public Money CalculatePriceReduction(IBasketLine basketLine) {
/*
* Buy N, get one free
* i.e. Buy 4, pay for 3
*/
try {
int quantity = basketLine.Quantity / (PromotionBase.AuxData + 1);
//See how many multiples we have
if (quantity * (PromotionBase.AuxData + 1) > basketLine.Quantity) {
quantity--;
}
if (quantity > 0) {
Money discount = new Money(basketLine.LinePrice);
discount.RoundingMode = RoundingMode.AlwaysRoundUp;
discount.Divide(basketLine.Quantity);
discount.Multiply(quantity);
return discount;
} else {
return new Money(0);
}
} catch (Exception e) {
LogManager.GetLogger(GetType()).Error(e);
return new Money(0);
}
}
public void TestDivide() {
Money money1 = new Money(1.23M);
money1.Divide(1.5M);
Assert.IsTrue(money1.Amount == 0.82M, "Addition failed (" + money1.ToString() + " != 0.82");
}