the next time to check for timeouts in case
# more than one process times out at the same time.
nexttimeout=self.config.multiprocess_timeout
thrownError = None
try:
while tasks:
log.debug("Waiting for results (%s/%s tasks), next timeout=%.3fs",
len(completed), total_tasks,nexttimeout)
try:
iworker, addr, newtask_addrs, batch_result = resultQueue.get(
timeout=nexttimeout)
log.debug('Results received for worker %d, %s, new tasks: %d',
iworker,addr,len(newtask_addrs))
try:
try:
tasks.remove(addr)
except ValueError:
log.warn('worker %s failed to remove from tasks: %s',
iworker,addr)
total_tasks += len(newtask_addrs)
tasks.extend(newtask_addrs)
except KeyError:
log.debug("Got result for unknown task? %s", addr)
log.debug("current: %s",str(list(tasks)[0]))
else:
completed.append([addr,batch_result])
self.consolidate(result, batch_result)
if (self.config.stopOnError
and not result.wasSuccessful()):
# set the stop condition
shouldStop.set()
break
if self.config.multiprocess_restartworker:
log.debug('joining worker %s',iworker)
# wait for working, but not that important if worker
# cannot be joined in fact, for workers that add to
# testQueue, they will not terminate until all their
# items are read
workers[iworker].join(timeout=1)
if not shouldStop.is_set() and not testQueue.empty():
log.debug('starting new process on worker %s',iworker)
workers[iworker] = self.startProcess(iworker, testQueue, resultQueue, shouldStop, result)
except Empty:
log.debug("Timed out with %s tasks pending "
"(empty testQueue=%r): %s",
len(tasks),testQueue.empty(),str(tasks))
any_alive = False
for iworker, w in enumerate(workers):
if w.is_alive():
worker_addr = bytes_(w.currentaddr.value,'ascii')
timeprocessing = time.time() - w.currentstart.value
if ( len(worker_addr) == 0
and timeprocessing > self.config.multiprocess_timeout-0.1):
log.debug('worker %d has finished its work item, '
'but is not exiting? do we wait for it?',
iworker)
else:
any_alive = True
if (len(worker_addr) > 0
and timeprocessing > self.config.multiprocess_timeout-0.1):
log.debug('timed out worker %s: %s',
iworker,worker_addr)
w.currentaddr.value = bytes_('')
# If the process is in C++ code, sending a SIGILL
# might not send a python KeybordInterrupt exception
# therefore, send multiple signals until an
# exception is caught. If this takes too long, then
# terminate the process
w.keyboardCaught.clear()
startkilltime = time.time()
while not w.keyboardCaught.is_set() and w.is_alive():
if time.time()-startkilltime > self.waitkilltime:
# have to terminate...
log.error("terminating worker %s",iworker)
w.terminate()
# there is a small probability that the
# terminated process might send a result,
# which has to be specially handled or
# else processes might get orphaned.
workers[iworker] = w = self.startProcess(iworker, testQueue, resultQueue, shouldStop, result)
break
os.kill(w.pid, signal.SIGILL)
time.sleep(0.1)
if not any_alive and testQueue.empty():
log.debug("All workers dead")
break
nexttimeout=self.config.multiprocess_timeout
for w in workers:
if w.is_alive() and len(w.currentaddr.value) > 0:
timeprocessing = time.time()-w.currentstart.value
if timeprocessing <= self.config.multiprocess_timeout:
nexttimeout = min(nexttimeout,
self.config.multiprocess_timeout-timeprocessing)
log.debug("Completed %s tasks (%s remain)", len(completed), len(tasks))
except (KeyboardInterrupt, SystemExit), e:
log.info('parent received ctrl-c when waiting for test results')
thrownError = e
#resultQueue.get(False)
result.addError(test, sys.exc_info())
try:
for case in to_teardown:
log.debug("Tearing down shared fixtures for %s", case)
try:
case.tearDown()
except (KeyboardInterrupt, SystemExit):
raise
except:
result.addError(case, sys.exc_info())
stop = time.time()
# first write since can freeze on shutting down processes
result.printErrors()
result.printSummary(start, stop)
self.config.plugins.finalize(result)
if thrownError is None:
log.debug("Tell all workers to stop")
for w in workers:
if w.is_alive():
testQueue.put('STOP', block=False)
# wait for the workers to end
for iworker,worker in enumerate(workers):
if worker.is_alive():
log.debug('joining worker %s',iworker)
worker.join()
if worker.is_alive():
log.debug('failed to join worker %s',iworker)
except (KeyboardInterrupt, SystemExit):
log.info('parent received ctrl-c when shutting down: stop all processes')
for worker in workers:
if worker.is_alive():
worker.terminate()
if thrownError: raise thrownError
else: raise
return result
def addtask(testQueue,tasks,case):
arg = None
if isinstance(case,nose.case.Test) and hasattr(case.test,'arg'):
# this removes the top level descriptor and allows real function
# name to be returned
case.test.descriptor = None
arg = case.test.arg
test_addr = MultiProcessTestRunner.address(case)
testQueue.put((test_addr,arg), block=False)
if arg is not None:
test_addr += str(arg)
if tasks is not None:
tasks.append(test_addr)
return test_addr
addtask = staticmethod(addtask)
def address(case):
if hasattr(case, 'address'):
file, mod, call = case.address()
elif hasattr(case, 'context'):
file, mod, call = test_address(case.context)
else:
raise Exception("Unable to convert %s to address" % case)
parts = []
if file is None:
if mod is None:
raise Exception("Unaddressable case %s" % case)
else:
parts.append(mod)
else:
# strip __init__.py(c) from end of file part
# if present, having it there confuses loader
dirname, basename = os.path.split(file)
if basename.startswith('__init__'):
file = dirname
parts.append(file)
if call is not None:
parts.append(call)
return ':'.join(map(str, parts))
address = staticmethod(address)
def nextBatch(self, test):
# allows tests or suites to mark themselves as not safe
# for multiprocess execution
if hasattr(test, 'context'):
if not getattr(test.context, '_multiprocess_', True):
return
if ((isinstance(test, ContextSuite)
and test.hasFixtures(self.checkCanSplit))
or not getattr(test, 'can_split', True)
or not isinstance(test, unittest.TestSuite)):
# regular test case, or a suite with context fixtures
# special case: when run like nosetests path/to/module.py
# the top-level suite has only one item, and it shares
# the same context as that item. In that case, we want the
# item, not the top-level suite
if isinstance(test, ContextSuite):
contained = list(test)
if (len(contained) == 1
and getattr(contained[0],
'context', None) == test.context):
test = contained[0]
yield test
else:
# Suite is without fixtures at this level; but it may have
# fixtures at any deeper level, so we need to examine it all
# the way down to the case level
for case in test:
for batch in self.nextBatch(case):
yield batch
def checkCanSplit(context, fixt):
"""
Callback that we use to check whether the fixtures found in a
context or ancestor are ones we care about.
Contexts can tell us that their fixtures are reentrant by setting
_multiprocess_can_split_. So if we see that, we return False to
disregard those fixtures.
"""
if not fixt:
return False
if getattr(context, '_multiprocess_can_split_', False):
return False
return True
checkCanSplit = staticmethod(checkCanSplit)
def sharedFixtures(self, case):
context = getattr(case, 'context', None)
if not context:
return False
return getattr(context, '_multiprocess_shared_', False)
def consolidate(self, result, batch_result):
log.debug("batch result is %s" , batch_result)
try:
output, testsRun, failures, errors, errorClasses = batch_result
except ValueError:
log.debug("result in unexpected format %s", batch_result)
failure.Failure(*sys.exc_info())(result)
return
self.stream.write(output)
result.testsRun += testsRun
result.failures.extend(failures)
result.errors.extend(errors)
for key, (storage, label, isfail) in errorClasses.items():
if key not in result.errorClasses:
# Ordinarily storage is result attribute
# but it's only processed through the errorClasses
# dict, so it's ok to fake it here
result.errorClasses[key] = ([], label, isfail)
mystorage, _junk, _junk = result.errorClasses[key]
mystorage.extend(storage)
log.debug("Ran %s tests (total: %s)", testsRun, result.testsRun)
def runner(ix, testQueue, resultQueue, currentaddr, currentstart,
keyboardCaught, shouldStop, loaderClass, resultClass, config):
try:
try:
return __runner(ix, testQueue, resultQueue, currentaddr, currentstart,
keyboardCaught, shouldStop, loaderClass, resultClass, config)
except KeyboardInterrupt:
log.debug('Worker %s keyboard interrupt, stopping',ix)
except Empty:
log.debug("Worker %s timed out waiting for tasks", ix)
def __runner(ix, testQueue, resultQueue, currentaddr, currentstart,
keyboardCaught, shouldStop, loaderClass, resultClass, config):
config = pickle.loads(config)
dummy_parser = config.parserClass()
if _instantiate_plugins is not None:
for pluginclass in _instantiate_plugins:
plugin = pluginclass()
plugin.addOptions(dummy_parser,{})
config.plugins.addPlugin(plugin)
config.plugins.configure(config.options,config)
config.plugins.begin()
log.debug("Worker %s executing, pid=%d", ix,os.getpid())
loader = loaderClass(config=config)
loader.suiteClass.suiteClass = NoSharedFixtureContextSuite
def get():
return testQueue.get(timeout=config.multiprocess_timeout)
def makeResult():
stream = _WritelnDecorator(StringIO())
result = resultClass(stream, descriptions=1,
verbosity=config.verbosity,
config=config)
plug_result = config.plugins.prepareTestResult(result)
if plug_result:
return plug_result
return result
def batch(result):
failures = [(TestLet(c), err) for c, err in result.failures]
errors = [(TestLet(c), err) for c, err in result.errors]
errorClasses = {}
for key, (storage, label, isfail) in result.errorClasses.items():
errorClasses[key] = ([(TestLet(c), err) for c, err in storage],
label, isfail)
return (
result.stream.getvalue(),
result.testsRun,
failures,
errors,
errorClasses)
for test_addr, arg in iter(get, 'STOP'):
if shouldStop.is_set():
log.exception('Worker %d STOPPED',ix)
break
result = makeResult()
test = loader.loadTestsFromNames([test_addr])
test.testQueue = testQueue
test.tasks = []
test.arg = arg
log.debug("Worker %s Test is %s (%s)", ix, test_addr, test)
try:
if arg is not None:
test_addr = test_addr + str(arg)
currentaddr.value = bytes_(test_addr)
currentstart.value = time.time()
test(result)
currentaddr.value = bytes_('')
resultQueue.put((ix, test_addr, test.tasks, batch(result)))
except KeyboardInterrupt, e: #TimedOutException:
timeout = isinstance(e, TimedOutException)
if timeout:
keyboardCaught.set()
if len(currentaddr.value):
if timeout:
msg = 'Worker %s timed out, failing current test %s'
else:
msg = 'Worker %s keyboard interrupt, failing current test %s'
log.exception(msg,ix,test_addr)
currentaddr.value = bytes_('')
failure.Failure(*sys.exc_info())(result)
resultQueue.put((ix, test_addr, test.tasks, batch(result)))
else:
if timeout:
msg = 'Worker %s test %s timed out'
else:
msg = 'Worker %s test %s keyboard interrupt'
log.debug(msg,ix,test_addr)
resultQueue.put((ix, test_addr, test.tasks, batch(result)))
if not timeout:
raise
except SystemExit:
currentaddr.value = bytes_('')
log.exception('Worker %s system exit',ix)
raise
except:
currentaddr.value = bytes_('')
log.exception("Worker %s error running test or returning "
"results",ix)
failure.Failure(*sys.exc_info())(result)
resultQueue.put((ix, test_addr, test.tasks, batch(result)))
if config.multiprocess_restartworker:
break
log.debug("Worker %s ending", ix)
class NoSharedFixtureContextSuite(ContextSuite):
"""
Context suite that never fires shared fixtures.
When a context sets _multiprocess_shared_, fixtures in that context
are executed by the main process. Using this suite class prevents them
from executing in the runner process as well.
"""
testQueue = None
tasks = None
arg = None
def setupContext(self, context):
if getattr(context, '_multiprocess_shared_', False):
return
super(NoSharedFixtureContextSuite, self).setupContext(context)
def teardownContext(self, context):
if getattr(context, '_multiprocess_shared_', False):
return
super(NoSharedFixtureContextSuite, self).teardownContext(context)
def run(self, result):
"""Run tests in suite inside of suite fixtures.
"""
# proxy the result for myself
log.debug("suite %s (%s) run called, tests: %s",
id(self), self, self._tests)
if self.resultProxy:
result, orig = self.resultProxy(result, self), result
else:
result, orig = result, result
try:
#log.debug('setUp for %s', id(self));
self.setUp()
except KeyboardInterrupt:
raise
except:
self.error_context = 'setup'
result.addError(self, self._exc_info())
return
try:
for test in self._tests:
if (isinstance(test,nose.case.Test)
and self.arg is not None):
test.test.arg = self.arg
else:
test.arg = self.arg
test.testQueue = self.testQueue
test.tasks = self.tasks
if result.shouldStop:
log.debug("stopping")
break
# each nose.case.Test will create its own result proxy
# so the cases need the original result, to avoid proxy
# chains
#log.debug('running test %s in suite %s', test, self);
try:
test(orig)
except KeyboardInterrupt, e:
timeout = isinstance(e, TimedOutException)
if timeout:
msg = 'Timeout when running test %s in suite %s'
else:
msg = 'KeyboardInterrupt when running test %s in suite %s'
log.debug(msg, test, self)
err = (TimedOutException,TimedOutException(str(test)),
sys.exc_info()[2])
test.config.plugins.addError(test,err)
orig.addError(test,err)
if not timeout:
raise
finally:
self.has_run = True
try:
#log.debug('tearDown for %s', id(self));
self.tearDown()
except KeyboardInterrupt:
raise
except:
self.error_context = 'teardown'
result.addError(self, self._exc_info())

