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bpo-27145: small_ints[x] could be returned in long_add and long_sub (GH-15716)

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HongWeipeng 2019-11-26 15:54:49 +08:00 • committed by Inada Naoki
parent 386d00cc34
commit 036fe85bd3
3 changed files with 18 additions and 7 deletions
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8
Lib/test/test_long.py
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@ -956,6 +956,14 @@ class LongTest(unittest.TestCase):
self.assertEqual(huge >> (sys.maxsize + 1), (1 << 499) + 5)
self.assertEqual(huge >> (sys.maxsize + 1000), 0)
@support.cpython_only
def test_small_ints_in_huge_calculation(self):
a = 2 ** 100
b = -a + 1
c = a + 1
self.assertIs(a + b, 1)
self.assertIs(c - a, 1)
def test_small_ints(self):
for i in range(-5, 257):
self.assertIs(i, i + 0)