public void CalculatePomotionShouldPassWithGivenCheckoutAmount()
{
int CheckoutAmount = 370;
int QuantityA = 5, QuantityB = 5, QuantityC = 1, QuantityD = 0;
var pA = mockProductA.Setup(x => x.CalculateAmoutForA(QuantityA)).Returns(230);
var pB = mockProductB.Setup(x => x.CalculateAmoutForB(QuantityB)).Returns(120);
var pc = mockProductC.Setup(x => x.CalculateAmoutForC(QuantityC)).Returns(20);
var pD = mockProductD.Setup(x => x.CalculateAmoutForD(QuantityC)).Returns(0);
int result = promotion.ApplyPromo(QuantityA, QuantityB, QuantityC, QuantityD);
Assert.AreEqual(CheckoutAmount, result);
}
