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-rw-r--r--Lib/unittest/test/test_case.py25
1 files changed, 21 insertions, 4 deletions
diff --git a/Lib/unittest/test/test_case.py b/Lib/unittest/test/test_case.py
index 7dbc009..840defd 100644
--- a/Lib/unittest/test/test_case.py
+++ b/Lib/unittest/test/test_case.py
@@ -591,20 +591,37 @@ class Test_TestCase(unittest.TestCase, TestEquality, TestHashing):
self.assertRaises(self.failureException, self.assertDictEqual, 1, 1)
def testAssertSequenceEqualMaxDiff(self):
+ self.assertEqual(self.maxDiff, 80*8)
seq1 = 'a' + 'x' * 80**2
seq2 = 'b' + 'x' * 80**2
diff = '\n'.join(difflib.ndiff(pprint.pformat(seq1).splitlines(),
pprint.pformat(seq2).splitlines()))
+
+ self.maxDiff = len(diff)//2
try:
- self.assertSequenceEqual(seq1, seq2, max_diff=len(diff)/2)
- except AssertionError as e:
+ self.assertSequenceEqual(seq1, seq2)
+ except self.failureException as e:
msg = e.args[0]
+ else:
+ self.fail('assertSequenceEqual did not fail.')
self.assertTrue(len(msg) < len(diff))
+ self.maxDiff = len(diff) * 2
+ try:
+ self.assertSequenceEqual(seq1, seq2)
+ except self.failureException as e:
+ msg = e.args[0]
+ else:
+ self.fail('assertSequenceEqual did not fail.')
+ self.assertTrue(len(msg) > len(diff))
+
+ self.maxDiff = None
try:
- self.assertSequenceEqual(seq1, seq2, max_diff=len(diff)*2)
- except AssertionError as e:
+ self.assertSequenceEqual(seq1, seq2)
+ except self.failureException as e:
msg = e.args[0]
+ else:
+ self.fail('assertSequenceEqual did not fail.')
self.assertTrue(len(msg) > len(diff))
def testAssertItemsEqual(self):