def test_car_pull_push_in():
road = Road([[[None, None, None], [None, None, None], [None, None, None]],
[[None, None, None], [None, None, None], [None, None, None]]])
road.push_car_in(0, Car(Directions.BOTTOM, TurnDirection.LEFT))
arr = np.array(road.in_lanes)
assert len(arr[arr != np.array(None)]) == 1
assert arr[0][0] is not None and isinstance(arr[0][0], Car)
for _ in range(10):
road.push_car_in(0, Car(Directions.BOTTOM, TurnDirection.LEFT))
arr = np.array(road.in_lanes)
assert len(arr[arr != np.array(None)]) == 1
assert arr[0][0] is not None and isinstance(arr[0][0], Car)
road.push_car_in(1, Car(Directions.BOTTOM, TurnDirection.LEFT))
arr = np.array(road.in_lanes)
assert len(arr[arr != np.array(None)]) == 2
assert arr[0][0] is not None and isinstance(arr[0][0], Car) and arr[1][0] is not None and isinstance(arr[1][0], Car)
