diff options
Diffstat (limited to 'Lib/test/test_random.py')
| -rw-r--r-- | Lib/test/test_random.py | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/Lib/test/test_random.py b/Lib/test/test_random.py index afcf113..7ec130d 100644 --- a/Lib/test/test_random.py +++ b/Lib/test/test_random.py @@ -180,10 +180,9 @@ class WichmannHill_TestBasicOps(TestBasicOps): def test_bigrand(self): # Verify warnings are raised when randrange is too large for random() - oldfilters = warnings.filters[:] - warnings.filterwarnings("error", "Underlying random") - self.assertRaises(UserWarning, self.gen.randrange, 2**60) - warnings.filters[:] = oldfilters + with test_support.guard_warnings_filter(): + warnings.filterwarnings("error", "Underlying random") + self.assertRaises(UserWarning, self.gen.randrange, 2**60) class SystemRandom_TestBasicOps(TestBasicOps): gen = random.SystemRandom() @@ -441,6 +440,14 @@ 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) |