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Viewing changes to bzrlib/tests/test_diff.py

(mbp) stop using failIf, failUnless, etc (Martin Pool)

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        output = StringIO.StringIO()
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        diff.internal_diff(u'old_\xb5', ['old_text\n'],
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                            u'new_\xe5', ['new_text\n'], output)
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        self.failUnless(isinstance(output.getvalue(), str),
 
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        self.assertIsInstance(output.getvalue(), str,
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            'internal_diff should return bytestrings')
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