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Diffstat (limited to 'Lib/test/test_set.py')
| -rw-r--r-- | Lib/test/test_set.py | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py index 729cc3b209..b32d953a84 100644 --- a/Lib/test/test_set.py +++ b/Lib/test/test_set.py @@ -104,6 +104,12 @@ class TestJointOps(unittest.TestCase): self.assertEqual(self.thetype('abcba').intersection(C('ccb')), set('bc')) self.assertEqual(self.thetype('abcba').intersection(C('ef')), set('')) self.assertEqual(self.thetype('abcba').intersection(C('cbcf'), C('bag')), set('b')) + s = self.thetype('abcba') + z = s.intersection() + if self.thetype == frozenset(): + self.assertEqual(id(s), id(z)) + else: + self.assertNotEqual(id(s), id(z)) def test_isdisjoint(self): def f(s1, s2): |