def test_accelerate_race_car_multiple_times_when_nitro_available_and_update_current_speed(
):
# Arrange
race_car = RaceCar(color='Red',
max_speed=100,
acceleration=15,
tyre_friction=15)
current_speed_value = 85
race_car.start_engine()
race_car.accelerate()
race_car.accelerate()
race_car.accelerate()
race_car.accelerate()
race_car.accelerate()
race_car.apply_brakes()
race_car.apply_brakes()
race_car.apply_brakes()
# Act
race_car.accelerate()
race_car.accelerate()
race_car.accelerate()
# Assert
assert race_car.current_speed == current_speed_value
def test_accelerate_racecar_with_minimal_values_returns_current_speed():
# Arrange
racecar = RaceCar(color="Red", max_speed=1, acceleration=1, tyre_friction=1)
racecar.start_engine()
# Act
racecar.accelerate()
# Assert
assert racecar.current_speed == 1
def test_apply_breake_racecar_current_equals_to_half_max_speed_returns_nitro_zero():
# Arrange
racecar = RaceCar(color="Red", max_speed=30, acceleration=15, tyre_friction=7)
racecar.start_engine()
racecar.accelerate()
# Act
racecar.apply_brakes()
# Assert
assert racecar.nitro == 0
def test_accelerate_racecar_returns_current_speed(
max_speed, acceleration, tyre_friction, current_speed):
# Arrange
racecar = RaceCar(color="Red", max_speed=max_speed,
acceleration=acceleration, tyre_friction=tyre_friction)
racecar.start_engine()
# Act
racecar.accelerate()
# Assert
assert racecar.current_speed == current_speed
def test_accelerate_racecar_more_than_max_limit_without_nitro_returns_current_speed():
# Arrange
racecar = RaceCar(color="Red", max_speed=25, acceleration=10, tyre_friction=7)
racecar.start_engine()
racecar.accelerate()
racecar.accelerate()
# Act
racecar.accelerate()
# Assert
assert racecar.current_speed == 25
def test_accelerate_racecar_with_different_acceleration():
# Arrange
racecar = RaceCar(color="Red", max_speed=50, acceleration=10,
tyre_friction=3)
current_speed = 30
racecar.start_engine()
# Act
racecar.accelerate()
racecar.accelerate()
racecar.accelerate()
# Assert
assert racecar.current_speed == current_speed
def test_apply_brakes_to_race_car_and_update_current_speed():
# Arrange
race_car = RaceCar(color='Red',
max_speed=100,
acceleration=10,
tyre_friction=10)
current_speed_value = 0
race_car.start_engine()
race_car.accelerate()
# Act
race_car.apply_brakes()
# Assert
assert race_car.current_speed == current_speed_value
def test_accelerate_race_car_when_engine_stoped_and_return_start_engine_to_accelerate(
capfd):
# Arrange
race_car = RaceCar(color='Red',
max_speed=20,
acceleration=10,
tyre_friction=5)
start_engine_to_accelerate = "Start the engine to accelerate\n"
# Act
race_car.accelerate()
output = capfd.readouterr()
# Assert
assert output.out == start_engine_to_accelerate
def test_accelerate_race_car_when_nitro_not_available_and_update_current_speed(
):
# Arrange
race_car = RaceCar(color='Red',
max_speed=20,
acceleration=10,
tyre_friction=5)
current_speed_value = 10
race_car.start_engine()
# Act
race_car.accelerate()
# Assert
assert race_car.current_speed == current_speed_value
def test_apply_brakes_when_race_car_current_speed_is_more_than_tyre_friction_and_update_current_speed(
):
# Arrange
race_car = RaceCar(color='Red',
max_speed=4,
acceleration=4,
tyre_friction=3)
current_speed_value = 1
race_car.start_engine()
race_car.accelerate()
# Act
race_car.apply_brakes()
# Assert
assert race_car.current_speed == current_speed_value
def test_apply_brakes_to_race_car_when_current_speed_not_more_than_half_the_max_speed_and_nitro_value(
):
# Arrange
race_car = RaceCar(color='Red',
max_speed=100,
acceleration=20,
tyre_friction=10)
current_speed_value = 0
race_car.start_engine()
race_car.accelerate()
race_car.accelerate()
nitro_value = 0
# Act
race_car.apply_brakes()
# Assert
assert race_car.nitro == nitro_value
def test_accelerate_race_car_when_current_speed_reaches_maximum_and_update_current_speed(
):
# Arrange
race_car = RaceCar(color='Red',
max_speed=30,
acceleration=10,
tyre_friction=5)
current_speed_value = 30
race_car.start_engine()
# Act
race_car.accelerate()
race_car.accelerate()
race_car.accelerate()
race_car.accelerate()
# Assert
assert race_car.current_speed == current_speed_value
def test_apply_break_when_current_speed_is_less_than_max_speed_returns_current_speed():
# Arrange
racecar1 = RaceCar(color="None", max_speed=100, acceleration=10, tyre_friction=1)
racecar1.start_engine()
racecar1.accelerate()
racecar1.accelerate()
racecar1.accelerate()
racecar1.accelerate()
racecar1.accelerate()
racecar1.accelerate()
racecar1.accelerate()
racecar1.accelerate()
racecar1.apply_brakes()
# Act
racecar1.accelerate()
# Assert
assert racecar1.current_speed == 92
def test_accelerate_race_car_when_nitro_available_and_update_current_speed():
import math
# Arrange
color = 'Red'
max_speed = 20
acceleration = 6
tyre_friction = 3
race_car = RaceCar(color=color,
max_speed=max_speed,
acceleration=acceleration,
tyre_friction=tyre_friction)
current_speed_value = math.ceil((2 * acceleration - tyre_friction) +
(0.3) * acceleration + acceleration)
race_car.start_engine()
race_car.accelerate()
race_car.accelerate()
race_car.apply_brakes()
# Act
race_car.accelerate()
# Assert
assert race_car.current_speed == current_speed_value
def test_accelerate_racecar_more_than_max_speed_returns_current_speed_equal_to_max_speed():
# Arrange
racecar = RaceCar(color="Red", max_speed=50, acceleration=10,
tyre_friction=3)
current_speed = 50
racecar.start_engine()
# Act
racecar.accelerate()
racecar.accelerate()
racecar.accelerate()
racecar.accelerate()
racecar.accelerate()
racecar.accelerate()
racecar.accelerate()
# Assert
assert racecar.current_speed == current_speed