Method test___sizeof__

Lib/test/test_long.py:1660–1699

(self)

                    (1 << (2 * bitlen)) - (1 << (bitlen + 1)) + 1)

    def test___sizeof__(self):
        self.assertEqual(int.__itemsize__, sys.int_info.sizeof_digit)

        # Pairs (test_value, number of allocated digits)
        test_values = [
            # We always allocate space for at least one digit, even for
            # a value of zero; sys.getsizeof should reflect that.
            (0, 1),
            (1, 1),
            (-1, 1),
            (BASE-1, 1),
            (1-BASE, 1),
            (BASE, 2),
            (-BASE, 2),
            (BASE*BASE - 1, 2),
            (BASE*BASE, 3),
        ]

        for value, ndigits in test_values:
            with self.subTest(value):
                self.assertEqual(
                    value.__sizeof__(),
                    int.__basicsize__ + int.__itemsize__ * ndigits
                )

        # Same test for a subclass of int.
        class MyInt(int):
            pass

        self.assertEqual(MyInt.__itemsize__, sys.int_info.sizeof_digit)

        for value, ndigits in test_values:
            with self.subTest(value):
                self.assertEqual(
                    MyInt(value).__sizeof__(),
                    MyInt.__basicsize__ + MyInt.__itemsize__ * ndigits
                )

        # GH-117195 -- This shouldn't crash
        object.__sizeof__(1)

    def test_hash(self):
        # gh-136599