test_which: do not mutate os.environ
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1 changed files with 2 additions and 2 deletions
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@ -89,8 +89,8 @@ def test_which_with_slash_ignores_path(tmpdir, working_env):
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assert exe.path == path
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def test_which(tmpdir):
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os.environ["PATH"] = str(tmpdir)
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def test_which(tmpdir, monkeypatch):
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monkeypatch.setenv("PATH", str(tmpdir))
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assert ex.which("spack-test-exe") is None
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with pytest.raises(ex.CommandNotFoundError):
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