private decimal CalculateDiscountValueForActiveDiscount(
Discount activeDiscount,
int qualifierProductQuantity,
int discountedProductQuantity,
decimal discountedProductUnitPrice) {
var itemsApplicableForDiscount = qualifierProductQuantity / activeDiscount.QualifierQuantity;
var discountMultiplier = itemsApplicableForDiscount >= discountedProductQuantity
? discountedProductQuantity
: itemsApplicableForDiscount;
var discountValue = ((discountedProductUnitPrice / 100m) * activeDiscount.DiscountPercentage) * discountMultiplier;
return discountValue;
}
private DiscountCalculator CreateSystemUnderTest() {
var discount = new Discount
{
Name = "buy 2 productX and get a productY at 50% off",
QualifierProductId = "product/x",
DiscountedProductId = "product/y",
DiscountPercentage = 50,
QualifierQuantity = 2,
IsActive = true
};
var repository = new FakeDiscountRepository();
repository.Save(discount);
var sut = new DiscountCalculator(repository);
return sut;
}