Lib/test/test_hash.py


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

# test the invariant that
#   iff a==b then hash(a)==hash(b)
#

import test_support


def same_hash(*objlist):
    # hash each object given an raise TestFailed if
    # the hash values are not all the same
    hashed = map(hash, objlist)
    for h in hashed[1:]:
        if h != hashed[0]:
            raise TestFailed, "hashed values differ: %s" % `objlist`


same_hash(1, 1L, 1.0, 1.0+0.0j)
same_hash(int(1), long(1), float(1), complex(1))

same_hash(long(1.23e300), float(1.23e300))

same_hash(float(0.5), complex(0.5, 0.0))