Method test_inherit

Lib/test/test_dataclasses/__init__.py:3081–3096

(self)

            del c.i

    def test_inherit(self):
        @dataclass(frozen=True)
        class C:
            i: int

        @dataclass(frozen=True)
        class D(C):
            j: int

        d = D(0, 10)
        with self.assertRaises(FrozenInstanceError):
            d.i = 5
        with self.assertRaises(FrozenInstanceError):
            d.j = 6
        self.assertEqual(d.i, 0)
        self.assertEqual(d.j, 10)

    def test_inherit_nonfrozen_from_empty_frozen(self):
        @dataclass(frozen=True)