def test_distance_driven_is_number(self): test_car = Car("red", 120, "auto", "85", 100) res = test_car.get_distance_driven() # Test that the result is a number self.assertIsInstance(res, int, "Result should be a number") # Test that the result is the correct number (8500) self.assertEqual(res, 8500, "Result should be 8500 (85 x 100)")