Method test_hash

Lib/test/test_functools.py:1164–1170

(self)

                         [0, 1, 1, 2, 3, 4, 5, 7, 10])

    def test_hash(self):
        def mycmp(x, y):
            return y - x
        key = self.cmp_to_key(mycmp)
        k = key(10)
        self.assertRaises(TypeError, hash, k)
        self.assertNotIsInstance(k, collections.abc.Hashable)

    @unittest.skipIf(support.MISSING_C_DOCSTRINGS,
                     "Signature information for builtins requires docstrings")