def test_distance_per_rotation(self):
wheels = Wheels()
self.assertIsInstance(wheels.distance_per_rotation(), float)
def test_perform_move(self):
wheels = Wheels()
self.assertEqual(wheels.wheel_rotations, 0)
wheels.perform_move()
self.assertEqual(wheels.wheel_rotations, 1)
def test_get_total_distance(self):
wheels = Wheels()
self.assertEqual(wheels.get_total_distance(), 0)
wheels.perform_move()
expected = 1 * 5.5 / .86
self.assertEqual(wheels.get_total_distance(), expected)