Method test_internal_use_of_overridden_methods

Lib/test/test_decimal.py:5710–5736

(self)

            self.assertEqual(y, x+4)

    def test_internal_use_of_overridden_methods(self):
        Decimal = C.Decimal

        # Unsound subtyping
        class X(float):
            def as_integer_ratio(self):
                return 1
            def __abs__(self):
                return self

        class Y(float):
            def __abs__(self):
                return [1]*200

        class I(int):
            def bit_length(self):
                return [1]*200

        class Z(float):
            def as_integer_ratio(self):
                return (I(1), I(1))
            def __abs__(self):
                return self

        for cls in X, Y, Z:
            self.assertEqual(Decimal.from_float(cls(101.1)),
                             Decimal.from_float(101.1))

    def test_c_immutable_types(self):
        SignalDict = type(C.Context().flags)