def test_truck_can_detach_cariage(self):
truck = Truck()
truck.current_carriage_weight = 100
truck.detach_carriage()
self.assertEqual(truck.current_carriage_weight, None)
def test_truck_can_detach_cariage(self):
truck = Truck()
truck.current_carriage_weight = 100
truck.detach_carriage()
self.assertEqual(truck.current_carriage_weight, None)
def test_truck_has_carriage_when_has(self):
truck = Truck()
truck.current_carriage_weight = 100
self.assertEqual(truck.has_carriage(), True)
def test_truck_has_carriage_when_has(self):
truck = Truck()
truck.current_carriage_weight = 100
self.assertEqual(truck.has_carriage(), True)
