| import difflib | |
| from test import test_support | |
| import unittest | |
| import doctest | |
| class TestSFbugs(unittest.TestCase): | |
| def test_ratio_for_null_seqn(self): | |
| # Check clearing of SF bug 763023 | |
| s = difflib.SequenceMatcher(None, [], []) | |
| self.assertEqual(s.ratio(), 1) | |
| self.assertEqual(s.quick_ratio(), 1) | |
| self.assertEqual(s.real_quick_ratio(), 1) | |
| Doctests = doctest.DocTestSuite(difflib) | |
| test_support.run_unittest(TestSFbugs, Doctests) | |