1 # test the invariant that

     2 #   iff a==b then hash(a)==hash(b)

     3 #

     4 

     5 import unittest

     6 from test import test_support

     7 

     8 

     9 class HashEqualityTestCase(unittest.TestCase):

    10 

    11     def same_hash(self, *objlist):

    12         # Hash each object given and fail if

    13         # the hash values are not all the same.

    14         hashed = map(hash, objlist)

    15         for h in hashed[1:]:

    16             if h != hashed[0]:

    17                 self.fail("hashed values differ: %r" % (objlist,))

    18 

    19     def test_numeric_literals(self):

    20         self.same_hash(1, 1L, 1.0, 1.0+0.0j)

    21 

    22     def test_coerced_integers(self):

    23         self.same_hash(int(1), long(1), float(1), complex(1),

    24                        int('1'), float('1.0'))

    25 

    26     def test_coerced_floats(self):

    27         self.same_hash(long(1.23e300), float(1.23e300))

    28         self.same_hash(float(0.5), complex(0.5, 0.0))

    29 

    30 

    31 def test_main():

    32     test_support.run_unittest(HashEqualityTestCase)

    33 

    34 

    35 if __name__ == "__main__":

    36     test_main()