diff options
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 10f431a..877adf1 100644 --- a/Lib/test/test_random.py +++ b/Lib/test/test_random.py @@ -220,6 +220,14 @@ class TestBasicOps: with self.assertRaises(IndexError): choices([], cum_weights=[], k=5) + def test_choices_subnormal(self): + # Subnormal weights would occassionally trigger an IndexError + # in choices() when the value returned by random() was large + # enough to make `random() * total` round up to the total. + # See https://bugs.python.org/msg275594 for more detail. + choices = self.gen.choices + choices(population=[1, 2], weights=[1e-323, 1e-323], k=5000) + def test_gauss(self): # Ensure that the seed() method initializes all the hidden state. In # particular, through 2.2.1 it failed to reset a piece of state used |