Strengthen the test for hash effectiveness
diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py
index 5d37169..2104ee9 100644
--- a/Lib/test/test_set.py
+++ b/Lib/test/test_set.py
@@ -389,12 +389,12 @@
def test_hash_effectiveness(self):
n = 13
- rng = range(n)
hashvalues = set()
+ addhashvalue = hashvalues.add
+ elemmasks = [(i+1, 1<<i) for i in range(n)]
for i in xrange(2**n):
- combination = [j for j in rng if (1<<j)&i]
- hashvalues.add(hash(self.thetype(combination)))
- self.assert_(len(hashvalues) >= 2**(n-2))
+ addhashvalue(hash(frozenset([e for e, m in elemmasks if m&i])))
+ self.assertEqual(len(hashvalues), 2**n)
class FrozenSetSubclass(frozenset):
pass