public void CalculateDemeritsPoint_SpeedIsOutOfRange_ThrowArgumentOutOfRangeException(int speed)
        {
            var calculator = new DemeritsPointCalculator();

            Assert.That(() => calculator.CalculateDemeritsPoint(speed),
                        Throws.Exception.TypeOf <ArgumentOutOfRangeException>());
        }
        public void CalculateDemeritsPoint_WhenCalled_ReturnDemeritsPoint(int speed, int expectedResult)
        {
            var calculator = new DemeritsPointCalculator();

            var result = calculator.CalculateDemeritsPoint(speed);

            Assert.That(result, Is.EqualTo(expectedResult));
        }