Method test_class_attrs

Lib/test/test_dataclasses/__init__.py:724–738

(self)

                          ('d', 'E:d')])

    def test_class_attrs(self):
        # We only have a class attribute if a default value is
        #  specified, either directly or via a field with a default.
        default = object()
        @dataclass
        class C:
            x: int
            y: int = field(repr=False)
            z: object = default
            t: int = field(default=100)

        self.assertNotHasAttr(C, 'x')
        self.assertNotHasAttr(C, 'y')
        self.assertIs   (C.z, default)
        self.assertEqual(C.t, 100)

    def test_disallowed_mutable_defaults(self):
        # For the known types, don't allow mutable default values.