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| author | Raymond Hettinger <python@rcn.com> | 2006-12-20 06:42:06 +0000 |
|---|---|---|
| committer | Raymond Hettinger <python@rcn.com> | 2006-12-20 06:42:06 +0000 |
| commit | 8580256f411d7be06db4e5d73874769ec8ad5603 (patch) | |
| tree | 7d6b04d1b9aa07ce291dd9d9d1833b24f38cf620 /Lib/test/test_random.py | |
| parent | 26dee3436ef648c6005a319b520d7adf9259eeff (diff) | |
| download | cpython-8580256f411d7be06db4e5d73874769ec8ad5603.tar.gz | |
Bug #1590891: random.randrange don't return correct value for big number
Needs to be backported.
Diffstat (limited to 'Lib/test/test_random.py')
| -rw-r--r-- | Lib/test/test_random.py | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Lib/test/test_random.py b/Lib/test/test_random.py index e3f05a0968..ddbcc2fd32 100644 --- a/Lib/test/test_random.py +++ b/Lib/test/test_random.py @@ -438,6 +438,14 @@ class MersenneTwister_TestBasicOps(TestBasicOps): self.assertEqual(k, numbits) # note the stronger assertion self.assert_(2**k > n > 2**(k-1)) # note the stronger assertion + def test_randrange_bug_1590891(self): + start = 1000000000000 + stop = -100000000000000000000 + step = -200 + x = self.gen.randrange(start, stop, step) + self.assert_(stop < x <= start) + self.assertEqual((x+stop)%step, 0) + _gammacoeff = (0.9999999999995183, 676.5203681218835, -1259.139216722289, 771.3234287757674, -176.6150291498386, 12.50734324009056, -0.1385710331296526, 0.9934937113930748e-05, 0.1659470187408462e-06) |