Method test_sub

Lib/test/test_binop.py:258–263

(self)

        self.assertEqual(Rat(1, 2) + 1.0, 1.5)

    def test_sub(self):
        self.assertEqual(Rat(7, 2) - Rat(7, 5), Rat(21, 10))
        self.assertEqual(Rat(7, 5) - 1, Rat(2, 5))
        self.assertEqual(1 - Rat(3, 5), Rat(2, 5))
        self.assertEqual(Rat(3, 2) - 1.0, 0.5)
        self.assertEqual(1.0 - Rat(1, 2), 0.5)

    def test_mul(self):
        self.assertEqual(Rat(2, 3) * Rat(5, 7), Rat(10, 21))