416
lib/spack/external/nose/plugins/plugintest.py vendored Normal file
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@ -0,0 +1,416 @@
"""
Testing Plugins
===============
The plugin interface is well-tested enough to safely unit test your
use of its hooks with some level of confidence. However, there is also
a mixin for unittest.TestCase called PluginTester that's designed to
test plugins in their native runtime environment.
Here's a simple example with a do-nothing plugin and a composed suite.
>>> import unittest
>>> from nose.plugins import Plugin, PluginTester
>>> class FooPlugin(Plugin):
... pass
>>> class TestPluginFoo(PluginTester, unittest.TestCase):
... activate = '--with-foo'
... plugins = [FooPlugin()]
... def test_foo(self):
... for line in self.output:
... # i.e. check for patterns
... pass
...
... # or check for a line containing ...
... assert "ValueError" in self.output
... def makeSuite(self):
... class TC(unittest.TestCase):
... def runTest(self):
... raise ValueError("I hate foo")
... return [TC('runTest')]
...
>>> res = unittest.TestResult()
>>> case = TestPluginFoo('test_foo')
>>> _ = case(res)
>>> res.errors
[]
>>> res.failures
[]
>>> res.wasSuccessful()
True
>>> res.testsRun
1
And here is a more complex example of testing a plugin that has extra
arguments and reads environment variables.
>>> import unittest, os
>>> from nose.plugins import Plugin, PluginTester
>>> class FancyOutputter(Plugin):
... name = "fancy"
... def configure(self, options, conf):
... Plugin.configure(self, options, conf)
... if not self.enabled:
... return
... self.fanciness = 1
... if options.more_fancy:
... self.fanciness = 2
... if 'EVEN_FANCIER' in self.env:
... self.fanciness = 3
...
... def options(self, parser, env=os.environ):
... self.env = env
... parser.add_option('--more-fancy', action='store_true')
... Plugin.options(self, parser, env=env)
...
... def report(self, stream):
... stream.write("FANCY " * self.fanciness)
...
>>> class TestFancyOutputter(PluginTester, unittest.TestCase):
... activate = '--with-fancy' # enables the plugin
... plugins = [FancyOutputter()]
... args = ['--more-fancy']
... env = {'EVEN_FANCIER': '1'}
...
... def test_fancy_output(self):
... assert "FANCY FANCY FANCY" in self.output, (
... "got: %s" % self.output)
... def makeSuite(self):
... class TC(unittest.TestCase):
... def runTest(self):
... raise ValueError("I hate fancy stuff")
... return [TC('runTest')]
...
>>> res = unittest.TestResult()
>>> case = TestFancyOutputter('test_fancy_output')
>>> _ = case(res)
>>> res.errors
[]
>>> res.failures
[]
>>> res.wasSuccessful()
True
>>> res.testsRun
1
"""
import re
import sys
from warnings import warn
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
__all__ = ['PluginTester', 'run']
from os import getpid
class MultiProcessFile(object):
"""
helper for testing multiprocessing
multiprocessing poses a problem for doctests, since the strategy
of replacing sys.stdout/stderr with file-like objects then
inspecting the results won't work: the child processes will
write to the objects, but the data will not be reflected
in the parent doctest-ing process.
The solution is to create file-like objects which will interact with
multiprocessing in a more desirable way.
All processes can write to this object, but only the creator can read.
This allows the testing system to see a unified picture of I/O.
"""
def __init__(self):
# per advice at:
# http://docs.python.org/library/multiprocessing.html#all-platforms
self.__master = getpid()
self.__queue = Manager().Queue()
self.__buffer = StringIO()
self.softspace = 0
def buffer(self):
if getpid() != self.__master:
return
from Queue import Empty
from collections import defaultdict
cache = defaultdict(str)
while True:
try:
pid, data = self.__queue.get_nowait()
except Empty:
break
if pid == ():
#show parent output after children
#this is what users see, usually
pid = ( 1e100, ) # googol!
cache[pid] += data
for pid in sorted(cache):
#self.__buffer.write( '%s wrote: %r\n' % (pid, cache[pid]) ) #DEBUG
self.__buffer.write( cache[pid] )
def write(self, data):
# note that these pids are in the form of current_process()._identity
# rather than OS pids
from multiprocessing import current_process
pid = current_process()._identity
self.__queue.put((pid, data))
def __iter__(self):
"getattr doesn't work for iter()"
self.buffer()
return self.__buffer
def seek(self, offset, whence=0):
self.buffer()
return self.__buffer.seek(offset, whence)
def getvalue(self):
self.buffer()
return self.__buffer.getvalue()
def __getattr__(self, attr):
return getattr(self.__buffer, attr)
try:
from multiprocessing import Manager
Buffer = MultiProcessFile
except ImportError:
Buffer = StringIO
class PluginTester(object):
"""A mixin for testing nose plugins in their runtime environment.
Subclass this and mix in unittest.TestCase to run integration/functional
tests on your plugin. When setUp() is called, the stub test suite is
executed with your plugin so that during an actual test you can inspect the
artifacts of how your plugin interacted with the stub test suite.
- activate
- the argument to send nosetests to activate the plugin
- suitepath
- if set, this is the path of the suite to test. Otherwise, you
will need to use the hook, makeSuite()
- plugins
- the list of plugins to make available during the run. Note
that this does not mean these plugins will be *enabled* during
the run -- only the plugins enabled by the activate argument
or other settings in argv or env will be enabled.
- args
- a list of arguments to add to the nosetests command, in addition to
the activate argument
- env
- optional dict of environment variables to send nosetests
"""
activate = None
suitepath = None
args = None
env = {}
argv = None
plugins = []
ignoreFiles = None
def makeSuite(self):
"""returns a suite object of tests to run (unittest.TestSuite())
If self.suitepath is None, this must be implemented. The returned suite
object will be executed with all plugins activated. It may return
None.
Here is an example of a basic suite object you can return ::
>>> import unittest
>>> class SomeTest(unittest.TestCase):
... def runTest(self):
... raise ValueError("Now do something, plugin!")
...
>>> unittest.TestSuite([SomeTest()]) # doctest: +ELLIPSIS
<unittest...TestSuite tests=[<...SomeTest testMethod=runTest>]>
"""
raise NotImplementedError
def _execPlugin(self):
"""execute the plugin on the internal test suite.
"""
from nose.config import Config
from nose.core import TestProgram
from nose.plugins.manager import PluginManager
suite = None
stream = Buffer()
conf = Config(env=self.env,
stream=stream,
plugins=PluginManager(plugins=self.plugins))
if self.ignoreFiles is not None:
conf.ignoreFiles = self.ignoreFiles
if not self.suitepath:
suite = self.makeSuite()
self.nose = TestProgram(argv=self.argv, config=conf, suite=suite,
exit=False)
self.output = AccessDecorator(stream)
def setUp(self):
"""runs nosetests with the specified test suite, all plugins
activated.
"""
self.argv = ['nosetests', self.activate]
if self.args:
self.argv.extend(self.args)
if self.suitepath:
self.argv.append(self.suitepath)
self._execPlugin()
class AccessDecorator(object):
stream = None
_buf = None
def __init__(self, stream):
self.stream = stream
stream.seek(0)
self._buf = stream.read()
stream.seek(0)
def __contains__(self, val):
return val in self._buf
def __iter__(self):
return iter(self.stream)
def __str__(self):
return self._buf
def blankline_separated_blocks(text):
"a bunch of === characters is also considered a blank line"
block = []
for line in text.splitlines(True):
block.append(line)
line = line.strip()
if not line or line.startswith('===') and not line.strip('='):
yield "".join(block)
block = []
if block:
yield "".join(block)
def remove_stack_traces(out):
# this regexp taken from Python 2.5's doctest
traceback_re = re.compile(r"""
# Grab the traceback header. Different versions of Python have
# said different things on the first traceback line.
^(?P<hdr> Traceback\ \(
(?: most\ recent\ call\ last
| innermost\ last
) \) :
)
\s* $ # toss trailing whitespace on the header.
(?P<stack> .*?) # don't blink: absorb stuff until...
^(?=\w) # a line *starts* with alphanum.
.*?(?P<exception> \w+ ) # exception name
(?P<msg> [:\n] .*) # the rest
""", re.VERBOSE | re.MULTILINE | re.DOTALL)
blocks = []
for block in blankline_separated_blocks(out):
blocks.append(traceback_re.sub(r"\g<hdr>\n...\n\g<exception>\g<msg>", block))
return "".join(blocks)
def simplify_warnings(out):
warn_re = re.compile(r"""
# Cut the file and line no, up to the warning name
^.*:\d+:\s
(?P<category>\w+): \s+ # warning category
(?P<detail>.+) $ \n? # warning message
^ .* $ # stack frame
""", re.VERBOSE | re.MULTILINE)
return warn_re.sub(r"\g<category>: \g<detail>", out)
def remove_timings(out):
return re.sub(
r"Ran (\d+ tests?) in [0-9.]+s", r"Ran \1 in ...s", out)
def munge_nose_output_for_doctest(out):
"""Modify nose output to make it easy to use in doctests."""
out = remove_stack_traces(out)
out = simplify_warnings(out)
out = remove_timings(out)
return out.strip()
def run(*arg, **kw):
"""
Specialized version of nose.run for use inside of doctests that
test test runs.
This version of run() prints the result output to stdout. Before
printing, the output is processed by replacing the timing
information with an ellipsis (...), removing traceback stacks, and
removing trailing whitespace.
Use this version of run wherever you are writing a doctest that
tests nose (or unittest) test result output.
Note: do not use doctest: +ELLIPSIS when testing nose output,
since ellipses ("test_foo ... ok") in your expected test runner
output may match multiple lines of output, causing spurious test
passes!
"""
from nose import run
from nose.config import Config
from nose.plugins.manager import PluginManager
buffer = Buffer()
if 'config' not in kw:
plugins = kw.pop('plugins', [])
if isinstance(plugins, list):
plugins = PluginManager(plugins=plugins)
env = kw.pop('env', {})
kw['config'] = Config(env=env, plugins=plugins)
if 'argv' not in kw:
kw['argv'] = ['nosetests', '-v']
kw['config'].stream = buffer
# Set up buffering so that all output goes to our buffer,
# or warn user if deprecated behavior is active. If this is not
# done, prints and warnings will either be out of place or
# disappear.
stderr = sys.stderr
stdout = sys.stdout
if kw.pop('buffer_all', False):
sys.stdout = sys.stderr = buffer
restore = True
else:
restore = False
warn("The behavior of nose.plugins.plugintest.run() will change in "
"the next release of nose. The current behavior does not "
"correctly account for output to stdout and stderr. To enable "
"correct behavior, use run_buffered() instead, or pass "
"the keyword argument buffer_all=True to run().",
DeprecationWarning, stacklevel=2)
try:
run(*arg, **kw)
finally:
if restore:
sys.stderr = stderr
sys.stdout = stdout
out = buffer.getvalue()
print munge_nose_output_for_doctest(out)
def run_buffered(*arg, **kw):
kw['buffer_all'] = True
run(*arg, **kw)
if __name__ == '__main__':
import doctest
doctest.testmod()

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"""This plugin will run tests using the hotshot profiler, which is part
of the standard library. To turn it on, use the ``--with-profile`` option
or set the NOSE_WITH_PROFILE environment variable. Profiler output can be
controlled with the ``--profile-sort`` and ``--profile-restrict`` options,
and the profiler output file may be changed with ``--profile-stats-file``.
See the `hotshot documentation`_ in the standard library documentation for
more details on the various output options.
.. _hotshot documentation: http://docs.python.org/library/hotshot.html
"""
try:
import hotshot
from hotshot import stats
except ImportError:
hotshot, stats = None, None
import logging
import os
import sys
import tempfile
from nose.plugins.base import Plugin
from nose.util import tolist
log = logging.getLogger('nose.plugins')
class Profile(Plugin):
"""
Use this plugin to run tests using the hotshot profiler.
"""
pfile = None
clean_stats_file = False
def options(self, parser, env):
"""Register commandline options.
"""
if not self.available():
return
Plugin.options(self, parser, env)
parser.add_option('--profile-sort', action='store', dest='profile_sort',
default=env.get('NOSE_PROFILE_SORT', 'cumulative'),
metavar="SORT",
help="Set sort order for profiler output")
parser.add_option('--profile-stats-file', action='store',
dest='profile_stats_file',
metavar="FILE",
default=env.get('NOSE_PROFILE_STATS_FILE'),
help='Profiler stats file; default is a new '
'temp file on each run')
parser.add_option('--profile-restrict', action='append',
dest='profile_restrict',
metavar="RESTRICT",
default=env.get('NOSE_PROFILE_RESTRICT'),
help="Restrict profiler output. See help for "
"pstats.Stats for details")
def available(cls):
return hotshot is not None
available = classmethod(available)
def begin(self):
"""Create profile stats file and load profiler.
"""
if not self.available():
return
self._create_pfile()
self.prof = hotshot.Profile(self.pfile)
def configure(self, options, conf):
"""Configure plugin.
"""
if not self.available():
self.enabled = False
return
Plugin.configure(self, options, conf)
self.conf = conf
if options.profile_stats_file:
self.pfile = options.profile_stats_file
self.clean_stats_file = False
else:
self.pfile = None
self.clean_stats_file = True
self.fileno = None
self.sort = options.profile_sort
self.restrict = tolist(options.profile_restrict)
def prepareTest(self, test):
"""Wrap entire test run in :func:`prof.runcall`.
"""
if not self.available():
return
log.debug('preparing test %s' % test)
def run_and_profile(result, prof=self.prof, test=test):
self._create_pfile()
prof.runcall(test, result)
return run_and_profile
def report(self, stream):
"""Output profiler report.
"""
log.debug('printing profiler report')
self.prof.close()
prof_stats = stats.load(self.pfile)
prof_stats.sort_stats(self.sort)
# 2.5 has completely different stream handling from 2.4 and earlier.
# Before 2.5, stats objects have no stream attribute; in 2.5 and later
# a reference sys.stdout is stored before we can tweak it.
compat_25 = hasattr(prof_stats, 'stream')
if compat_25:
tmp = prof_stats.stream
prof_stats.stream = stream
else:
tmp = sys.stdout
sys.stdout = stream
try:
if self.restrict:
log.debug('setting profiler restriction to %s', self.restrict)
prof_stats.print_stats(*self.restrict)
else:
prof_stats.print_stats()
finally:
if compat_25:
prof_stats.stream = tmp
else:
sys.stdout = tmp
def finalize(self, result):
"""Clean up stats file, if configured to do so.
"""
if not self.available():
return
try:
self.prof.close()
except AttributeError:
# TODO: is this trying to catch just the case where not
# hasattr(self.prof, "close")? If so, the function call should be
# moved out of the try: suite.
pass
if self.clean_stats_file:
if self.fileno:
try:
os.close(self.fileno)
except OSError:
pass
try:
os.unlink(self.pfile)
except OSError:
pass
return None
def _create_pfile(self):
if not self.pfile:
self.fileno, self.pfile = tempfile.mkstemp()
self.clean_stats_file = True

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"""
This plugin installs a SKIP error class for the SkipTest exception.
When SkipTest is raised, the exception will be logged in the skipped
attribute of the result, 'S' or 'SKIP' (verbose) will be output, and
the exception will not be counted as an error or failure. This plugin
is enabled by default but may be disabled with the ``--no-skip`` option.
"""
from nose.plugins.errorclass import ErrorClass, ErrorClassPlugin
# on SkipTest:
# - unittest SkipTest is first preference, but it's only available
# for >= 2.7
# - unittest2 SkipTest is second preference for older pythons. This
# mirrors logic for choosing SkipTest exception in testtools
# - if none of the above, provide custom class
try:
from unittest.case import SkipTest
except ImportError:
try:
from unittest2.case import SkipTest
except ImportError:
class SkipTest(Exception):
"""Raise this exception to mark a test as skipped.
"""
pass
class Skip(ErrorClassPlugin):
"""
Plugin that installs a SKIP error class for the SkipTest
exception. When SkipTest is raised, the exception will be logged
in the skipped attribute of the result, 'S' or 'SKIP' (verbose)
will be output, and the exception will not be counted as an error
or failure.
"""
enabled = True
skipped = ErrorClass(SkipTest,
label='SKIP',
isfailure=False)
def options(self, parser, env):
"""
Add my options to command line.
"""
env_opt = 'NOSE_WITHOUT_SKIP'
parser.add_option('--no-skip', action='store_true',
dest='noSkip', default=env.get(env_opt, False),
help="Disable special handling of SkipTest "
"exceptions.")
def configure(self, options, conf):
"""
Configure plugin. Skip plugin is enabled by default.
"""
if not self.can_configure:
return
self.conf = conf
disable = getattr(options, 'noSkip', False)
if disable:
self.enabled = False

