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Diffstat (limited to 'Lib/test/test_difflib.py')
| -rw-r--r-- | Lib/test/test_difflib.py | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Lib/test/test_difflib.py b/Lib/test/test_difflib.py index 325449a..0ba8f0e 100644 --- a/Lib/test/test_difflib.py +++ b/Lib/test/test_difflib.py @@ -76,6 +76,15 @@ class TestSFbugs(unittest.TestCase): diff_gen = difflib.unified_diff([], []) self.assertRaises(StopIteration, next, diff_gen) + def test_matching_blocks_cache(self): + # Issue #21635 + s = difflib.SequenceMatcher(None, "abxcd", "abcd") + first = s.get_matching_blocks() + second = s.get_matching_blocks() + self.assertEqual(second[0].size, 2) + self.assertEqual(second[1].size, 2) + self.assertEqual(second[2].size, 0) + def test_added_tab_hint(self): # Check fix for bug #1488943 diff = list(difflib.Differ().compare(["\tI am a buggy"],["\t\tI am a bug"])) |