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| author | Raymond Hettinger <python@rcn.com> | 2005-07-05 05:34:43 (GMT) |
|---|---|---|
| committer | Raymond Hettinger <python@rcn.com> | 2005-07-05 05:34:43 (GMT) |
| commit | 82cb9a235de45074d578d46bbf6680e726b13efd (patch) | |
| tree | 564cc47075abcdfdd67ebdd1e75ee5b09df78bf5 /Lib/test/test_set.py | |
| parent | 2dfc168bc3b92a0087a3a619b7f793240528936a (diff) | |
| download | cpython-82cb9a235de45074d578d46bbf6680e726b13efd.zip cpython-82cb9a235de45074d578d46bbf6680e726b13efd.tar.gz cpython-82cb9a235de45074d578d46bbf6680e726b13efd.tar.bz2 | |
Add test for hash commutativity.
Diffstat (limited to 'Lib/test/test_set.py')
| -rw-r--r-- | Lib/test/test_set.py | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py index 26e38ab..46e4000 100644 --- a/Lib/test/test_set.py +++ b/Lib/test/test_set.py @@ -5,6 +5,7 @@ import operator import copy import pickle import os +from random import randrange, shuffle class PassThru(Exception): pass @@ -399,6 +400,15 @@ class TestFrozenSet(TestJointOps): self.assertEqual(hash(self.thetype('abcdeb')), hash(self.thetype('ebecda'))) + # make sure that all permutations give the same hash value + n = 100 + seq = [randrange(n) for i in xrange(n)] + results = set() + for i in xrange(200): + shuffle(seq) + results.add(hash(self.thetype(seq))) + self.assertEqual(len(results), 1) + def test_copy(self): dup = self.s.copy() self.assertEqual(id(self.s), id(dup)) |