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"""
This plugin adds a test id (like #1) to each test name output. After
you've run once to generate test ids, you can re-run individual
tests by activating the plugin and passing the ids (with or
without the # prefix) instead of test names.
For example, if your normal test run looks like::
% nosetests -v
tests.test_a ... ok
tests.test_b ... ok
tests.test_c ... ok
When adding ``--with-id`` you'll see::
% nosetests -v --with-id
#1 tests.test_a ... ok
#2 tests.test_b ... ok
#3 tests.test_c ... ok
Then you can re-run individual tests by supplying just an id number::
% nosetests -v --with-id 2
#2 tests.test_b ... ok
You can also pass multiple id numbers::
% nosetests -v --with-id 2 3
#2 tests.test_b ... ok
#3 tests.test_c ... ok
Since most shells consider '#' a special character, you can leave it out when
specifying a test id.
Note that when run without the -v switch, no special output is displayed, but
the ids file is still written.
Looping over failed tests
-------------------------
This plugin also adds a mode that will direct the test runner to record
failed tests. Subsequent test runs will then run only the tests that failed
last time. Activate this mode with the ``--failed`` switch::
% nosetests -v --failed
#1 test.test_a ... ok
#2 test.test_b ... ERROR
#3 test.test_c ... FAILED
#4 test.test_d ... ok
On the second run, only tests #2 and #3 will run::
% nosetests -v --failed
#2 test.test_b ... ERROR
#3 test.test_c ... FAILED
As you correct errors and tests pass, they'll drop out of subsequent runs.
First::
% nosetests -v --failed
#2 test.test_b ... ok
#3 test.test_c ... FAILED
Second::
% nosetests -v --failed
#3 test.test_c ... FAILED
When all tests pass, the full set will run on the next invocation.
First::
% nosetests -v --failed
#3 test.test_c ... ok
Second::
% nosetests -v --failed
#1 test.test_a ... ok
#2 test.test_b ... ok
#3 test.test_c ... ok
#4 test.test_d ... ok
.. note ::
If you expect to use ``--failed`` regularly, it's a good idea to always run
using the ``--with-id`` option. This will ensure that an id file is always
created, allowing you to add ``--failed`` to the command line as soon as
you have failing tests. Otherwise, your first run using ``--failed`` will
(perhaps surprisingly) run *all* tests, because there won't be an id file
containing the record of failed tests from your previous run.
"""
__test__ = False
import logging
import os
from nose.plugins import Plugin
from nose.util import src, set
try:
from cPickle import dump, load
except ImportError:
from pickle import dump, load
log = logging.getLogger(__name__)
class TestId(Plugin):
"""
Activate to add a test id (like #1) to each test name output. Activate
with --failed to rerun failing tests only.
"""
name = 'id'
idfile = None
collecting = True
loopOnFailed = False
def options(self, parser, env):
"""Register commandline options.
"""
Plugin.options(self, parser, env)
parser.add_option('--id-file', action='store', dest='testIdFile',
default='.noseids', metavar="FILE",
help="Store test ids found in test runs in this "
"file. Default is the file .noseids in the "
"working directory.")
parser.add_option('--failed', action='store_true',
dest='failed', default=False,
help="Run the tests that failed in the last "
"test run.")
def configure(self, options, conf):
"""Configure plugin.
"""
Plugin.configure(self, options, conf)
if options.failed:
self.enabled = True
self.loopOnFailed = True
log.debug("Looping on failed tests")
self.idfile = os.path.expanduser(options.testIdFile)
if not os.path.isabs(self.idfile):
self.idfile = os.path.join(conf.workingDir, self.idfile)
self.id = 1
# Ids and tests are mirror images: ids are {id: test address} and
# tests are {test address: id}
self.ids = {}
self.tests = {}
self.failed = []
self.source_names = []
# used to track ids seen when tests is filled from
# loaded ids file
self._seen = {}
self._write_hashes = conf.verbosity >= 2
def finalize(self, result):
"""Save new ids file, if needed.
"""
if result.wasSuccessful():
self.failed = []
if self.collecting:
ids = dict(list(zip(list(self.tests.values()), list(self.tests.keys()))))
else:
ids = self.ids
fh = open(self.idfile, 'wb')
dump({'ids': ids,
'failed': self.failed,
'source_names': self.source_names}, fh)
fh.close()
log.debug('Saved test ids: %s, failed %s to %s',
ids, self.failed, self.idfile)
def loadTestsFromNames(self, names, module=None):
"""Translate ids in the list of requested names into their
test addresses, if they are found in my dict of tests.
"""
log.debug('ltfn %s %s', names, module)
try:
fh = open(self.idfile, 'rb')
data = load(fh)
if 'ids' in data:
self.ids = data['ids']
self.failed = data['failed']
self.source_names = data['source_names']
else:
# old ids field
self.ids = data
self.failed = []
self.source_names = names
if self.ids:
self.id = max(self.ids) + 1
self.tests = dict(list(zip(list(self.ids.values()), list(self.ids.keys()))))
else:
self.id = 1
log.debug(
'Loaded test ids %s tests %s failed %s sources %s from %s',
self.ids, self.tests, self.failed, self.source_names,
self.idfile)
fh.close()
except ValueError, e:
# load() may throw a ValueError when reading the ids file, if it
# was generated with a newer version of Python than we are currently
# running.
log.debug('Error loading %s : %s', self.idfile, str(e))
except IOError:
log.debug('IO error reading %s', self.idfile)
if self.loopOnFailed and self.failed:
self.collecting = False
names = self.failed
self.failed = []
# I don't load any tests myself, only translate names like '#2'
# into the associated test addresses
translated = []
new_source = []
really_new = []
for name in names:
trans = self.tr(name)
if trans != name:
translated.append(trans)
else:
new_source.append(name)
# names that are not ids and that are not in the current
# list of source names go into the list for next time
if new_source:
new_set = set(new_source)
old_set = set(self.source_names)
log.debug("old: %s new: %s", old_set, new_set)
really_new = [s for s in new_source
if not s in old_set]
if really_new:
# remember new sources
self.source_names.extend(really_new)
if not translated:
# new set of source names, no translations
# means "run the requested tests"
names = new_source
else:
# no new names to translate and add to id set
self.collecting = False
log.debug("translated: %s new sources %s names %s",
translated, really_new, names)
return (None, translated + really_new or names)
def makeName(self, addr):
log.debug("Make name %s", addr)
filename, module, call = addr
if filename is not None:
head = src(filename)
else:
head = module
if call is not None:
return "%s:%s" % (head, call)
return head
def setOutputStream(self, stream):
"""Get handle on output stream so the plugin can print id #s
"""
self.stream = stream
def startTest(self, test):
"""Maybe output an id # before the test name.
Example output::
#1 test.test ... ok
#2 test.test_two ... ok
"""
adr = test.address()
log.debug('start test %s (%s)', adr, adr in self.tests)
if adr in self.tests:
if adr in self._seen:
self.write(' ')
else:
self.write('#%s ' % self.tests[adr])
self._seen[adr] = 1
return
self.tests[adr] = self.id
self.write('#%s ' % self.id)
self.id += 1
def afterTest(self, test):
# None means test never ran, False means failed/err
if test.passed is False:
try:
key = str(self.tests[test.address()])
except KeyError:
# never saw this test -- startTest didn't run
pass
else:
if key not in self.failed:
self.failed.append(key)
def tr(self, name):
log.debug("tr '%s'", name)
try:
key = int(name.replace('#', ''))
except ValueError:
return name
log.debug("Got key %s", key)
# I'm running tests mapped from the ids file,
# not collecting new ones
if key in self.ids:
return self.makeName(self.ids[key])
return name
def write(self, output):
if self._write_hashes:
self.stream.write(output)

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"""This plugin provides test results in the standard XUnit XML format.
It's designed for the `Jenkins`_ (previously Hudson) continuous build
system, but will probably work for anything else that understands an
XUnit-formatted XML representation of test results.
Add this shell command to your builder ::
nosetests --with-xunit
And by default a file named nosetests.xml will be written to the
working directory.
In a Jenkins builder, tick the box named "Publish JUnit test result report"
under the Post-build Actions and enter this value for Test report XMLs::
**/nosetests.xml
If you need to change the name or location of the file, you can set the
``--xunit-file`` option.
If you need to change the name of the test suite, you can set the
``--xunit-testsuite-name`` option.
Here is an abbreviated version of what an XML test report might look like::
<?xml version="1.0" encoding="UTF-8"?>
<testsuite name="nosetests" tests="1" errors="1" failures="0" skip="0">
<testcase classname="path_to_test_suite.TestSomething"
name="test_it" time="0">
<error type="exceptions.TypeError" message="oops, wrong type">
Traceback (most recent call last):
...
TypeError: oops, wrong type
</error>
</testcase>
</testsuite>
.. _Jenkins: http://jenkins-ci.org/
"""
import codecs
import doctest
import os
import sys
import traceback
import re
import inspect
from StringIO import StringIO
from time import time
from xml.sax import saxutils
from nose.plugins.base import Plugin
from nose.exc import SkipTest
from nose.pyversion import force_unicode, format_exception
# Invalid XML characters, control characters 0-31 sans \t, \n and \r
CONTROL_CHARACTERS = re.compile(r"[\000-\010\013\014\016-\037]")
TEST_ID = re.compile(r'^(.*?)(\(.*\))$')
def xml_safe(value):
"""Replaces invalid XML characters with '?'."""
return CONTROL_CHARACTERS.sub('?', value)
def escape_cdata(cdata):
"""Escape a string for an XML CDATA section."""
return xml_safe(cdata).replace(']]>', ']]>]]&gt;<![CDATA[')
def id_split(idval):
m = TEST_ID.match(idval)
if m:
name, fargs = m.groups()
head, tail = name.rsplit(".", 1)
return [head, tail+fargs]
else:
return idval.rsplit(".", 1)
def nice_classname(obj):
"""Returns a nice name for class object or class instance.
>>> nice_classname(Exception()) # doctest: +ELLIPSIS
'...Exception'
>>> nice_classname(Exception) # doctest: +ELLIPSIS
'...Exception'
"""
if inspect.isclass(obj):
cls_name = obj.__name__
else:
cls_name = obj.__class__.__name__
mod = inspect.getmodule(obj)
if mod:
name = mod.__name__
# jython
if name.startswith('org.python.core.'):
name = name[len('org.python.core.'):]
return "%s.%s" % (name, cls_name)
else:
return cls_name
def exc_message(exc_info):
"""Return the exception's message."""
exc = exc_info[1]
if exc is None:
# str exception
result = exc_info[0]
else:
try:
result = str(exc)
except UnicodeEncodeError:
try:
result = unicode(exc)
except UnicodeError:
# Fallback to args as neither str nor
# unicode(Exception(u'\xe6')) work in Python < 2.6
result = exc.args[0]
result = force_unicode(result, 'UTF-8')
return xml_safe(result)
class Tee(object):
def __init__(self, encoding, *args):
self._encoding = encoding
self._streams = args
def write(self, data):
data = force_unicode(data, self._encoding)
for s in self._streams:
s.write(data)
def writelines(self, lines):
for line in lines:
self.write(line)
def flush(self):
for s in self._streams:
s.flush()
def isatty(self):
return False
class Xunit(Plugin):
"""This plugin provides test results in the standard XUnit XML format."""
name = 'xunit'
score = 1500
encoding = 'UTF-8'
error_report_file = None
def __init__(self):
super(Xunit, self).__init__()
self._capture_stack = []
self._currentStdout = None
self._currentStderr = None
def _timeTaken(self):
if hasattr(self, '_timer'):
taken = time() - self._timer
else:
# test died before it ran (probably error in setup())
# or success/failure added before test started probably
# due to custom TestResult munging
taken = 0.0
return taken
def _quoteattr(self, attr):
"""Escape an XML attribute. Value can be unicode."""
attr = xml_safe(attr)
return saxutils.quoteattr(attr)
def options(self, parser, env):
"""Sets additional command line options."""
Plugin.options(self, parser, env)
parser.add_option(
'--xunit-file', action='store',
dest='xunit_file', metavar="FILE",
default=env.get('NOSE_XUNIT_FILE', 'nosetests.xml'),
help=("Path to xml file to store the xunit report in. "
"Default is nosetests.xml in the working directory "
"[NOSE_XUNIT_FILE]"))
parser.add_option(
'--xunit-testsuite-name', action='store',
dest='xunit_testsuite_name', metavar="PACKAGE",
default=env.get('NOSE_XUNIT_TESTSUITE_NAME', 'nosetests'),
help=("Name of the testsuite in the xunit xml, generated by plugin. "
"Default test suite name is nosetests."))
def configure(self, options, config):
"""Configures the xunit plugin."""
Plugin.configure(self, options, config)
self.config = config
if self.enabled:
self.stats = {'errors': 0,
'failures': 0,
'passes': 0,
'skipped': 0
}
self.errorlist = []
self.error_report_file_name = os.path.realpath(options.xunit_file)
self.xunit_testsuite_name = options.xunit_testsuite_name
def report(self, stream):
"""Writes an Xunit-formatted XML file
The file includes a report of test errors and failures.
"""
self.error_report_file = codecs.open(self.error_report_file_name, 'w',
self.encoding, 'replace')
self.stats['encoding'] = self.encoding
self.stats['testsuite_name'] = self.xunit_testsuite_name
self.stats['total'] = (self.stats['errors'] + self.stats['failures']
+ self.stats['passes'] + self.stats['skipped'])
self.error_report_file.write(
u'<?xml version="1.0" encoding="%(encoding)s"?>'
u'<testsuite name="%(testsuite_name)s" tests="%(total)d" '
u'errors="%(errors)d" failures="%(failures)d" '
u'skip="%(skipped)d">' % self.stats)
self.error_report_file.write(u''.join([force_unicode(e, self.encoding)
for e in self.errorlist]))
self.error_report_file.write(u'</testsuite>')
self.error_report_file.close()
if self.config.verbosity > 1:
stream.writeln("-" * 70)
stream.writeln("XML: %s" % self.error_report_file.name)
def _startCapture(self):
self._capture_stack.append((sys.stdout, sys.stderr))
self._currentStdout = StringIO()
self._currentStderr = StringIO()
sys.stdout = Tee(self.encoding, self._currentStdout, sys.stdout)
sys.stderr = Tee(self.encoding, self._currentStderr, sys.stderr)
def startContext(self, context):
self._startCapture()
def stopContext(self, context):
self._endCapture()
def beforeTest(self, test):
"""Initializes a timer before starting a test."""
self._timer = time()
self._startCapture()
def _endCapture(self):
if self._capture_stack:
sys.stdout, sys.stderr = self._capture_stack.pop()
def afterTest(self, test):
self._endCapture()
self._currentStdout = None
self._currentStderr = None
def finalize(self, test):
while self._capture_stack:
self._endCapture()
def _getCapturedStdout(self):
if self._currentStdout:
value = self._currentStdout.getvalue()
if value:
return '<system-out><![CDATA[%s]]></system-out>' % escape_cdata(
value)
return ''
def _getCapturedStderr(self):
if self._currentStderr:
value = self._currentStderr.getvalue()
if value:
return '<system-err><![CDATA[%s]]></system-err>' % escape_cdata(
value)
return ''
def addError(self, test, err, capt=None):
"""Add error output to Xunit report.
"""
taken = self._timeTaken()
if issubclass(err[0], SkipTest):
type = 'skipped'
self.stats['skipped'] += 1
else:
type = 'error'
self.stats['errors'] += 1
tb = format_exception(err, self.encoding)
id = test.id()
self.errorlist.append(
u'<testcase classname=%(cls)s name=%(name)s time="%(taken).3f">'
u'<%(type)s type=%(errtype)s message=%(message)s><![CDATA[%(tb)s]]>'
u'</%(type)s>%(systemout)s%(systemerr)s</testcase>' %
{'cls': self._quoteattr(id_split(id)[0]),
'name': self._quoteattr(id_split(id)[-1]),
'taken': taken,
'type': type,
'errtype': self._quoteattr(nice_classname(err[0])),
'message': self._quoteattr(exc_message(err)),
'tb': escape_cdata(tb),
'systemout': self._getCapturedStdout(),
'systemerr': self._getCapturedStderr(),
})
def addFailure(self, test, err, capt=None, tb_info=None):
"""Add failure output to Xunit report.
"""
taken = self._timeTaken()
tb = format_exception(err, self.encoding)
self.stats['failures'] += 1
id = test.id()
self.errorlist.append(
u'<testcase classname=%(cls)s name=%(name)s time="%(taken).3f">'
u'<failure type=%(errtype)s message=%(message)s><![CDATA[%(tb)s]]>'
u'</failure>%(systemout)s%(systemerr)s</testcase>' %
{'cls': self._quoteattr(id_split(id)[0]),
'name': self._quoteattr(id_split(id)[-1]),
'taken': taken,
'errtype': self._quoteattr(nice_classname(err[0])),
'message': self._quoteattr(exc_message(err)),
'tb': escape_cdata(tb),
'systemout': self._getCapturedStdout(),
'systemerr': self._getCapturedStderr(),
})
def addSuccess(self, test, capt=None):
"""Add success output to Xunit report.
"""
taken = self._timeTaken()
self.stats['passes'] += 1
id = test.id()
self.errorlist.append(
'<testcase classname=%(cls)s name=%(name)s '
'time="%(taken).3f">%(systemout)s%(systemerr)s</testcase>' %
{'cls': self._quoteattr(id_split(id)[0]),
'name': self._quoteattr(id_split(id)[-1]),
'taken': taken,
'systemout': self._getCapturedStdout(),
'systemerr': self._getCapturedStderr(),
})

