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| author | Raymond Hettinger <python@rcn.com> | 2006-12-20 07:43:59 (GMT) |
|---|---|---|
| committer | Raymond Hettinger <python@rcn.com> | 2006-12-20 07:43:59 (GMT) |
| commit | 5425a673316af04bd1e449e45d2d9c03ee1cce25 (patch) | |
| tree | 465270c497b4f83d0e2000446f9c4958849fdd61 /Lib/test/test_random.py | |
| parent | e65f14fcc32bbc158d222408ec310a306714ec12 (diff) | |
| download | cpython-5425a673316af04bd1e449e45d2d9c03ee1cce25.zip cpython-5425a673316af04bd1e449e45d2d9c03ee1cce25.tar.gz cpython-5425a673316af04bd1e449e45d2d9c03ee1cce25.tar.bz2 | |
Bug #1590891: random.randrange don't return correct value for big number
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 bba4c7c..6c32635 100644 --- a/Lib/test/test_random.py +++ b/Lib/test/test_random.py @@ -439,6 +439,14 @@ 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) |