private decimal?PromotionPrice(string productName, decimal productPrice, int quantity, PricingStrategy pricingStrategy)
{
var promotions = promotionRepository.FindByProduct(productName);
if (!promotions.Any())
{
return(null);
}
decimal?price = null;
foreach (var promotion in promotions)
{
IApplyPromotion applyPromotion = null;
switch (promotion.PromotionType)
{
case PromotionType.OnSale:
applyPromotion = new ApplyOnSalePromotion(promotion.Price.Value);
break;
case PromotionType.GroupSale:
applyPromotion = new ApplyGroupSalePromotion(promotion.Quantity.Value, promotion.Price.Value, productPrice);
break;
case PromotionType.AdditionalSale:
applyPromotion = new ApplyAdditionalSalePromotion(promotion.Quantity.Value, promotion.Discount.Value, productPrice);
break;
default:
throw new PromotionTypeUnhandledException(promotion.PromotionType);
}
var promotionPrice = applyPromotion.Apply(quantity);
if (!promotionPrice.HasValue)
{
continue;
}
price = !price.HasValue
? promotionPrice
: (pricingStrategy == PricingStrategy.Lowest && promotionPrice < price
? promotionPrice
: (pricingStrategy == PricingStrategy.Highest && promotionPrice > price
? promotionPrice : price));
}
return(price);
}
public void FindByProductName(string productName)
{
var applePromotions = promotionRepository.FindByProduct(productName);
Assert.True(applePromotions.Any());
}