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"""
Result Proxy
------------
The result proxy wraps the result instance given to each test. It
performs two functions: enabling extended error/failure reporting
and calling plugins.
As each result event is fired, plugins are called with the same event;
however, plugins are called with the nose.case.Test instance that
wraps the actual test. So when a test fails and calls
result.addFailure(self, err), the result proxy calls
addFailure(self.test, err) for each plugin. This allows plugins to
have a single stable interface for all test types, and also to
manipulate the test object itself by setting the `test` attribute of
the nose.case.Test that they receive.
"""
import logging
from nose.config import Config
log = logging.getLogger(__name__)
def proxied_attribute(local_attr, proxied_attr, doc):
"""Create a property that proxies attribute ``proxied_attr`` through
the local attribute ``local_attr``.
"""
def fget(self):
return getattr(getattr(self, local_attr), proxied_attr)
def fset(self, value):
setattr(getattr(self, local_attr), proxied_attr, value)
def fdel(self):
delattr(getattr(self, local_attr), proxied_attr)
return property(fget, fset, fdel, doc)
class ResultProxyFactory(object):
"""Factory for result proxies. Generates a ResultProxy bound to each test
and the result passed to the test.
"""
def __init__(self, config=None):
if config is None:
config = Config()
self.config = config
self.__prepared = False
self.__result = None
def __call__(self, result, test):
"""Return a ResultProxy for the current test.
On first call, plugins are given a chance to replace the
result used for the remaining tests. If a plugin returns a
value from prepareTestResult, that object will be used as the
result for all tests.
"""
if not self.__prepared:
self.__prepared = True
plug_result = self.config.plugins.prepareTestResult(result)
if plug_result is not None:
self.__result = result = plug_result
if self.__result is not None:
result = self.__result
return ResultProxy(result, test, config=self.config)
class ResultProxy(object):
"""Proxy to TestResults (or other results handler).
One ResultProxy is created for each nose.case.Test. The result
proxy calls plugins with the nose.case.Test instance (instead of
the wrapped test case) as each result call is made. Finally, the
real result method is called, also with the nose.case.Test
instance as the test parameter.
"""
def __init__(self, result, test, config=None):
if config is None:
config = Config()
self.config = config
self.plugins = config.plugins
self.result = result
self.test = test
def __repr__(self):
return repr(self.result)
def _prepareErr(self, err):
if not isinstance(err[1], Exception) and isinstance(err[0], type):
# Turn value back into an Exception (required in Python 3.x).
# Plugins do all sorts of crazy things with exception values.
# Convert it to a custom subclass of Exception with the same
# name as the actual exception to make it print correctly.
value = type(err[0].__name__, (Exception,), {})(err[1])
err = (err[0], value, err[2])
return err
def assertMyTest(self, test):
# The test I was called with must be my .test or my
# .test's .test. or my .test.test's .case
case = getattr(self.test, 'test', None)
assert (test is self.test
or test is case
or test is getattr(case, '_nose_case', None)), (
"ResultProxy for %r (%s) was called with test %r (%s)"
% (self.test, id(self.test), test, id(test)))
def afterTest(self, test):
self.assertMyTest(test)
self.plugins.afterTest(self.test)
if hasattr(self.result, "afterTest"):
self.result.afterTest(self.test)
def beforeTest(self, test):
self.assertMyTest(test)
self.plugins.beforeTest(self.test)
if hasattr(self.result, "beforeTest"):
self.result.beforeTest(self.test)
def addError(self, test, err):
self.assertMyTest(test)
plugins = self.plugins
plugin_handled = plugins.handleError(self.test, err)
if plugin_handled:
return
# test.passed is set in result, to account for error classes
formatted = plugins.formatError(self.test, err)
if formatted is not None:
err = formatted
plugins.addError(self.test, err)
self.result.addError(self.test, self._prepareErr(err))
if not self.result.wasSuccessful() and self.config.stopOnError:
self.shouldStop = True
def addFailure(self, test, err):
self.assertMyTest(test)
plugins = self.plugins
plugin_handled = plugins.handleFailure(self.test, err)
if plugin_handled:
return
self.test.passed = False
formatted = plugins.formatFailure(self.test, err)
if formatted is not None:
err = formatted
plugins.addFailure(self.test, err)
self.result.addFailure(self.test, self._prepareErr(err))
if self.config.stopOnError:
self.shouldStop = True
def addSkip(self, test, reason):
# 2.7 compat shim
from nose.plugins.skip import SkipTest
self.assertMyTest(test)
plugins = self.plugins
if not isinstance(reason, Exception):
# for Python 3.2+
reason = Exception(reason)
plugins.addError(self.test, (SkipTest, reason, None))
self.result.addSkip(self.test, reason)
def addSuccess(self, test):
self.assertMyTest(test)
self.plugins.addSuccess(self.test)
self.result.addSuccess(self.test)
def startTest(self, test):
self.assertMyTest(test)
self.plugins.startTest(self.test)
self.result.startTest(self.test)
def stop(self):
self.result.stop()
def stopTest(self, test):
self.assertMyTest(test)
self.plugins.stopTest(self.test)
self.result.stopTest(self.test)
# proxied attributes
shouldStop = proxied_attribute('result', 'shouldStop',
"""Should the test run stop?""")
errors = proxied_attribute('result', 'errors',
"""Tests that raised an exception""")
failures = proxied_attribute('result', 'failures',
"""Tests that failed""")
testsRun = proxied_attribute('result', 'testsRun',
"""Number of tests run""")

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"""
This module contains fixups for using nose under different versions of Python.
"""
import sys
import os
import traceback
import types
import inspect
import nose.util
__all__ = ['make_instancemethod', 'cmp_to_key', 'sort_list', 'ClassType',
'TypeType', 'UNICODE_STRINGS', 'unbound_method', 'ismethod',
'bytes_', 'is_base_exception', 'force_unicode', 'exc_to_unicode',
'format_exception']
# In Python 3.x, all strings are unicode (the call to 'unicode()' in the 2.x
# source will be replaced with 'str()' when running 2to3, so this test will
# then become true)
UNICODE_STRINGS = (type(unicode()) == type(str()))
if sys.version_info[:2] < (3, 0):
def force_unicode(s, encoding='UTF-8'):
try:
s = unicode(s)
except UnicodeDecodeError:
s = str(s).decode(encoding, 'replace')
return s
else:
def force_unicode(s, encoding='UTF-8'):
return str(s)
# new.instancemethod() is obsolete for new-style classes (Python 3.x)
# We need to use descriptor methods instead.
try:
import new
def make_instancemethod(function, instance):
return new.instancemethod(function.im_func, instance,
instance.__class__)
except ImportError:
def make_instancemethod(function, instance):
return function.__get__(instance, instance.__class__)
# To be forward-compatible, we do all list sorts using keys instead of cmp
# functions. However, part of the unittest.TestLoader API involves a
# user-provideable cmp function, so we need some way to convert that.
def cmp_to_key(mycmp):
'Convert a cmp= function into a key= function'
class Key(object):
def __init__(self, obj):
self.obj = obj
def __lt__(self, other):
return mycmp(self.obj, other.obj) < 0
def __gt__(self, other):
return mycmp(self.obj, other.obj) > 0
def __eq__(self, other):
return mycmp(self.obj, other.obj) == 0
return Key
# Python 2.3 also does not support list-sorting by key, so we need to convert
# keys to cmp functions if we're running on old Python..
if sys.version_info < (2, 4):
def sort_list(l, key, reverse=False):
if reverse:
return l.sort(lambda a, b: cmp(key(b), key(a)))
else:
return l.sort(lambda a, b: cmp(key(a), key(b)))
else:
def sort_list(l, key, reverse=False):
return l.sort(key=key, reverse=reverse)
# In Python 3.x, all objects are "new style" objects descended from 'type', and
# thus types.ClassType and types.TypeType don't exist anymore. For
# compatibility, we make sure they still work.
if hasattr(types, 'ClassType'):
ClassType = types.ClassType
TypeType = types.TypeType
else:
ClassType = type
TypeType = type
# The following emulates the behavior (we need) of an 'unbound method' under
# Python 3.x (namely, the ability to have a class associated with a function
# definition so that things can do stuff based on its associated class)
class UnboundMethod:
def __init__(self, cls, func):
# Make sure we have all the same attributes as the original function,
# so that the AttributeSelector plugin will work correctly...
self.__dict__ = func.__dict__.copy()
self._func = func
self.__self__ = UnboundSelf(cls)
if sys.version_info < (3, 0):
self.im_class = cls
self.__doc__ = getattr(func, '__doc__', None)
def address(self):
cls = self.__self__.cls
modname = cls.__module__
module = sys.modules[modname]
filename = getattr(module, '__file__', None)
if filename is not None:
filename = os.path.abspath(filename)
return (nose.util.src(filename), modname, "%s.%s" % (cls.__name__,
self._func.__name__))
def __call__(self, *args, **kwargs):
return self._func(*args, **kwargs)
def __getattr__(self, attr):
return getattr(self._func, attr)
def __repr__(self):
return '<unbound method %s.%s>' % (self.__self__.cls.__name__,
self._func.__name__)
class UnboundSelf:
def __init__(self, cls):
self.cls = cls
# We have to do this hackery because Python won't let us override the
# __class__ attribute...
def __getattribute__(self, attr):
if attr == '__class__':
return self.cls
else:
return object.__getattribute__(self, attr)
def unbound_method(cls, func):
if inspect.ismethod(func):
return func
if not inspect.isfunction(func):
raise TypeError('%s is not a function' % (repr(func),))
return UnboundMethod(cls, func)
def ismethod(obj):
return inspect.ismethod(obj) or isinstance(obj, UnboundMethod)
# Make a pseudo-bytes function that can be called without the encoding arg:
if sys.version_info >= (3, 0):
def bytes_(s, encoding='utf8'):
if isinstance(s, bytes):
return s
return bytes(s, encoding)
else:
def bytes_(s, encoding=None):
return str(s)
if sys.version_info[:2] >= (2, 6):
def isgenerator(o):
if isinstance(o, UnboundMethod):
o = o._func
return inspect.isgeneratorfunction(o) or inspect.isgenerator(o)
else:
try:
from compiler.consts import CO_GENERATOR
except ImportError:
# IronPython doesn't have a complier module
CO_GENERATOR=0x20
def isgenerator(func):
try:
return func.func_code.co_flags & CO_GENERATOR != 0
except AttributeError:
return False
# Make a function to help check if an exception is derived from BaseException.
# In Python 2.4, we just use Exception instead.
if sys.version_info[:2] < (2, 5):
def is_base_exception(exc):
return isinstance(exc, Exception)
else:
def is_base_exception(exc):
return isinstance(exc, BaseException)
if sys.version_info[:2] < (3, 0):
def exc_to_unicode(ev, encoding='utf-8'):
if is_base_exception(ev):
if not hasattr(ev, '__unicode__'):
# 2.5-
if not hasattr(ev, 'message'):
# 2.4
msg = len(ev.args) and ev.args[0] or ''
else:
msg = ev.message
msg = force_unicode(msg, encoding=encoding)
clsname = force_unicode(ev.__class__.__name__,
encoding=encoding)
ev = u'%s: %s' % (clsname, msg)
elif not isinstance(ev, unicode):
ev = repr(ev)
return force_unicode(ev, encoding=encoding)
else:
def exc_to_unicode(ev, encoding='utf-8'):
return str(ev)
def format_exception(exc_info, encoding='UTF-8'):
ec, ev, tb = exc_info
# Our exception object may have been turned into a string, and Python 3's
# traceback.format_exception() doesn't take kindly to that (it expects an
# actual exception object). So we work around it, by doing the work
# ourselves if ev is not an exception object.
if not is_base_exception(ev):
tb_data = force_unicode(
''.join(traceback.format_tb(tb)),
encoding)
ev = exc_to_unicode(ev)
return tb_data + ev
else:
return force_unicode(
''.join(traceback.format_exception(*exc_info)),
encoding)

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"""
Test Result
-----------
Provides a TextTestResult that extends unittest's _TextTestResult to
provide support for error classes (such as the builtin skip and
deprecated classes), and hooks for plugins to take over or extend
reporting.
"""
import logging
try:
# 2.7+
from unittest.runner import _TextTestResult
except ImportError:
from unittest import _TextTestResult
from nose.config import Config
from nose.util import isclass, ln as _ln # backwards compat
log = logging.getLogger('nose.result')
def _exception_detail(exc):
# this is what stdlib module traceback does
try:
return str(exc)
except:
return '<unprintable %s object>' % type(exc).__name__
class TextTestResult(_TextTestResult):
"""Text test result that extends unittest's default test result
support for a configurable set of errorClasses (eg, Skip,
Deprecated, TODO) that extend the errors/failures/success triad.
"""
def __init__(self, stream, descriptions, verbosity, config=None,
errorClasses=None):
if errorClasses is None:
errorClasses = {}
self.errorClasses = errorClasses
if config is None:
config = Config()
self.config = config
_TextTestResult.__init__(self, stream, descriptions, verbosity)
def addSkip(self, test, reason):
# 2.7 skip compat
from nose.plugins.skip import SkipTest
if SkipTest in self.errorClasses:
storage, label, isfail = self.errorClasses[SkipTest]
storage.append((test, reason))
self.printLabel(label, (SkipTest, reason, None))
def addError(self, test, err):
"""Overrides normal addError to add support for
errorClasses. If the exception is a registered class, the
error will be added to the list for that class, not errors.
"""
ec, ev, tb = err
try:
exc_info = self._exc_info_to_string(err, test)
except TypeError:
# 2.3 compat
exc_info = self._exc_info_to_string(err)
for cls, (storage, label, isfail) in self.errorClasses.items():
#if 'Skip' in cls.__name__ or 'Skip' in ec.__name__:
# from nose.tools import set_trace
# set_trace()
if isclass(ec) and issubclass(ec, cls):
if isfail:
test.passed = False
storage.append((test, exc_info))
self.printLabel(label, err)
return
self.errors.append((test, exc_info))
test.passed = False
self.printLabel('ERROR')
# override to bypass changes in 2.7
def getDescription(self, test):
if self.descriptions:
return test.shortDescription() or str(test)
else:
return str(test)
def printLabel(self, label, err=None):
# Might get patched into a streamless result
stream = getattr(self, 'stream', None)
if stream is not None:
if self.showAll:
message = [label]
if err:
detail = _exception_detail(err[1])
if detail:
message.append(detail)
stream.writeln(": ".join(message))
elif self.dots:
stream.write(label[:1])
def printErrors(self):
"""Overrides to print all errorClasses errors as well.
"""
_TextTestResult.printErrors(self)
for cls in self.errorClasses.keys():
storage, label, isfail = self.errorClasses[cls]
if isfail:
self.printErrorList(label, storage)
# Might get patched into a result with no config
if hasattr(self, 'config'):
self.config.plugins.report(self.stream)
def printSummary(self, start, stop):
"""Called by the test runner to print the final summary of test
run results.
"""
write = self.stream.write
writeln = self.stream.writeln
taken = float(stop - start)
run = self.testsRun
plural = run != 1 and "s" or ""
writeln(self.separator2)
writeln("Ran %s test%s in %.3fs" % (run, plural, taken))
writeln()
summary = {}
eckeys = self.errorClasses.keys()
for cls in eckeys:
storage, label, isfail = self.errorClasses[cls]
count = len(storage)
if not count:
continue
summary[label] = count
if len(self.failures):
summary['failures'] = len(self.failures)
if len(self.errors):
summary['errors'] = len(self.errors)
if not self.wasSuccessful():
write("FAILED")
else:
write("OK")
items = summary.items()
if items:
items.sort()
write(" (")
write(", ".join(["%s=%s" % (label, count) for
label, count in items]))
writeln(")")
else:
writeln()
def wasSuccessful(self):
"""Overrides to check that there are no errors in errorClasses
lists that are marked as errors and should cause a run to
fail.
"""
if self.errors or self.failures:
return False
for cls in self.errorClasses.keys():
storage, label, isfail = self.errorClasses[cls]
if not isfail:
continue
if storage:
return False
return True
def _addError(self, test, err):
try:
exc_info = self._exc_info_to_string(err, test)
except TypeError:
# 2.3: does not take test arg
exc_info = self._exc_info_to_string(err)
self.errors.append((test, exc_info))
if self.showAll:
self.stream.write('ERROR')
elif self.dots:
self.stream.write('E')
def _exc_info_to_string(self, err, test=None):
# 2.7 skip compat
from nose.plugins.skip import SkipTest
if isclass(err[0]) and issubclass(err[0], SkipTest):
return str(err[1])
# 2.3/2.4 -- 2.4 passes test, 2.3 does not
try:
return _TextTestResult._exc_info_to_string(self, err, test)
except TypeError:
# 2.3: does not take test arg
return _TextTestResult._exc_info_to_string(self, err)
def ln(*arg, **kw):
from warnings import warn
warn("ln() has moved to nose.util from nose.result and will be removed "
"from nose.result in a future release. Please update your imports ",
DeprecationWarning)
return _ln(*arg, **kw)

