Method test_merge_operator

Lib/test/test_ordered_dict.py:690–731

(self)

        support.check_free_after_iterating(self, lambda d: iter(d.items()), self.OrderedDict)

    def test_merge_operator(self):
        OrderedDict = self.OrderedDict

        a = OrderedDict({0: 0, 1: 1, 2: 1})
        b = OrderedDict({1: 1, 2: 2, 3: 3})

        c = a.copy()
        d = a.copy()
        c |= b
        d |= list(b.items())
        expected = OrderedDict({0: 0, 1: 1, 2: 2, 3: 3})
        self.assertEqual(a | dict(b), expected)
        self.assertEqual(a | b, expected)
        self.assertEqual(c, expected)
        self.assertEqual(d, expected)

        c = b.copy()
        c |= a
        expected = OrderedDict({1: 1, 2: 1, 3: 3, 0: 0})
        self.assertEqual(dict(b) | a, expected)
        self.assertEqual(b | a, expected)
        self.assertEqual(c, expected)

        self.assertIs(type(a | b), OrderedDict)
        self.assertIs(type(dict(a) | b), OrderedDict)
        self.assertIs(type(a | dict(b)), OrderedDict)

        expected = a.copy()
        a |= ()
        a |= ""
        self.assertEqual(a, expected)

        with self.assertRaises(TypeError):
            a | None
        with self.assertRaises(TypeError):
            a | ()
        with self.assertRaises(TypeError):
            a | "BAD"
        with self.assertRaises(TypeError):
            a | ""
        with self.assertRaises(ValueError):
            a |= "BAD"

    @support.cpython_only
    def test_ordered_dict_items_result_gc(self):