Method test_views_mapping

Lib/test/test_dict.py:119–137

(self)

        self.assertEqual(repr(dict(a=1).items()), "dict_items([('a', 1)])")

    def test_views_mapping(self):
        mappingproxy = type(type.__dict__)
        class Dict(dict):
            pass
        for cls in [dict, Dict]:
            d = cls()
            m1 = d.keys().mapping
            m2 = d.values().mapping
            m3 = d.items().mapping

            for m in [m1, m2, m3]:
                self.assertIsInstance(m, mappingproxy)
                self.assertEqual(m, d)

            d["foo"] = "bar"

            for m in [m1, m2, m3]:
                self.assertIsInstance(m, mappingproxy)
                self.assertEqual(m, d)

    def test_contains(self):
        d = {}