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bpo-29839: Raise ValueError rather than OverflowError in len() for negative values. (#701)

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Serhiy Storchaka 2017-04-16 09:37:18 +03:00 • committed by GitHub
parent 813f943c59
commit baf9f29811
3 changed files with 24 additions and 6 deletions
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8
Lib/test/test_builtin.py
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@ -770,10 +770,18 @@ class BuiltinTest(unittest.TestCase):
def __len__(self):
return 4.5
self.assertRaises(TypeError, len, FloatLen())
class NegativeLen:
def __len__(self):
return -10
self.assertRaises(ValueError, len, NegativeLen())
class HugeLen:
def __len__(self):
return sys.maxsize + 1
self.assertRaises(OverflowError, len, HugeLen())
class HugeNegativeLen:
def __len__(self):
return -sys.maxsize-10
self.assertRaises(ValueError, len, HugeNegativeLen())
class NoLenMethod(object): pass
self.assertRaises(TypeError, len, NoLenMethod())