def test_update_position():
road = Road()
car = Car(road, init_speed=10)
car2 = Car(road, position=500)
assert car.position == 0 and car.speed == 10
car.update_position(car2)
assert car.position == 0 + car.speed * car.s_per_step
def test_car_is_validating_position_with_road():
# On init
road = Road()
car1 = Car(road, position=2000)
assert car1.position == 0
# In update_position
car1 = Car(road, position=100, init_speed=10)
car2 = Car(road, position=500)
car1.position = 1000
car1.update_position(car2)
assert car1.position == 10
# In brake_if_needed
car1 = Car(road, position=1005, init_speed=10)
car2 = Car(road, position=10)
did_brake = car1.brake_if_needed(leading_car=car2)
assert did_brake is True
with mock.patch("random.random", return_value=1):
car1 = Car(road, position=500, init_speed=10)
car2 = Car(road, position=0)
did_brake = car1.brake_if_needed(leading_car=car2)
assert did_brake is False
assert car1.distance_behind(car2) == 495
def test_car_is_already_ahead_no_teleportation_error():
road = Road()
car1 = Car(road, position=5, init_speed=10, slowing_chance=0)
car2 = Car(road, position=0, init_speed=36)
car1.update_position(car2)
assert car1.position == 15.0
def test_car_has_jumped_ahead():
road = Road()
car1 = Car(road, position=5)
car2 = Car(road, position=0)
car2.update_position(car1)
