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Issue #24369: Defend against key-changes during iteration.

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This commit is contained in:
Eric Snow 2015-06-04 00:09:56 -06:00
parent b6c6a4dc04
commit 4fabf02633
3 changed files with 38 additions and 13 deletions
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17
Lib/test/test_collections.py
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@ -2047,6 +2047,23 @@ class CPythonOrderedDictTests(OrderedDictTests, unittest.TestCase):
del od[colliding]
self.assertEqual(list(od.items()), [(key, ...), ('after', ...)])
def test_key_change_during_iteration(self):
OrderedDict = self.module.OrderedDict
od = OrderedDict.fromkeys('abcde')
self.assertEqual(list(od), list('abcde'))
with self.assertRaises(RuntimeError):
for i, k in enumerate(od):
od.move_to_end(k)
self.assertLess(i, 5)
with self.assertRaises(RuntimeError):
for k in od:
od['f'] = None
with self.assertRaises(RuntimeError):
for k in od:
del od['c']
self.assertEqual(list(od), list('bdeaf'))
def test_issue24347(self):
OrderedDict = self.module.OrderedDict