Method _test_recursive_dict

Lib/test/pickletester.py:2674–2684

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

        self._test_recursive_tuple_and_list(REX_six, aslist=lambda x: x.items)

    def _test_recursive_dict(self, cls, asdict=identity, minprotocol=0):
        # Dict containing itself.
        d = cls()
        d[1] = d
        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(list(y.keys()), [1])
            self.assertIs(y[1], x)

    def test_recursive_dict(self):
        self._test_recursive_dict(dict)