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Issue 8750: Fixed MutableSet's methods to correctly handle reflexive operations, namely x -= x and x ^= x

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This commit is contained in:
Daniel Stutzbach 2010-08-24 20:49:57 +00:00
parent d8e5f2df68
commit 31da5b2f69
3 changed files with 33 additions and 9 deletions
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15
Lib/test/test_collections.py
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@ -526,6 +526,21 @@ class TestCollectionABCs(ABCTestCase):
s = MySet([5,43,2,1])
self.assertEqual(s.pop(), 1)
def test_issue8750(self):
empty = WithSet()
full = WithSet(range(10))
s = WithSet(full)
s -= s
self.assertEqual(s, empty)
s = WithSet(full)
s ^= s
self.assertEqual(s, empty)
s = WithSet(full)
s &= s
self.assertEqual(s, full)
s |= s
self.assertEqual(s, full)
def test_Mapping(self):
for sample in [dict]:
self.assertIsInstance(sample(), Mapping)