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"""
Test Selection
--------------
Test selection is handled by a Selector. The test loader calls the
appropriate selector method for each object it encounters that it
thinks may be a test.
"""
import logging
import os
import unittest
from nose.config import Config
from nose.util import split_test_name, src, getfilename, getpackage, ispackage, is_executable
log = logging.getLogger(__name__)
__all__ = ['Selector', 'defaultSelector', 'TestAddress']
# for efficiency and easier mocking
op_join = os.path.join
op_basename = os.path.basename
op_exists = os.path.exists
op_splitext = os.path.splitext
op_isabs = os.path.isabs
op_abspath = os.path.abspath
class Selector(object):
"""Core test selector. Examines test candidates and determines whether,
given the specified configuration, the test candidate should be selected
as a test.
"""
def __init__(self, config):
if config is None:
config = Config()
self.configure(config)
def configure(self, config):
self.config = config
self.exclude = config.exclude
self.ignoreFiles = config.ignoreFiles
self.include = config.include
self.plugins = config.plugins
self.match = config.testMatch
def matches(self, name):
"""Does the name match my requirements?
To match, a name must match config.testMatch OR config.include
and it must not match config.exclude
"""
return ((self.match.search(name)
or (self.include and
filter(None,
[inc.search(name) for inc in self.include])))
and ((not self.exclude)
or not filter(None,
[exc.search(name) for exc in self.exclude])
))
def wantClass(self, cls):
"""Is the class a wanted test class?
A class must be a unittest.TestCase subclass, or match test name
requirements. Classes that start with _ are always excluded.
"""
declared = getattr(cls, '__test__', None)
if declared is not None:
wanted = declared
else:
wanted = (not cls.__name__.startswith('_')
and (issubclass(cls, unittest.TestCase)
or self.matches(cls.__name__)))
plug_wants = self.plugins.wantClass(cls)
if plug_wants is not None:
log.debug("Plugin setting selection of %s to %s", cls, plug_wants)
wanted = plug_wants
log.debug("wantClass %s? %s", cls, wanted)
return wanted
def wantDirectory(self, dirname):
"""Is the directory a wanted test directory?
All package directories match, so long as they do not match exclude.
All other directories must match test requirements.
"""
tail = op_basename(dirname)
if ispackage(dirname):
wanted = (not self.exclude
or not filter(None,
[exc.search(tail) for exc in self.exclude]
))
else:
wanted = (self.matches(tail)
or (self.config.srcDirs
and tail in self.config.srcDirs))
plug_wants = self.plugins.wantDirectory(dirname)
if plug_wants is not None:
log.debug("Plugin setting selection of %s to %s",
dirname, plug_wants)
wanted = plug_wants
log.debug("wantDirectory %s? %s", dirname, wanted)
return wanted
def wantFile(self, file):
"""Is the file a wanted test file?
The file must be a python source file and match testMatch or
include, and not match exclude. Files that match ignore are *never*
wanted, regardless of plugin, testMatch, include or exclude settings.
"""
# never, ever load files that match anything in ignore
# (.* _* and *setup*.py by default)
base = op_basename(file)
ignore_matches = [ ignore_this for ignore_this in self.ignoreFiles
if ignore_this.search(base) ]
if ignore_matches:
log.debug('%s matches ignoreFiles pattern; skipped',
base)
return False
if not self.config.includeExe and is_executable(file):
log.info('%s is executable; skipped', file)
return False
dummy, ext = op_splitext(base)
pysrc = ext == '.py'
wanted = pysrc and self.matches(base)
plug_wants = self.plugins.wantFile(file)
if plug_wants is not None:
log.debug("plugin setting want %s to %s", file, plug_wants)
wanted = plug_wants
log.debug("wantFile %s? %s", file, wanted)
return wanted
def wantFunction(self, function):
"""Is the function a test function?
"""
try:
if hasattr(function, 'compat_func_name'):
funcname = function.compat_func_name
else:
funcname = function.__name__
except AttributeError:
# not a function
return False
declared = getattr(function, '__test__', None)
if declared is not None:
wanted = declared
else:
wanted = not funcname.startswith('_') and self.matches(funcname)
plug_wants = self.plugins.wantFunction(function)
if plug_wants is not None:
wanted = plug_wants
log.debug("wantFunction %s? %s", function, wanted)
return wanted
def wantMethod(self, method):
"""Is the method a test method?
"""
try:
method_name = method.__name__
except AttributeError:
# not a method
return False
if method_name.startswith('_'):
# never collect 'private' methods
return False
declared = getattr(method, '__test__', None)
if declared is not None:
wanted = declared
else:
wanted = self.matches(method_name)
plug_wants = self.plugins.wantMethod(method)
if plug_wants is not None:
wanted = plug_wants
log.debug("wantMethod %s? %s", method, wanted)
return wanted
def wantModule(self, module):
"""Is the module a test module?
The tail of the module name must match test requirements. One exception:
we always want __main__.
"""
declared = getattr(module, '__test__', None)
if declared is not None:
wanted = declared
else:
wanted = self.matches(module.__name__.split('.')[-1]) \
or module.__name__ == '__main__'
plug_wants = self.plugins.wantModule(module)
if plug_wants is not None:
wanted = plug_wants
log.debug("wantModule %s? %s", module, wanted)
return wanted
defaultSelector = Selector
class TestAddress(object):
"""A test address represents a user's request to run a particular
test. The user may specify a filename or module (or neither),
and/or a callable (a class, function, or method). The naming
format for test addresses is:
filename_or_module:callable
Filenames that are not absolute will be made absolute relative to
the working dir.
The filename or module part will be considered a module name if it
doesn't look like a file, that is, if it doesn't exist on the file
system and it doesn't contain any directory separators and it
doesn't end in .py.
Callables may be a class name, function name, method name, or
class.method specification.
"""
def __init__(self, name, workingDir=None):
if workingDir is None:
workingDir = os.getcwd()
self.name = name
self.workingDir = workingDir
self.filename, self.module, self.call = split_test_name(name)
log.debug('Test name %s resolved to file %s, module %s, call %s',
name, self.filename, self.module, self.call)
if self.filename is None:
if self.module is not None:
self.filename = getfilename(self.module, self.workingDir)
if self.filename:
self.filename = src(self.filename)
if not op_isabs(self.filename):
self.filename = op_abspath(op_join(workingDir,
self.filename))
if self.module is None:
self.module = getpackage(self.filename)
log.debug(
'Final resolution of test name %s: file %s module %s call %s',
name, self.filename, self.module, self.call)
def totuple(self):
return (self.filename, self.module, self.call)
def __str__(self):
return self.name
def __repr__(self):
return "%s: (%s, %s, %s)" % (self.name, self.filename,
self.module, self.call)

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pass

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"""
Adds a sphinx directive that can be used to automatically document a plugin.
this::
.. autoplugin :: nose.plugins.foo
:plugin: Pluggy
produces::
.. automodule :: nose.plugins.foo
Options
-------
.. cmdoption :: --foo=BAR, --fooble=BAR
Do the foo thing to the new thing.
Plugin
------
.. autoclass :: nose.plugins.foo.Pluggy
:members:
Source
------
.. include :: path/to/nose/plugins/foo.py
:literal:
"""
import os
try:
from docutils import nodes, utils
from docutils.statemachine import ViewList
from docutils.parsers.rst import directives
except ImportError:
pass # won't run anyway
from nose.util import resolve_name
from nose.plugins.base import Plugin
from nose.plugins.manager import BuiltinPluginManager
from nose.config import Config
from nose.core import TestProgram
from inspect import isclass
def autoplugin_directive(dirname, arguments, options, content, lineno,
content_offset, block_text, state, state_machine):
mod_name = arguments[0]
mod = resolve_name(mod_name)
plug_name = options.get('plugin', None)
if plug_name:
obj = getattr(mod, plug_name)
else:
for entry in dir(mod):
obj = getattr(mod, entry)
if isclass(obj) and issubclass(obj, Plugin) and obj is not Plugin:
plug_name = '%s.%s' % (mod_name, entry)
break
# mod docstring
rst = ViewList()
rst.append('.. automodule :: %s\n' % mod_name, '<autodoc>')
rst.append('', '<autodoc>')
# options
rst.append('Options', '<autodoc>')
rst.append('-------', '<autodoc>')
rst.append('', '<autodoc>')
plug = obj()
opts = OptBucket()
plug.options(opts, {})
for opt in opts:
rst.append(opt.options(), '<autodoc>')
rst.append(' \n', '<autodoc>')
rst.append(' ' + opt.help + '\n', '<autodoc>')
rst.append('\n', '<autodoc>')
# plugin class
rst.append('Plugin', '<autodoc>')
rst.append('------', '<autodoc>')
rst.append('', '<autodoc>')
rst.append('.. autoclass :: %s\n' % plug_name, '<autodoc>')
rst.append(' :members:\n', '<autodoc>')
rst.append(' :show-inheritance:\n', '<autodoc>')
rst.append('', '<autodoc>')
# source
rst.append('Source', '<autodoc>')
rst.append('------', '<autodoc>')
rst.append(
'.. include :: %s\n' % utils.relative_path(
state_machine.document['source'],
os.path.abspath(mod.__file__.replace('.pyc', '.py'))),
'<autodoc>')
rst.append(' :literal:\n', '<autodoc>')
rst.append('', '<autodoc>')
node = nodes.section()
node.document = state.document
surrounding_title_styles = state.memo.title_styles
surrounding_section_level = state.memo.section_level
state.memo.title_styles = []
state.memo.section_level = 0
state.nested_parse(rst, 0, node, match_titles=1)
state.memo.title_styles = surrounding_title_styles
state.memo.section_level = surrounding_section_level
return node.children
def autohelp_directive(dirname, arguments, options, content, lineno,
content_offset, block_text, state, state_machine):
"""produces rst from nose help"""
config = Config(parserClass=OptBucket,
plugins=BuiltinPluginManager())
parser = config.getParser(TestProgram.usage())
rst = ViewList()
for line in parser.format_help().split('\n'):
rst.append(line, '<autodoc>')
rst.append('Options', '<autodoc>')
rst.append('-------', '<autodoc>')
rst.append('', '<autodoc>')
for opt in parser:
rst.append(opt.options(), '<autodoc>')
rst.append(' \n', '<autodoc>')
rst.append(' ' + opt.help + '\n', '<autodoc>')
rst.append('\n', '<autodoc>')
node = nodes.section()
node.document = state.document
surrounding_title_styles = state.memo.title_styles
surrounding_section_level = state.memo.section_level
state.memo.title_styles = []
state.memo.section_level = 0
state.nested_parse(rst, 0, node, match_titles=1)
state.memo.title_styles = surrounding_title_styles
state.memo.section_level = surrounding_section_level
return node.children
class OptBucket(object):
def __init__(self, doc=None, prog='nosetests'):
self.opts = []
self.doc = doc
self.prog = prog
def __iter__(self):
return iter(self.opts)
def format_help(self):
return self.doc.replace('%prog', self.prog).replace(':\n', '::\n')
def add_option(self, *arg, **kw):
self.opts.append(Opt(*arg, **kw))
class Opt(object):
def __init__(self, *arg, **kw):
self.opts = arg
self.action = kw.pop('action', None)
self.default = kw.pop('default', None)
self.metavar = kw.pop('metavar', None)
self.help = kw.pop('help', None)
def options(self):
buf = []
for optstring in self.opts:
desc = optstring
if self.action not in ('store_true', 'store_false'):
desc += '=%s' % self.meta(optstring)
buf.append(desc)
return '.. cmdoption :: ' + ', '.join(buf)
def meta(self, optstring):
# FIXME optparser default metavar?
return self.metavar or 'DEFAULT'
def setup(app):
app.add_directive('autoplugin',
autoplugin_directive, 1, (1, 0, 1),
plugin=directives.unchanged)
app.add_directive('autohelp', autohelp_directive, 0, (0, 0, 1))

