mirror of https://github.com/python/cpython
Tests for unittest.TestCase.maxDiff.
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@ -596,6 +596,8 @@ class Test_TestCase(unittest.TestCase, TestEquality, TestHashing):
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seq2 = 'b' + 'x' * 80**2
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diff = '\n'.join(difflib.ndiff(pprint.pformat(seq1).splitlines(),
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pprint.pformat(seq2).splitlines()))
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# the +1 is the leading \n added by assertSequenceEqual
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omitted = unittest.case.DIFF_OMITTED % (len(diff) + 1,)
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self.maxDiff = len(diff)//2
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try:
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@ -605,6 +607,7 @@ class Test_TestCase(unittest.TestCase, TestEquality, TestHashing):
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else:
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self.fail('assertSequenceEqual did not fail.')
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self.assertTrue(len(msg) < len(diff))
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self.assertIn(omitted, msg)
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self.maxDiff = len(diff) * 2
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try:
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@ -614,6 +617,7 @@ class Test_TestCase(unittest.TestCase, TestEquality, TestHashing):
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else:
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self.fail('assertSequenceEqual did not fail.')
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self.assertTrue(len(msg) > len(diff))
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self.assertNotIn(omitted, msg)
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self.maxDiff = None
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try:
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@ -623,6 +627,41 @@ class Test_TestCase(unittest.TestCase, TestEquality, TestHashing):
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else:
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self.fail('assertSequenceEqual did not fail.')
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self.assertTrue(len(msg) > len(diff))
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self.assertNotIn(omitted, msg)
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def testTruncateMessage(self):
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self.maxDiff = 1
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message = self._truncateMessage('foo', 'bar')
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omitted = unittest.case.DIFF_OMITTED % len('bar')
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self.assertEqual(message, 'foo' + omitted)
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self.maxDiff = None
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message = self._truncateMessage('foo', 'bar')
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self.assertEqual(message, 'foobar')
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def testAssertDictEqualTruncates(self):
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test = unittest.TestCase('assertEqual')
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def truncate(msg, diff):
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return 'foo'
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test._truncateMessage = truncate
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try:
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test.assertDictEqual({}, {1: 0})
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except self.failureException as e:
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self.assertEqual(str(e), 'foo')
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else:
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self.fail('assertDictEqual did not fail')
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def testAssertMultiLineEqualTruncates(self):
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test = unittest.TestCase('assertEqual')
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def truncate(msg, diff):
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return 'foo'
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test._truncateMessage = truncate
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try:
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test.assertMultiLineEqual('foo', 'bar')
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except self.failureException as e:
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self.assertEqual(str(e), 'foo')
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else:
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self.fail('assertMultiLineEqual did not fail')
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def testAssertItemsEqual(self):
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a = object()
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