Add test operation to tau package (#25036)

Copy over the general purpose mm matmult testcase. On test run build, execute (with mpi as needed) and process profile output.

var/spack/repos/builtin/packages/tau/package.py

@@ -331,3 +331,36 @@ def setup_run_environment(self, env):
         # in the latter case.
         if files:
             env.set('TAU_MAKEFILE', files[0])
+
+    matmult_test = join_path('examples', 'mm')
+
+    @run_after('install')
+    def setup_build_tests(self):
+        """Copy the build test files after the package is installed to an
+        install test subdirectory for use during `spack test run`."""
+        self.cache_extra_test_sources(self.matmult_test)
+
+    def _run_matmult_test(self):
+        mm_dir = join_path(self.test_suite.current_test_cache_dir, self.matmult_test)
+        self.run_test('make', ['all'], [], 0, False,
+                      'Instrument and build matrix multiplication test code',
+                      False, mm_dir)
+        test_exe = 'matmult'
+        if '+mpi' in self.spec:
+            test_args = ['-n', '4', test_exe]
+            mpiexe_list = ['mpirun', 'mpiexec', 'srun']
+            for mpiexe in mpiexe_list:
+                if which(mpiexe) is not None:
+                    self.run_test(mpiexe, test_args, [], 0, False,
+                                  'Run matmult test with mpi', False, mm_dir)
+                    break
+        else:
+            self.run_test(test_exe, [], [], 0, False,
+                          'Run sequential matmult test', False, mm_dir)
+        self.run_test('pprof', [], [], 0, False,
+                      'Run pprof profile analysis tool on profile output',
+                      False, mm_dir)
+
+    def test(self):
+        # Run mm test program pulled from the build
+        self._run_matmult_test()