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"""
Test Suites
-----------
Provides a LazySuite, which is a suite whose test list is a generator
function, and ContextSuite,which can run fixtures (setup/teardown
functions or methods) for the context that contains its tests.
"""
from __future__ import generators
import logging
import sys
import unittest
from nose.case import Test
from nose.config import Config
from nose.proxy import ResultProxyFactory
from nose.util import isclass, resolve_name, try_run
if sys.platform == 'cli':
if sys.version_info[:2] < (2, 6):
import clr
clr.AddReference("IronPython")
from IronPython.Runtime.Exceptions import StringException
else:
class StringException(Exception):
pass
log = logging.getLogger(__name__)
#log.setLevel(logging.DEBUG)
# Singleton for default value -- see ContextSuite.__init__ below
_def = object()
def _strclass(cls):
return "%s.%s" % (cls.__module__, cls.__name__)
class MixedContextError(Exception):
"""Error raised when a context suite sees tests from more than
one context.
"""
pass
class LazySuite(unittest.TestSuite):
"""A suite that may use a generator as its list of tests
"""
def __init__(self, tests=()):
"""Initialize the suite. tests may be an iterable or a generator
"""
super(LazySuite, self).__init__()
self._set_tests(tests)
def __iter__(self):
return iter(self._tests)
def __repr__(self):
return "<%s tests=generator (%s)>" % (
_strclass(self.__class__), id(self))
def __hash__(self):
return object.__hash__(self)
__str__ = __repr__
def addTest(self, test):
self._precache.append(test)
# added to bypass run changes in 2.7's unittest
def run(self, result):
for test in self._tests:
if result.shouldStop:
break
test(result)
return result
def __nonzero__(self):
log.debug("tests in %s?", id(self))
if self._precache:
return True
if self.test_generator is None:
return False
try:
test = self.test_generator.next()
if test is not None:
self._precache.append(test)
return True
except StopIteration:
pass
return False
def _get_tests(self):
log.debug("precache is %s", self._precache)
for test in self._precache:
yield test
if self.test_generator is None:
return
for test in self.test_generator:
yield test
def _set_tests(self, tests):
self._precache = []
is_suite = isinstance(tests, unittest.TestSuite)
if callable(tests) and not is_suite:
self.test_generator = tests()
elif is_suite:
# Suites need special treatment: they must be called like
# tests for their setup/teardown to run (if any)
self.addTests([tests])
self.test_generator = None
else:
self.addTests(tests)
self.test_generator = None
_tests = property(_get_tests, _set_tests, None,
"Access the tests in this suite. Access is through a "
"generator, so iteration may not be repeatable.")
class ContextSuite(LazySuite):
"""A suite with context.
A ContextSuite executes fixtures (setup and teardown functions or
methods) for the context containing its tests.
The context may be explicitly passed. If it is not, a context (or
nested set of contexts) will be constructed by examining the tests
in the suite.
"""
failureException = unittest.TestCase.failureException
was_setup = False
was_torndown = False
classSetup = ('setup_class', 'setup_all', 'setupClass', 'setupAll',
'setUpClass', 'setUpAll')
classTeardown = ('teardown_class', 'teardown_all', 'teardownClass',
'teardownAll', 'tearDownClass', 'tearDownAll')
moduleSetup = ('setup_module', 'setupModule', 'setUpModule', 'setup',
'setUp')
moduleTeardown = ('teardown_module', 'teardownModule', 'tearDownModule',
'teardown', 'tearDown')
packageSetup = ('setup_package', 'setupPackage', 'setUpPackage')
packageTeardown = ('teardown_package', 'teardownPackage',
'tearDownPackage')
def __init__(self, tests=(), context=None, factory=None,
config=None, resultProxy=None, can_split=True):
log.debug("Context suite for %s (%s) (%s)", tests, context, id(self))
self.context = context
self.factory = factory
if config is None:
config = Config()
self.config = config
self.resultProxy = resultProxy
self.has_run = False
self.can_split = can_split
self.error_context = None
super(ContextSuite, self).__init__(tests)
def __repr__(self):
return "<%s context=%s>" % (
_strclass(self.__class__),
getattr(self.context, '__name__', self.context))
__str__ = __repr__
def id(self):
if self.error_context:
return '%s:%s' % (repr(self), self.error_context)
else:
return repr(self)
def __hash__(self):
return object.__hash__(self)
# 2.3 compat -- force 2.4 call sequence
def __call__(self, *arg, **kw):
return self.run(*arg, **kw)
def exc_info(self):
"""Hook for replacing error tuple output
"""
return sys.exc_info()
def _exc_info(self):
"""Bottleneck to fix up IronPython string exceptions
"""
e = self.exc_info()
if sys.platform == 'cli':
if isinstance(e[0], StringException):
# IronPython throws these StringExceptions, but
# traceback checks type(etype) == str. Make a real
# string here.
e = (str(e[0]), e[1], e[2])
return e
def run(self, result):
"""Run tests in suite inside of suite fixtures.
"""
# proxy the result for myself
log.debug("suite %s (%s) run called, tests: %s", id(self), self, self._tests)
#import pdb
#pdb.set_trace()
if self.resultProxy:
result, orig = self.resultProxy(result, self), result
else:
result, orig = result, result
try:
self.setUp()
except KeyboardInterrupt:
raise
except:
self.error_context = 'setup'
result.addError(self, self._exc_info())
return
try:
for test in self._tests:
if result.shouldStop:
log.debug("stopping")
break
# each nose.case.Test will create its own result proxy
# so the cases need the original result, to avoid proxy
# chains
test(orig)
finally:
self.has_run = True
try:
self.tearDown()
except KeyboardInterrupt:
raise
except:
self.error_context = 'teardown'
result.addError(self, self._exc_info())
def hasFixtures(self, ctx_callback=None):
context = self.context
if context is None:
return False
if self.implementsAnyFixture(context, ctx_callback=ctx_callback):
return True
# My context doesn't have any, but its ancestors might
factory = self.factory
if factory:
ancestors = factory.context.get(self, [])
for ancestor in ancestors:
if self.implementsAnyFixture(
ancestor, ctx_callback=ctx_callback):
return True
return False
def implementsAnyFixture(self, context, ctx_callback):
if isclass(context):
names = self.classSetup + self.classTeardown
else:
names = self.moduleSetup + self.moduleTeardown
if hasattr(context, '__path__'):
names += self.packageSetup + self.packageTeardown
# If my context has any fixture attribute, I have fixtures
fixt = False
for m in names:
if hasattr(context, m):
fixt = True
break
if ctx_callback is None:
return fixt
return ctx_callback(context, fixt)
def setUp(self):
log.debug("suite %s setUp called, tests: %s", id(self), self._tests)
if not self:
# I have no tests
log.debug("suite %s has no tests", id(self))
return
if self.was_setup:
log.debug("suite %s already set up", id(self))
return
context = self.context
if context is None:
return
# before running my own context's setup, I need to
# ask the factory if my context's contexts' setups have been run
factory = self.factory
if factory:
# get a copy, since we'll be destroying it as we go
ancestors = factory.context.get(self, [])[:]
while ancestors:
ancestor = ancestors.pop()
log.debug("ancestor %s may need setup", ancestor)
if ancestor in factory.was_setup:
continue
log.debug("ancestor %s does need setup", ancestor)
self.setupContext(ancestor)
if not context in factory.was_setup:
self.setupContext(context)
else:
self.setupContext(context)
self.was_setup = True
log.debug("completed suite setup")
def setupContext(self, context):
self.config.plugins.startContext(context)
log.debug("%s setup context %s", self, context)
if self.factory:
if context in self.factory.was_setup:
return
# note that I ran the setup for this context, so that I'll run
# the teardown in my teardown
self.factory.was_setup[context] = self
if isclass(context):
names = self.classSetup
else:
names = self.moduleSetup
if hasattr(context, '__path__'):
names = self.packageSetup + names
try_run(context, names)
def shortDescription(self):
if self.context is None:
return "test suite"
return "test suite for %s" % self.context
def tearDown(self):
log.debug('context teardown')
if not self.was_setup or self.was_torndown:
log.debug(
"No reason to teardown (was_setup? %s was_torndown? %s)"
% (self.was_setup, self.was_torndown))
return
self.was_torndown = True
context = self.context
if context is None:
log.debug("No context to tear down")
return
# for each ancestor... if the ancestor was setup
# and I did the setup, I can do teardown
factory = self.factory
if factory:
ancestors = factory.context.get(self, []) + [context]
for ancestor in ancestors:
log.debug('ancestor %s may need teardown', ancestor)
if not ancestor in factory.was_setup:
log.debug('ancestor %s was not setup', ancestor)
continue
if ancestor in factory.was_torndown:
log.debug('ancestor %s already torn down', ancestor)
continue
setup = factory.was_setup[ancestor]
log.debug("%s setup ancestor %s", setup, ancestor)
if setup is self:
self.teardownContext(ancestor)
else:
self.teardownContext(context)
def teardownContext(self, context):
log.debug("%s teardown context %s", self, context)
if self.factory:
if context in self.factory.was_torndown:
return
self.factory.was_torndown[context] = self
if isclass(context):
names = self.classTeardown
else:
names = self.moduleTeardown
if hasattr(context, '__path__'):
names = self.packageTeardown + names
try_run(context, names)
self.config.plugins.stopContext(context)
# FIXME the wrapping has to move to the factory?
def _get_wrapped_tests(self):
for test in self._get_tests():
if isinstance(test, Test) or isinstance(test, unittest.TestSuite):
yield test
else:
yield Test(test,
config=self.config,
resultProxy=self.resultProxy)
_tests = property(_get_wrapped_tests, LazySuite._set_tests, None,
"Access the tests in this suite. Tests are returned "
"inside of a context wrapper.")
class ContextSuiteFactory(object):
"""Factory for ContextSuites. Called with a collection of tests,
the factory decides on a hierarchy of contexts by introspecting
the collection or the tests themselves to find the objects
containing the test objects. It always returns one suite, but that
suite may consist of a hierarchy of nested suites.
"""
suiteClass = ContextSuite
def __init__(self, config=None, suiteClass=None, resultProxy=_def):
if config is None:
config = Config()
self.config = config
if suiteClass is not None:
self.suiteClass = suiteClass
# Using a singleton to represent default instead of None allows
# passing resultProxy=None to turn proxying off.
if resultProxy is _def:
resultProxy = ResultProxyFactory(config=config)
self.resultProxy = resultProxy
self.suites = {}
self.context = {}
self.was_setup = {}
self.was_torndown = {}
def __call__(self, tests, **kw):
"""Return ``ContextSuite`` for tests. ``tests`` may either
be a callable (in which case the resulting ContextSuite will
have no parent context and be evaluated lazily) or an
iterable. In that case the tests will wrapped in
nose.case.Test, be examined and the context of each found and a
suite of suites returned, organized into a stack with the
outermost suites belonging to the outermost contexts.
"""
log.debug("Create suite for %s", tests)
context = kw.pop('context', getattr(tests, 'context', None))
log.debug("tests %s context %s", tests, context)
if context is None:
tests = self.wrapTests(tests)
try:
context = self.findContext(tests)
except MixedContextError:
return self.makeSuite(self.mixedSuites(tests), None, **kw)
return self.makeSuite(tests, context, **kw)
def ancestry(self, context):
"""Return the ancestry of the context (that is, all of the
packages and modules containing the context), in order of
descent with the outermost ancestor last.
This method is a generator.
"""
log.debug("get ancestry %s", context)
if context is None:
return
# Methods include reference to module they are defined in, we
# don't want that, instead want the module the class is in now
# (classes are re-ancestored elsewhere).
if hasattr(context, 'im_class'):
context = context.im_class
elif hasattr(context, '__self__'):
context = context.__self__.__class__
if hasattr(context, '__module__'):
ancestors = context.__module__.split('.')
elif hasattr(context, '__name__'):
ancestors = context.__name__.split('.')[:-1]
else:
raise TypeError("%s has no ancestors?" % context)
while ancestors:
log.debug(" %s ancestors %s", context, ancestors)
yield resolve_name('.'.join(ancestors))
ancestors.pop()
def findContext(self, tests):
if callable(tests) or isinstance(tests, unittest.TestSuite):
return None
context = None
for test in tests:
# Don't look at suites for contexts, only tests
ctx = getattr(test, 'context', None)
if ctx is None:
continue
if context is None:
context = ctx
elif context != ctx:
raise MixedContextError(
"Tests with different contexts in same suite! %s != %s"
% (context, ctx))
return context
def makeSuite(self, tests, context, **kw):
suite = self.suiteClass(
tests, context=context, config=self.config, factory=self,
resultProxy=self.resultProxy, **kw)
if context is not None:
self.suites.setdefault(context, []).append(suite)
self.context.setdefault(suite, []).append(context)
log.debug("suite %s has context %s", suite,
getattr(context, '__name__', None))
for ancestor in self.ancestry(context):
self.suites.setdefault(ancestor, []).append(suite)
self.context[suite].append(ancestor)
log.debug("suite %s has ancestor %s", suite, ancestor.__name__)
return suite
def mixedSuites(self, tests):
"""The complex case where there are tests that don't all share
the same context. Groups tests into suites with common ancestors,
according to the following (essentially tail-recursive) procedure:
Starting with the context of the first test, if it is not
None, look for tests in the remaining tests that share that
ancestor. If any are found, group into a suite with that
ancestor as the context, and replace the current suite with
that suite. Continue this process for each ancestor of the
first test, until all ancestors have been processed. At this
point if any tests remain, recurse with those tests as the
input, returning a list of the common suite (which may be the
suite or test we started with, if no common tests were found)
plus the results of recursion.
"""
if not tests:
return []
head = tests.pop(0)
if not tests:
return [head] # short circuit when none are left to combine
suite = head # the common ancestry suite, so far
tail = tests[:]
context = getattr(head, 'context', None)
if context is not None:
ancestors = [context] + [a for a in self.ancestry(context)]
for ancestor in ancestors:
common = [suite] # tests with ancestor in common, so far
remain = [] # tests that remain to be processed
for test in tail:
found_common = False
test_ctx = getattr(test, 'context', None)
if test_ctx is None:
remain.append(test)
continue
if test_ctx is ancestor:
common.append(test)
continue
for test_ancestor in self.ancestry(test_ctx):
if test_ancestor is ancestor:
common.append(test)
found_common = True
break
if not found_common:
remain.append(test)
if common:
suite = self.makeSuite(common, ancestor)
tail = self.mixedSuites(remain)
return [suite] + tail
def wrapTests(self, tests):
log.debug("wrap %s", tests)
if callable(tests) or isinstance(tests, unittest.TestSuite):
log.debug("I won't wrap")
return tests
wrapped = []
for test in tests:
log.debug("wrapping %s", test)
if isinstance(test, Test) or isinstance(test, unittest.TestSuite):
wrapped.append(test)
elif isinstance(test, ContextList):
wrapped.append(self.makeSuite(test, context=test.context))
else:
wrapped.append(
Test(test, config=self.config, resultProxy=self.resultProxy)
)
return wrapped
class ContextList(object):
"""Not quite a suite -- a group of tests in a context. This is used
to hint the ContextSuiteFactory about what context the tests
belong to, in cases where it may be ambiguous or missing.
"""
def __init__(self, tests, context=None):
self.tests = tests
self.context = context
def __iter__(self):
return iter(self.tests)
class FinalizingSuiteWrapper(unittest.TestSuite):
"""Wraps suite and calls final function after suite has
executed. Used to call final functions in cases (like running in
the standard test runner) where test running is not under nose's
control.
"""
def __init__(self, suite, finalize):
super(FinalizingSuiteWrapper, self).__init__()
self.suite = suite
self.finalize = finalize
def __call__(self, *arg, **kw):
return self.run(*arg, **kw)
# 2.7 compat
def __iter__(self):
return iter(self.suite)
def run(self, *arg, **kw):
try:
return self.suite(*arg, **kw)
finally:
self.finalize(*arg, **kw)
# backwards compat -- sort of
class TestDir:
def __init__(*arg, **kw):
raise NotImplementedError(
"TestDir is not usable with nose 0.10. The class is present "
"in nose.suite for backwards compatibility purposes but it "
"may not be used.")
class TestModule:
def __init__(*arg, **kw):
raise NotImplementedError(
"TestModule is not usable with nose 0.10. The class is present "
"in nose.suite for backwards compatibility purposes but it "
"may not be used.")

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"""
Tools for testing
-----------------
nose.tools provides a few convenience functions to make writing tests
easier. You don't have to use them; nothing in the rest of nose depends
on any of these methods.
"""
from nose.tools.nontrivial import *
from nose.tools.nontrivial import __all__ as nontrivial_all
from nose.tools.trivial import *
from nose.tools.trivial import __all__ as trivial_all
__all__ = trivial_all + nontrivial_all

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"""Tools not exempt from being descended into in tracebacks"""
import time
__all__ = ['make_decorator', 'raises', 'set_trace', 'timed', 'with_setup',
'TimeExpired', 'istest', 'nottest']
class TimeExpired(AssertionError):
pass
def make_decorator(func):
"""
Wraps a test decorator so as to properly replicate metadata
of the decorated function, including nose's additional stuff
(namely, setup and teardown).
"""
def decorate(newfunc):
if hasattr(func, 'compat_func_name'):
name = func.compat_func_name
else:
name = func.__name__
newfunc.__dict__ = func.__dict__
newfunc.__doc__ = func.__doc__
newfunc.__module__ = func.__module__
if not hasattr(newfunc, 'compat_co_firstlineno'):
newfunc.compat_co_firstlineno = func.func_code.co_firstlineno
try:
newfunc.__name__ = name
except TypeError:
# can't set func name in 2.3
newfunc.compat_func_name = name
return newfunc
return decorate
def raises(*exceptions):
"""Test must raise one of expected exceptions to pass.
Example use::
@raises(TypeError, ValueError)
def test_raises_type_error():
raise TypeError("This test passes")
@raises(Exception)
def test_that_fails_by_passing():
pass
If you want to test many assertions about exceptions in a single test,
you may want to use `assert_raises` instead.
"""
valid = ' or '.join([e.__name__ for e in exceptions])
def decorate(func):
name = func.__name__
def newfunc(*arg, **kw):
try:
func(*arg, **kw)
except exceptions:
pass
except:
raise
else:
message = "%s() did not raise %s" % (name, valid)
raise AssertionError(message)
newfunc = make_decorator(func)(newfunc)
return newfunc
return decorate
def set_trace():
"""Call pdb.set_trace in the calling frame, first restoring
sys.stdout to the real output stream. Note that sys.stdout is NOT
reset to whatever it was before the call once pdb is done!
"""
import pdb
import sys
stdout = sys.stdout
sys.stdout = sys.__stdout__
pdb.Pdb().set_trace(sys._getframe().f_back)
def timed(limit):
"""Test must finish within specified time limit to pass.
Example use::
@timed(.1)
def test_that_fails():
time.sleep(.2)
"""
def decorate(func):
def newfunc(*arg, **kw):
start = time.time()
result = func(*arg, **kw)
end = time.time()
if end - start > limit:
raise TimeExpired("Time limit (%s) exceeded" % limit)
return result
newfunc = make_decorator(func)(newfunc)
return newfunc
return decorate
def with_setup(setup=None, teardown=None):
"""Decorator to add setup and/or teardown methods to a test function::
@with_setup(setup, teardown)
def test_something():
" ... "
Note that `with_setup` is useful *only* for test functions, not for test
methods or inside of TestCase subclasses.
"""
def decorate(func, setup=setup, teardown=teardown):
if setup:
if hasattr(func, 'setup'):
_old_s = func.setup
def _s():
setup()
_old_s()
func.setup = _s
else:
func.setup = setup
if teardown:
if hasattr(func, 'teardown'):
_old_t = func.teardown
def _t():
_old_t()
teardown()
func.teardown = _t
else:
func.teardown = teardown
return func
return decorate
def istest(func):
"""Decorator to mark a function or method as a test
"""
func.__test__ = True
return func
def nottest(func):
"""Decorator to mark a function or method as *not* a test
"""
func.__test__ = False
return func

