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bpo-42222: Modernize integer test/conversion in randrange() (#23064)

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Raymond Hettinger 2020-12-28 11:10:34 -08:00 • committed by GitHub
parent 1031f23fc3
commit a9621bb301
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4 changed files with 81 additions and 11 deletions
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20
Lib/test/test_random.py
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@ -542,6 +542,26 @@ class SystemRandom_TestBasicOps(TestBasicOps, unittest.TestCase):
raises(0, 42, 0)
raises(0, 42, 3.14159)
def test_randrange_argument_handling(self):
randrange = self.gen.randrange
with self.assertWarns(DeprecationWarning):
randrange(10.0, 20, 2)
with self.assertWarns(DeprecationWarning):
randrange(10, 20.0, 2)
with self.assertWarns(DeprecationWarning):
randrange(10, 20, 1.0)
with self.assertWarns(DeprecationWarning):
randrange(10, 20, 2.0)
with self.assertWarns(DeprecationWarning):
with self.assertRaises(ValueError):
randrange(10.5)
with self.assertWarns(DeprecationWarning):
with self.assertRaises(ValueError):
randrange(10, 20.5)
with self.assertWarns(DeprecationWarning):
with self.assertRaises(ValueError):
randrange(10, 20, 1.5)
def test_randbelow_logic(self, _log=log, int=int):
# check bitcount transition points: 2**i and 2**(i+1)-1
# show that: k = int(1.001 + _log(n, 2))