--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Lib/test/test_hash.py Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,120 @@
+# test the invariant that
+# iff a==b then hash(a)==hash(b)
+#
+# Also test that hash implementations are inherited as expected
+
+import unittest
+from test import test_support
+from collections import Hashable
+
+
+class HashEqualityTestCase(unittest.TestCase):
+
+ def same_hash(self, *objlist):
+ # Hash each object given and fail if
+ # the hash values are not all the same.
+ hashed = map(hash, objlist)
+ for h in hashed[1:]:
+ if h != hashed[0]:
+ self.fail("hashed values differ: %r" % (objlist,))
+
+ def test_numeric_literals(self):
+ self.same_hash(1, 1L, 1.0, 1.0+0.0j)
+ self.same_hash(0, 0L, 0.0, 0.0+0.0j)
+ self.same_hash(-1, -1L, -1.0, -1.0+0.0j)
+ self.same_hash(-2, -2L, -2.0, -2.0+0.0j)
+
+ def test_coerced_integers(self):
+ self.same_hash(int(1), long(1), float(1), complex(1),
+ int('1'), float('1.0'))
+ self.same_hash(int(-2**31), long(-2**31), float(-2**31))
+ self.same_hash(int(1-2**31), long(1-2**31), float(1-2**31))
+ self.same_hash(int(2**31-1), long(2**31-1), float(2**31-1))
+ # for 64-bit platforms
+ self.same_hash(int(2**31), long(2**31), float(2**31))
+ self.same_hash(int(-2**63), long(-2**63), float(-2**63))
+ self.same_hash(int(1-2**63), long(1-2**63))
+ self.same_hash(int(2**63-1), long(2**63-1))
+
+ def test_coerced_floats(self):
+ self.same_hash(long(1.23e300), float(1.23e300))
+ self.same_hash(float(0.5), complex(0.5, 0.0))
+
+
+_default_hash = object.__hash__
+class DefaultHash(object): pass
+
+_FIXED_HASH_VALUE = 42
+class FixedHash(object):
+ def __hash__(self):
+ return _FIXED_HASH_VALUE
+
+class OnlyEquality(object):
+ def __eq__(self, other):
+ return self is other
+ # Trick to suppress Py3k warning in 2.x
+ __hash__ = None
+del OnlyEquality.__hash__
+
+class OnlyInequality(object):
+ def __ne__(self, other):
+ return self is not other
+
+class OnlyCmp(object):
+ def __cmp__(self, other):
+ return cmp(id(self), id(other))
+ # Trick to suppress Py3k warning in 2.x
+ __hash__ = None
+del OnlyCmp.__hash__
+
+class InheritedHashWithEquality(FixedHash, OnlyEquality): pass
+class InheritedHashWithInequality(FixedHash, OnlyInequality): pass
+class InheritedHashWithCmp(FixedHash, OnlyCmp): pass
+
+class NoHash(object):
+ __hash__ = None
+
+class HashInheritanceTestCase(unittest.TestCase):
+ default_expected = [object(),
+ DefaultHash(),
+ OnlyEquality(),
+ OnlyInequality(),
+ OnlyCmp(),
+ ]
+ fixed_expected = [FixedHash(),
+ InheritedHashWithEquality(),
+ InheritedHashWithInequality(),
+ InheritedHashWithCmp(),
+ ]
+ error_expected = [NoHash()]
+
+ def test_default_hash(self):
+ for obj in self.default_expected:
+ self.assertEqual(hash(obj), _default_hash(obj))
+
+ def test_fixed_hash(self):
+ for obj in self.fixed_expected:
+ self.assertEqual(hash(obj), _FIXED_HASH_VALUE)
+
+ def test_error_hash(self):
+ for obj in self.error_expected:
+ self.assertRaises(TypeError, hash, obj)
+
+ def test_hashable(self):
+ objects = (self.default_expected +
+ self.fixed_expected)
+ for obj in objects:
+ self.assert_(isinstance(obj, Hashable), repr(obj))
+
+ def test_not_hashable(self):
+ for obj in self.error_expected:
+ self.assertFalse(isinstance(obj, Hashable), repr(obj))
+
+
+def test_main():
+ test_support.run_unittest(HashEqualityTestCase,
+ HashInheritanceTestCase)
+
+
+if __name__ == "__main__":
+ test_main()