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"""Tools so trivial that tracebacks should not descend into them
We define the ``__unittest`` symbol in their module namespace so unittest will
skip them when printing tracebacks, just as it does for their corresponding
methods in ``unittest`` proper.
"""
import re
import unittest
__all__ = ['ok_', 'eq_']
# Use the same flag as unittest itself to prevent descent into these functions:
__unittest = 1
def ok_(expr, msg=None):
"""Shorthand for assert. Saves 3 whole characters!
"""
if not expr:
raise AssertionError(msg)
def eq_(a, b, msg=None):
"""Shorthand for 'assert a == b, "%r != %r" % (a, b)
"""
if not a == b:
raise AssertionError(msg or "%r != %r" % (a, b))
#
# Expose assert* from unittest.TestCase
# - give them pep8 style names
#
caps = re.compile('([A-Z])')
def pep8(name):
return caps.sub(lambda m: '_' + m.groups()[0].lower(), name)
class Dummy(unittest.TestCase):
def nop():
pass
_t = Dummy('nop')
for at in [ at for at in dir(_t)
if at.startswith('assert') and not '_' in at ]:
pepd = pep8(at)
vars()[pepd] = getattr(_t, at)
__all__.append(pepd)
del Dummy
del _t
del pep8

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"""
Twisted integration
-------------------
This module provides a very simple way to integrate your tests with the
Twisted_ event loop.
You must import this module *before* importing anything from Twisted itself!
Example::
from nose.twistedtools import reactor, deferred
@deferred()
def test_resolve():
return reactor.resolve("www.python.org")
Or, more realistically::
@deferred(timeout=5.0)
def test_resolve():
d = reactor.resolve("www.python.org")
def check_ip(ip):
assert ip == "67.15.36.43"
d.addCallback(check_ip)
return d
.. _Twisted: http://twistedmatrix.com/trac/
"""
import sys
from Queue import Queue, Empty
from nose.tools import make_decorator, TimeExpired
__all__ = [
'threaded_reactor', 'reactor', 'deferred', 'TimeExpired',
'stop_reactor'
]
_twisted_thread = None
def threaded_reactor():
"""
Start the Twisted reactor in a separate thread, if not already done.
Returns the reactor.
The thread will automatically be destroyed when all the tests are done.
"""
global _twisted_thread
try:
from twisted.internet import reactor
except ImportError:
return None, None
if not _twisted_thread:
from twisted.python import threadable
from threading import Thread
_twisted_thread = Thread(target=lambda: reactor.run( \
installSignalHandlers=False))
_twisted_thread.setDaemon(True)
_twisted_thread.start()
return reactor, _twisted_thread
# Export global reactor variable, as Twisted does
reactor, reactor_thread = threaded_reactor()
def stop_reactor():
"""Stop the reactor and join the reactor thread until it stops.
Call this function in teardown at the module or package level to
reset the twisted system after your tests. You *must* do this if
you mix tests using these tools and tests using twisted.trial.
"""
global _twisted_thread
def stop_reactor():
'''Helper for calling stop from withing the thread.'''
reactor.stop()
reactor.callFromThread(stop_reactor)
reactor_thread.join()
for p in reactor.getDelayedCalls():
if p.active():
p.cancel()
_twisted_thread = None
def deferred(timeout=None):
"""
By wrapping a test function with this decorator, you can return a
twisted Deferred and the test will wait for the deferred to be triggered.
The whole test function will run inside the Twisted event loop.
The optional timeout parameter specifies the maximum duration of the test.
The difference with timed() is that timed() will still wait for the test
to end, while deferred() will stop the test when its timeout has expired.
The latter is more desireable when dealing with network tests, because
the result may actually never arrive.
If the callback is triggered, the test has passed.
If the errback is triggered or the timeout expires, the test has failed.
Example::
@deferred(timeout=5.0)
def test_resolve():
return reactor.resolve("www.python.org")
Attention! If you combine this decorator with other decorators (like
"raises"), deferred() must be called *first*!
In other words, this is good::
@raises(DNSLookupError)
@deferred()
def test_error():
return reactor.resolve("xxxjhjhj.biz")
and this is bad::
@deferred()
@raises(DNSLookupError)
def test_error():
return reactor.resolve("xxxjhjhj.biz")
"""
reactor, reactor_thread = threaded_reactor()
if reactor is None:
raise ImportError("twisted is not available or could not be imported")
# Check for common syntax mistake
# (otherwise, tests can be silently ignored
# if one writes "@deferred" instead of "@deferred()")
try:
timeout is None or timeout + 0
except TypeError:
raise TypeError("'timeout' argument must be a number or None")
def decorate(func):
def wrapper(*args, **kargs):
q = Queue()
def callback(value):
q.put(None)
def errback(failure):
# Retrieve and save full exception info
try:
failure.raiseException()
except:
q.put(sys.exc_info())
def g():
try:
d = func(*args, **kargs)
try:
d.addCallbacks(callback, errback)
# Check for a common mistake and display a nice error
# message
except AttributeError:
raise TypeError("you must return a twisted Deferred "
"from your test case!")
# Catch exceptions raised in the test body (from the
# Twisted thread)
except:
q.put(sys.exc_info())
reactor.callFromThread(g)
try:
error = q.get(timeout=timeout)
except Empty:
raise TimeExpired("timeout expired before end of test (%f s.)"
% timeout)
# Re-raise all exceptions
if error is not None:
exc_type, exc_value, tb = error
raise exc_type, exc_value, tb
wrapper = make_decorator(func)(wrapper)
return wrapper
return decorate

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nose collects tests automatically from python source files,
directories and packages found in its working directory (which
defaults to the current working directory). Any python source file,
directory or package that matches the testMatch regular expression
(by default: `(?:^|[\b_\.-])[Tt]est)` will be collected as a test (or
source for collection of tests). In addition, all other packages
found in the working directory will be examined for python source files
or directories that match testMatch. Package discovery descends all
the way down the tree, so package.tests and package.sub.tests and
package.sub.sub2.tests will all be collected.
Within a test directory or package, any python source file matching
testMatch will be examined for test cases. Within a test module,
functions and classes whose names match testMatch and TestCase
subclasses with any name will be loaded and executed as tests. Tests
may use the assert keyword or raise AssertionErrors to indicate test
failure. TestCase subclasses may do the same or use the various
TestCase methods available.
**It is important to note that the default behavior of nose is to
not include tests from files which are executable.** To include
tests from such files, remove their executable bit or use
the --exe flag (see 'Options' section below).
Selecting Tests
---------------
To specify which tests to run, pass test names on the command line:
%prog only_test_this.py
Test names specified may be file or module names, and may optionally
indicate the test case to run by separating the module or file name
from the test case name with a colon. Filenames may be relative or
absolute. Examples:
%prog test.module
%prog another.test:TestCase.test_method
%prog a.test:TestCase
%prog /path/to/test/file.py:test_function
You may also change the working directory where nose looks for tests
by using the -w switch:
%prog -w /path/to/tests
Note, however, that support for multiple -w arguments is now deprecated
and will be removed in a future release. As of nose 0.10, you can get
the same behavior by specifying the target directories *without*
the -w switch:
%prog /path/to/tests /another/path/to/tests
Further customization of test selection and loading is possible
through the use of plugins.
Test result output is identical to that of unittest, except for
the additional features (error classes, and plugin-supplied
features such as output capture and assert introspection) detailed
in the options below.
Configuration
-------------
In addition to passing command-line options, you may also put
configuration options in your project's *setup.cfg* file, or a .noserc
or nose.cfg file in your home directory. In any of these standard
ini-style config files, you put your nosetests configuration in a
``[nosetests]`` section. Options are the same as on the command line,
with the -- prefix removed. For options that are simple switches, you
must supply a value:
[nosetests]
verbosity=3
with-doctest=1
All configuration files that are found will be loaded and their
options combined. You can override the standard config file loading
with the ``-c`` option.
Using Plugins
-------------
There are numerous nose plugins available via easy_install and
elsewhere. To use a plugin, just install it. The plugin will add
command line options to nosetests. To verify that the plugin is installed,
run:
nosetests --plugins
You can add -v or -vv to that command to show more information
about each plugin.
If you are running nose.main() or nose.run() from a script, you
can specify a list of plugins to use by passing a list of plugins
with the plugins keyword argument.
0.9 plugins
-----------
nose 1.0 can use SOME plugins that were written for nose 0.9. The
default plugin manager inserts a compatibility wrapper around 0.9
plugins that adapts the changed plugin api calls. However, plugins
that access nose internals are likely to fail, especially if they
attempt to access test case or test suite classes. For example,
plugins that try to determine if a test passed to startTest is an
individual test or a suite will fail, partly because suites are no
longer passed to startTest and partly because it's likely that the
plugin is trying to find out if the test is an instance of a class
that no longer exists.
0.10 and 0.11 plugins
---------------------
All plugins written for nose 0.10 and 0.11 should work with nose 1.0.

