Method test_dict_copy_order

Lib/test/test_dict.py:1410–1438

(self)

        self.assertEqual(list(reversed(A(0, 1).__dict__)), ['y'])

    def test_dict_copy_order(self):
        # bpo-34320
        od = collections.OrderedDict([('a', 1), ('b', 2)])
        od.move_to_end('a')
        expected = list(od.items())

        copy = dict(od)
        self.assertEqual(list(copy.items()), expected)

        # dict subclass doesn't override __iter__
        class CustomDict(dict):
            pass

        pairs = [('a', 1), ('b', 2), ('c', 3)]

        d = CustomDict(pairs)
        self.assertEqual(pairs, list(dict(d).items()))

        class CustomReversedDict(dict):
            def keys(self):
                return reversed(list(dict.keys(self)))

            __iter__ = keys

            def items(self):
                return reversed(dict.items(self))

        d = CustomReversedDict(pairs)
        self.assertEqual(pairs[::-1], list(dict(d).items()))

    @support.cpython_only
    def test_dict_items_result_gc(self):