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# If _open_bzr_log cannot open the file, then we should write the
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# warning to stderr. Since this is normally happening before logging is
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self.addCleanup(setattr, sys, 'stderr', sys.stderr)
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self.addCleanup(setattr, trace, '_bzr_log_filename',
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# Set the log file to something that cannot exist
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os.environ['BZR_LOG'] = os.getcwd() + '/no-dir/bzr.log'
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logf = trace._open_bzr_log()
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self.assertIs(None, logf)
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self.assertContainsRe(sys.stderr.getvalue(),
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'failed to open trace file: .*/no-dir/bzr.log')
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class TestVerbosityLevel(TestCase):
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def test_verbosity_level(self):