diff options
Diffstat (limited to 'src/python/stdlib/test/test_hash.py')
| -rw-r--r-- | src/python/stdlib/test/test_hash.py | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/src/python/stdlib/test/test_hash.py b/src/python/stdlib/test/test_hash.py deleted file mode 100644 index d2571d0..0000000 --- a/src/python/stdlib/test/test_hash.py +++ /dev/null @@ -1,144 +0,0 @@ -# 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)) - self.same_hash(long(2**63), float(2**63)) - - 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.assertIsInstance(obj, Hashable) - - def test_not_hashable(self): - for obj in self.error_expected: - self.assertNotIsInstance(obj, Hashable) - - -# Issue #4701: Check that some builtin types are correctly hashable -# (This test only used to fail in Python 3.0, but has been included -# in 2.x along with the lazy call to PyType_Ready in PyObject_Hash) -class DefaultIterSeq(object): - seq = range(10) - def __len__(self): - return len(self.seq) - def __getitem__(self, index): - return self.seq[index] - -class HashBuiltinsTestCase(unittest.TestCase): - hashes_to_check = [xrange(10), - enumerate(xrange(10)), - iter(DefaultIterSeq()), - iter(lambda: 0, 0), - ] - - def test_hashes(self): - _default_hash = object.__hash__ - for obj in self.hashes_to_check: - self.assertEqual(hash(obj), _default_hash(obj)) - -def test_main(): - test_support.run_unittest(HashEqualityTestCase, - HashInheritanceTestCase, - HashBuiltinsTestCase) - - -if __name__ == "__main__": - test_main() |
