Method _test_recursive_dict_key

Lib/test/pickletester.py:2730–2742

(self, cls, asdict=identity, minprotocol=0)

        self._test_recursive_tuple_and_dict(REX_seven, asdict=lambda x: x.table)

    def _test_recursive_dict_key(self, cls, asdict=identity, minprotocol=0):
        # Dict containing an immutable object (as key) containing the original
        # dict.
        d = cls()
        d[K(d)] = 1
        for proto in range(minprotocol, pickle.HIGHEST_PROTOCOL + 1):
            s = self.dumps(d, proto)
            x = self.loads(s)
            self.assertIsInstance(x, cls)
            y = asdict(x)
            self.assertEqual(len(y.keys()), 1)
            self.assertIsInstance(list(y.keys())[0], K)
            self.assertIs(list(y.keys())[0].value, x)

    def test_recursive_dict_key(self):
        self._test_recursive_dict_key(dict)