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"""Utility functions and classes used by nose internally.
"""
import inspect
import itertools
import logging
import stat
import os
import re
import sys
import types
import unittest
from nose.pyversion import ClassType, TypeType, isgenerator, ismethod
log = logging.getLogger('nose')
ident_re = re.compile(r'^[A-Za-z_][A-Za-z0-9_.]*$')
class_types = (ClassType, TypeType)
skip_pattern = r"(?:\.svn)|(?:[^.]+\.py[co])|(?:.*~)|(?:.*\$py\.class)|(?:__pycache__)"
try:
set()
set = set # make from nose.util import set happy
except NameError:
try:
from sets import Set as set
except ImportError:
pass
def ls_tree(dir_path="",
skip_pattern=skip_pattern,
indent="|-- ", branch_indent="| ",
last_indent="`-- ", last_branch_indent=" "):
# TODO: empty directories look like non-directory files
return "\n".join(_ls_tree_lines(dir_path, skip_pattern,
indent, branch_indent,
last_indent, last_branch_indent))
def _ls_tree_lines(dir_path, skip_pattern,
indent, branch_indent, last_indent, last_branch_indent):
if dir_path == "":
dir_path = os.getcwd()
lines = []
names = os.listdir(dir_path)
names.sort()
dirs, nondirs = [], []
for name in names:
if re.match(skip_pattern, name):
continue
if os.path.isdir(os.path.join(dir_path, name)):
dirs.append(name)
else:
nondirs.append(name)
# list non-directories first
entries = list(itertools.chain([(name, False) for name in nondirs],
[(name, True) for name in dirs]))
def ls_entry(name, is_dir, ind, branch_ind):
if not is_dir:
yield ind + name
else:
path = os.path.join(dir_path, name)
if not os.path.islink(path):
yield ind + name
subtree = _ls_tree_lines(path, skip_pattern,
indent, branch_indent,
last_indent, last_branch_indent)
for x in subtree:
yield branch_ind + x
for name, is_dir in entries[:-1]:
for line in ls_entry(name, is_dir, indent, branch_indent):
yield line
if entries:
name, is_dir = entries[-1]
for line in ls_entry(name, is_dir, last_indent, last_branch_indent):
yield line
def absdir(path):
"""Return absolute, normalized path to directory, if it exists; None
otherwise.
"""
if not os.path.isabs(path):
path = os.path.normpath(os.path.abspath(os.path.join(os.getcwd(),
path)))
if path is None or not os.path.isdir(path):
return None
return path
def absfile(path, where=None):
"""Return absolute, normalized path to file (optionally in directory
where), or None if the file can't be found either in where or the current
working directory.
"""
orig = path
if where is None:
where = os.getcwd()
if isinstance(where, list) or isinstance(where, tuple):
for maybe_path in where:
maybe_abs = absfile(path, maybe_path)
if maybe_abs is not None:
return maybe_abs
return None
if not os.path.isabs(path):
path = os.path.normpath(os.path.abspath(os.path.join(where, path)))
if path is None or not os.path.exists(path):
if where != os.getcwd():
# try the cwd instead
path = os.path.normpath(os.path.abspath(os.path.join(os.getcwd(),
orig)))
if path is None or not os.path.exists(path):
return None
if os.path.isdir(path):
# might want an __init__.py from pacakge
init = os.path.join(path,'__init__.py')
if os.path.isfile(init):
return init
elif os.path.isfile(path):
return path
return None
def anyp(predicate, iterable):
for item in iterable:
if predicate(item):
return True
return False
def file_like(name):
"""A name is file-like if it is a path that exists, or it has a
directory part, or it ends in .py, or it isn't a legal python
identifier.
"""
return (os.path.exists(name)
or os.path.dirname(name)
or name.endswith('.py')
or not ident_re.match(os.path.splitext(name)[0]))
def func_lineno(func):
"""Get the line number of a function. First looks for
compat_co_firstlineno, then func_code.co_first_lineno.
"""
try:
return func.compat_co_firstlineno
except AttributeError:
try:
return func.func_code.co_firstlineno
except AttributeError:
return -1
def isclass(obj):
"""Is obj a class? Inspect's isclass is too liberal and returns True
for objects that can't be subclasses of anything.
"""
obj_type = type(obj)
return obj_type in class_types or issubclass(obj_type, type)
# backwards compat (issue #64)
is_generator = isgenerator
def ispackage(path):
"""
Is this path a package directory?
>>> ispackage('nose')
True
>>> ispackage('unit_tests')
False
>>> ispackage('nose/plugins')
True
>>> ispackage('nose/loader.py')
False
"""
if os.path.isdir(path):
# at least the end of the path must be a legal python identifier
# and __init__.py[co] must exist
end = os.path.basename(path)
if ident_re.match(end):
for init in ('__init__.py', '__init__.pyc', '__init__.pyo'):
if os.path.isfile(os.path.join(path, init)):
return True
if sys.platform.startswith('java') and \
os.path.isfile(os.path.join(path, '__init__$py.class')):
return True
return False
def isproperty(obj):
"""
Is this a property?
>>> class Foo:
... def got(self):
... return 2
... def get(self):
... return 1
... get = property(get)
>>> isproperty(Foo.got)
False
>>> isproperty(Foo.get)
True
"""
return type(obj) == property
def getfilename(package, relativeTo=None):
"""Find the python source file for a package, relative to a
particular directory (defaults to current working directory if not
given).
"""
if relativeTo is None:
relativeTo = os.getcwd()
path = os.path.join(relativeTo, os.sep.join(package.split('.')))
if os.path.exists(path + '/__init__.py'):
return path
filename = path + '.py'
if os.path.exists(filename):
return filename
return None
def getpackage(filename):
"""
Find the full dotted package name for a given python source file
name. Returns None if the file is not a python source file.
>>> getpackage('foo.py')
'foo'
>>> getpackage('biff/baf.py')
'baf'
>>> getpackage('nose/util.py')
'nose.util'
Works for directories too.
>>> getpackage('nose')
'nose'
>>> getpackage('nose/plugins')
'nose.plugins'
And __init__ files stuck onto directories
>>> getpackage('nose/plugins/__init__.py')
'nose.plugins'
Absolute paths also work.
>>> path = os.path.abspath(os.path.join('nose', 'plugins'))
>>> getpackage(path)
'nose.plugins'
"""
src_file = src(filename)
if (os.path.isdir(src_file) or not src_file.endswith('.py')) and not ispackage(src_file):
return None
base, ext = os.path.splitext(os.path.basename(src_file))
if base == '__init__':
mod_parts = []
else:
mod_parts = [base]
path, part = os.path.split(os.path.split(src_file)[0])
while part:
if ispackage(os.path.join(path, part)):
mod_parts.append(part)
else:
break
path, part = os.path.split(path)
mod_parts.reverse()
return '.'.join(mod_parts)
def ln(label):
"""Draw a 70-char-wide divider, with label in the middle.
>>> ln('hello there')
'---------------------------- hello there -----------------------------'
"""
label_len = len(label) + 2
chunk = (70 - label_len) // 2
out = '%s %s %s' % ('-' * chunk, label, '-' * chunk)
pad = 70 - len(out)
if pad > 0:
out = out + ('-' * pad)
return out
def resolve_name(name, module=None):
"""Resolve a dotted name to a module and its parts. This is stolen
wholesale from unittest.TestLoader.loadTestByName.
>>> resolve_name('nose.util') #doctest: +ELLIPSIS
<module 'nose.util' from...>
>>> resolve_name('nose.util.resolve_name') #doctest: +ELLIPSIS
<function resolve_name at...>
"""
parts = name.split('.')
parts_copy = parts[:]
if module is None:
while parts_copy:
try:
log.debug("__import__ %s", name)
module = __import__('.'.join(parts_copy))
break
except ImportError:
del parts_copy[-1]
if not parts_copy:
raise
parts = parts[1:]
obj = module
log.debug("resolve: %s, %s, %s, %s", parts, name, obj, module)
for part in parts:
obj = getattr(obj, part)
return obj
def split_test_name(test):
"""Split a test name into a 3-tuple containing file, module, and callable
names, any of which (but not all) may be blank.
Test names are in the form:
file_or_module:callable
Either side of the : may be dotted. To change the splitting behavior, you
can alter nose.util.split_test_re.
"""
norm = os.path.normpath
file_or_mod = test
fn = None
if not ':' in test:
# only a file or mod part
if file_like(test):
return (norm(test), None, None)
else:
return (None, test, None)
# could be path|mod:callable, or a : in the file path someplace
head, tail = os.path.split(test)
if not head:
# this is a case like 'foo:bar' -- generally a module
# name followed by a callable, but also may be a windows
# drive letter followed by a path
try:
file_or_mod, fn = test.split(':')
if file_like(fn):
# must be a funny path
file_or_mod, fn = test, None
except ValueError:
# more than one : in the test
# this is a case like c:\some\path.py:a_test
parts = test.split(':')
if len(parts[0]) == 1:
file_or_mod, fn = ':'.join(parts[:-1]), parts[-1]
else:
# nonsense like foo:bar:baz
raise ValueError("Test name '%s' could not be parsed. Please "
"format test names as path:callable or "
"module:callable." % (test,))
elif not tail:
# this is a case like 'foo:bar/'
# : must be part of the file path, so ignore it
file_or_mod = test
else:
if ':' in tail:
file_part, fn = tail.split(':')
else:
file_part = tail
file_or_mod = os.sep.join([head, file_part])
if file_or_mod:
if file_like(file_or_mod):
return (norm(file_or_mod), None, fn)
else:
return (None, file_or_mod, fn)
else:
return (None, None, fn)
split_test_name.__test__ = False # do not collect
def test_address(test):
"""Find the test address for a test, which may be a module, filename,
class, method or function.
"""
if hasattr(test, "address"):
return test.address()
# type-based polymorphism sucks in general, but I believe is
# appropriate here
t = type(test)
file = module = call = None
if t == types.ModuleType:
file = getattr(test, '__file__', None)
module = getattr(test, '__name__', None)
return (src(file), module, call)
if t == types.FunctionType or issubclass(t, type) or t == types.ClassType:
module = getattr(test, '__module__', None)
if module is not None:
m = sys.modules[module]
file = getattr(m, '__file__', None)
if file is not None:
file = os.path.abspath(file)
call = getattr(test, '__name__', None)
return (src(file), module, call)
if t == types.MethodType:
cls_adr = test_address(test.im_class)
return (src(cls_adr[0]), cls_adr[1],
"%s.%s" % (cls_adr[2], test.__name__))
# handle unittest.TestCase instances
if isinstance(test, unittest.TestCase):
if (hasattr(test, '_FunctionTestCase__testFunc') # pre 2.7
or hasattr(test, '_testFunc')): # 2.7
# unittest FunctionTestCase
try:
return test_address(test._FunctionTestCase__testFunc)
except AttributeError:
return test_address(test._testFunc)
# regular unittest.TestCase
cls_adr = test_address(test.__class__)
# 2.5 compat: __testMethodName changed to _testMethodName
try:
method_name = test._TestCase__testMethodName
except AttributeError:
method_name = test._testMethodName
return (src(cls_adr[0]), cls_adr[1],
"%s.%s" % (cls_adr[2], method_name))
if (hasattr(test, '__class__') and
test.__class__.__module__ not in ('__builtin__', 'builtins')):
return test_address(test.__class__)
raise TypeError("I don't know what %s is (%s)" % (test, t))
test_address.__test__ = False # do not collect
def try_run(obj, names):
"""Given a list of possible method names, try to run them with the
provided object. Keep going until something works. Used to run
setup/teardown methods for module, package, and function tests.
"""
for name in names:
func = getattr(obj, name, None)
if func is not None:
if type(obj) == types.ModuleType:
# py.test compatibility
if isinstance(func, types.FunctionType):
args, varargs, varkw, defaults = \
inspect.getargspec(func)
else:
# Not a function. If it's callable, call it anyway
if hasattr(func, '__call__') and not inspect.ismethod(func):
func = func.__call__
try:
args, varargs, varkw, defaults = \
inspect.getargspec(func)
args.pop(0) # pop the self off
except TypeError:
raise TypeError("Attribute %s of %r is not a python "
"function. Only functions or callables"
" may be used as fixtures." %
(name, obj))
if len(args):
log.debug("call fixture %s.%s(%s)", obj, name, obj)
return func(obj)
log.debug("call fixture %s.%s", obj, name)
return func()
def src(filename):
"""Find the python source file for a .pyc, .pyo or $py.class file on
jython. Returns the filename provided if it is not a python source
file.
"""
if filename is None:
return filename
if sys.platform.startswith('java') and filename.endswith('$py.class'):
return '.'.join((filename[:-9], 'py'))
base, ext = os.path.splitext(filename)
if ext in ('.pyc', '.pyo', '.py'):
return '.'.join((base, 'py'))
return filename
def regex_last_key(regex):
"""Sort key function factory that puts items that match a
regular expression last.
>>> from nose.config import Config
>>> from nose.pyversion import sort_list
>>> c = Config()
>>> regex = c.testMatch
>>> entries = ['.', '..', 'a_test', 'src', 'lib', 'test', 'foo.py']
>>> sort_list(entries, regex_last_key(regex))
>>> entries
['.', '..', 'foo.py', 'lib', 'src', 'a_test', 'test']
"""
def k(obj):
if regex.search(obj):
return (1, obj)
return (0, obj)
return k
def tolist(val):
"""Convert a value that may be a list or a (possibly comma-separated)
string into a list. The exception: None is returned as None, not [None].
>>> tolist(["one", "two"])
['one', 'two']
>>> tolist("hello")
['hello']
>>> tolist("separate,values, with, commas, spaces , are ,ok")
['separate', 'values', 'with', 'commas', 'spaces', 'are', 'ok']
"""
if val is None:
return None
try:
# might already be a list
val.extend([])
return val
except AttributeError:
pass
# might be a string
try:
return re.split(r'\s*,\s*', val)
except TypeError:
# who knows...
return list(val)
class odict(dict):
"""Simple ordered dict implementation, based on:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/107747
"""
def __init__(self, *arg, **kw):
self._keys = []
super(odict, self).__init__(*arg, **kw)
def __delitem__(self, key):
super(odict, self).__delitem__(key)
self._keys.remove(key)
def __setitem__(self, key, item):
super(odict, self).__setitem__(key, item)
if key not in self._keys:
self._keys.append(key)
def __str__(self):
return "{%s}" % ', '.join(["%r: %r" % (k, v) for k, v in self.items()])
def clear(self):
super(odict, self).clear()
self._keys = []
def copy(self):
d = super(odict, self).copy()
d._keys = self._keys[:]
return d
def items(self):
return zip(self._keys, self.values())
def keys(self):
return self._keys[:]
def setdefault(self, key, failobj=None):
item = super(odict, self).setdefault(key, failobj)
if key not in self._keys:
self._keys.append(key)
return item
def update(self, dict):
super(odict, self).update(dict)
for key in dict.keys():
if key not in self._keys:
self._keys.append(key)
def values(self):
return map(self.get, self._keys)
def transplant_func(func, module):
"""
Make a function imported from module A appear as if it is located
in module B.
>>> from pprint import pprint
>>> pprint.__module__
'pprint'
>>> pp = transplant_func(pprint, __name__)
>>> pp.__module__
'nose.util'
The original function is not modified.
>>> pprint.__module__
'pprint'
Calling the transplanted function calls the original.
>>> pp([1, 2])
[1, 2]
>>> pprint([1,2])
[1, 2]
"""
from nose.tools import make_decorator
if isgenerator(func):
def newfunc(*arg, **kw):
for v in func(*arg, **kw):
yield v
else:
def newfunc(*arg, **kw):
return func(*arg, **kw)
newfunc = make_decorator(func)(newfunc)
newfunc.__module__ = module
return newfunc
def transplant_class(cls, module):
"""
Make a class appear to reside in `module`, rather than the module in which
it is actually defined.
>>> from nose.failure import Failure
>>> Failure.__module__
'nose.failure'
>>> Nf = transplant_class(Failure, __name__)
>>> Nf.__module__
'nose.util'
>>> Nf.__name__
'Failure'
"""
class C(cls):
pass
C.__module__ = module
C.__name__ = cls.__name__
return C
def safe_str(val, encoding='utf-8'):
try:
return str(val)
except UnicodeEncodeError:
if isinstance(val, Exception):
return ' '.join([safe_str(arg, encoding)
for arg in val])
return unicode(val).encode(encoding)
def is_executable(file):
if not os.path.exists(file):
return False
st = os.stat(file)
return bool(st.st_mode & (stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH))
if __name__ == '__main__':
import doctest
doctest.testmod()

16
lib/spack/llnl/util/tty/log.py
View file

@ -122,6 +122,10 @@ def __init__(self, stream, echo=False, force_color=False, debug=False):
self.force_color = force_color
self.debug = debug
# Default is to try file-descriptor reassignment unless the system
# out/err streams do not have an associated file descriptor
self.directAssignment = False
def trace(self, frame, event, arg):
"""Jumps to __exit__ on the child process."""
raise _SkipWithBlock()
@ -185,6 +189,7 @@ def __enter__(self):
# Child: redirect output, execute the with block.
os.close(read)
try:
# Save old stdout and stderr
self._stdout = os.dup(sys.stdout.fileno())
self._stderr = os.dup(sys.stderr.fileno())
@ -192,6 +197,13 @@ def __enter__(self):
# redirect to the pipe.
os.dup2(write, sys.stdout.fileno())
os.dup2(write, sys.stderr.fileno())
except AttributeError:
self.directAssignment = True
self._stdout = sys.stdout
self._stderr = sys.stderr
output_redirect = os.fdopen(write, 'w')
sys.stdout = output_redirect
sys.stderr = output_redirect
if self.force_color:
color._force_color = True
@ -218,6 +230,10 @@ def __exit__(self, exc_type, exception, traceback):
#
# TODO: think about how this works outside install.
# TODO: ideally would propagate exception to parent...
if self.directAssignment:
sys.stdout = self._stdout
sys.stderr = self._stderr
else:
os.dup2(self._stdout, sys.stdout.fileno())
os.dup2(self._stderr, sys.stderr.fileno())

20
lib/spack/spack/cmd/test.py
View file

@ -22,8 +22,10 @@
# along with this program; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##############################################################################
import os
from pprint import pprint
from llnl.util.filesystem import join_path, mkdirp
from llnl.util.tty.colify import colify
from llnl.util.lang import list_modules
@ -37,6 +39,12 @@ def setup_parser(subparser):
'names', nargs='*', help="Names of tests to run.")
subparser.add_argument(
'-l', '--list', action='store_true', dest='list', help="Show available tests")
subparser.add_argument(
'--createXmlOutput', action='store_true', dest='createXmlOutput',
help="Create JUnit XML from test results")
subparser.add_argument(
'--xmlOutputDir', dest='xmlOutputDir',
help="Nose creates XML files in this directory")
subparser.add_argument(
'-v', '--verbose', action='store_true', dest='verbose',
help="verbose output")
@ -48,4 +56,14 @@ def test(parser, args):
colify(spack.test.list_tests(), indent=2)
else:
spack.test.run(args.names, args.verbose)
if not args.createXmlOutput:
outputDir = None
else:
if not args.xmlOutputDir:
outputDir = join_path(os.getcwd(), "test-output")
else:
outputDir = os.path.abspath(args.xmlOutputDir)
if not os.path.exists(outputDir):
mkdirp(outputDir)
spack.test.run(args.names, outputDir, args.verbose)

34
lib/spack/spack/test/__init__.py
View file

@ -24,7 +24,10 @@
##############################################################################
import sys
import unittest
import nose
from spack.test.tally_plugin import Tally
from llnl.util.filesystem import join_path
import llnl.util.tty as tty
from llnl.util.tty.colify import colify
@ -67,7 +70,7 @@ def list_tests():
return test_names
def run(names, verbose=False):
def run(names, outputDir, verbose=False):
"""Run tests with the supplied names. Names should be a list. If
it's empty, run ALL of Spack's tests."""
verbosity = 1 if not verbose else 2
@ -82,27 +85,30 @@ def run(names, verbose=False):
colify(sorted(test_names), indent=4)
sys.exit(1)
runner = unittest.TextTestRunner(verbosity=verbosity)
testsRun = errors = failures = 0
tally = Tally()
for test in names:
module = 'spack.test.' + test
print module
suite = unittest.defaultTestLoader.loadTestsFromName(module)
tty.msg("Running test: %s" % test)
result = runner.run(suite)
testsRun += result.testsRun
errors += len(result.errors)
failures += len(result.failures)
succeeded = not errors and not failures
runOpts = ["--with-%s" % spack.test.tally_plugin.Tally.name]
if outputDir:
xmlOutputFname = "unittests-{0}.xml".format(test)
xmlOutputPath = join_path(outputDir, xmlOutputFname)
runOpts += ["--with-xunit",
"--xunit-file={0}".format(xmlOutputPath)]
argv = [""] + runOpts + [module]
result = nose.run(argv=argv, addplugins=[tally])
succeeded = not tally.failCount and not tally.errorCount
tty.msg("Tests Complete.",
"%5d tests run" % testsRun,
"%5d failures" % failures,
"%5d errors" % errors)
"%5d tests run" % tally.numberOfTestsRun,
"%5d failures" % tally.failCount,
"%5d errors" % tally.errorCount)
if not errors and not failures:
if succeeded:
tty.info("OK", format='g')
else:
tty.info("FAIL", format='r')

59
lib/spack/spack/test/tally_plugin.py Normal file
View file

@ -0,0 +1,59 @@
##############################################################################
# Copyright (c) 2013, Lawrence Livermore National Security, LLC.
# Produced at the Lawrence Livermore National Laboratory.
#
# This file is part of Spack.
# Written by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
# LLNL-CODE-647188
#
# For details, see https://scalability-llnl.github.io/spack
# Please also see the LICENSE file for our notice and the LGPL.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License (as published by
# the Free Software Foundation) version 2.1 dated February 1999.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
# conditions of the GNU General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##############################################################################
from nose.plugins import Plugin
import os
class Tally(Plugin):
name = 'tally'
def __init__(self):
super(Tally, self).__init__()
self.successCount = 0
self.failCount = 0
self.errorCount = 0
@property
def numberOfTestsRun(self):
"""Excludes skipped tests"""
return self.errorCount + self.failCount + self.successCount
def options(self, parser, env=os.environ):
super(Tally, self).options(parser, env=env)
def configure(self, options, conf):
super(Tally, self).configure(options, conf)
def addSuccess(self, test):
self.successCount += 1
def addError(self, test, err):
self.errorCount += 1
def addFailure(self, test, err):
self.failCount += 1
def finalize(self, result):
pass

6
lib/spack/spack/test/unit_install.py
View file

@ -90,7 +90,7 @@ def test_installing_both(self):
pkgX.installed = True
pkgY.installed = True
test_install.create_test_output(specX, [specX, specY], mo, getLogFunc=test_fetch_log)
test_install.create_test_output(specX, [specX, specY], mo, getLogFunc=mock_fetch_log)
self.assertEqual(mo.results,
{bIdX:test_install.TestResult.PASSED,
@ -101,7 +101,7 @@ def test_dependency_already_installed(self):
pkgX.installed = True
pkgY.installed = True
test_install.create_test_output(specX, [specX], mo, getLogFunc=test_fetch_log)
test_install.create_test_output(specX, [specX], mo, getLogFunc=mock_fetch_log)
self.assertEqual(mo.results, {bIdX:test_install.TestResult.PASSED})
@ -116,6 +116,6 @@ def __init__(self, init=None):
def get(self, spec):
return self.specToPkg[spec]
def test_fetch_log(path):
def mock_fetch_log(path):
return []

8
lib/spack/spack/util/executable.py
View file

@ -95,11 +95,15 @@ def streamify(arg, mode):
proc = subprocess.Popen(
cmd,
stdin=input,
stderr=error,
stdout=subprocess.PIPE if return_output else output)
stderr=subprocess.PIPE,
stdout=subprocess.PIPE)
out, err = proc.communicate()
self.returncode = proc.returncode
if not return_output:
output.write(out)
error.write(err)
rc = proc.returncode
if fail_on_error and rc != 0 and (rc not in ignore_errors):
raise ProcessError("Command exited with status %d:"