def test_apply_break_when_current_speed_is_less_than_tyre_friction():
# Arrange
truck = Truck(color="Red", max_speed=50, acceleration=10,
tyre_friction=30, max_cargo_weight=100)
current_speed = 0
truck.start_engine()
truck.accelerate()
# Act
truck.apply_brakes()
# Assert
assert truck.current_speed == current_speed
def test_apply_break_when_current_speed_with_different_acceleration_more_than_tyre_friction_returns_current_speed():
# Arrange
truck = Truck(color="Red", max_speed=50, acceleration=10,
tyre_friction=3, max_cargo_weight=100)
current_speed = 27
truck.start_engine()
truck.accelerate()
truck.accelerate()
truck.accelerate()
# Act
truck.apply_brakes()
# Assert
assert truck.current_speed == current_speed
def test_apply_brakes_when_truck_current_speed_is_more_than_tyre_friction_and_update_current_speed(
):
# Arrange
truck = Truck(color='Blue',
max_speed=5,
acceleration=4,
tyre_friction=3,
max_cargo_weight=1)
truck.start_engine()
truck.accelerate()
# Act
truck.apply_brakes()
current_speed_value = 1
# Assert
assert truck.current_speed == current_speed_value
