Lib/test/test_hash.py

   1 # test the invariant that
   2 #   iff a==b then hash(a)==hash(b)
   3 #
   4
   5 import test_support
   6
   7
   8 def same_hash(*objlist):
   9     # hash each object given an raise TestFailed if
  10     # the hash values are not all the same
  11     hashed = map(hash, objlist)
  12     for h in hashed[1:]:
  13         if h != hashed[0]:
  14             raise TestFailed, "hashed values differ: %s" % `objlist`
  15
  16
  17
  18 same_hash(1, 1L, 1.0, 1.0+0.0j)
  19 same_hash(int(1), long(1), float(1), complex(1))
  20
  21 same_hash(long(1.23e300), float(1.23e300))
  22
  23 same_hash(float(0.5), complex(0.5, 0.0))