public void CalculateReducePrice_BoughtProductIsNull_ReducePriceZero()
{
var promotion = new PromotionRuleBuyMoreDiscount("promotionId", "title", 10, 5);
promotion.JoinProduct("productId", "productName");
Assert.AreEqual(true, promotion.IsExistedProduct("productId"));
var reducePrice = promotion.CalculateReducePrice(null);
Assert.AreEqual(0, reducePrice);
}
public void CalculateReducePrice_LessMeetProductQuantity_ReducePriceZero()
{
var promotion = new PromotionRuleBuyMoreDiscount("promotionId", "title", 10, 5);
promotion.JoinProduct("productId", "productName");
Assert.AreEqual(true, promotion.IsExistedProduct("productId"));
List <BoughtProduct> products = new List <BoughtProduct>
{
new BoughtProduct("productId", 1, 12, 0, null, null)
};
var reducePrice = promotion.CalculateReducePrice(products);
Assert.AreEqual(0, reducePrice);
}
public void CalculateReducePrice_EqualsMeetProductQuantity_HasReducePrice()
{
const int QUANTITY = 10;
const decimal UNIT_PRICE = 12;
var promotion = new PromotionRuleBuyMoreDiscount("promotionId", "title", QUANTITY, 5);
promotion.JoinProduct("productId", "productName");
Assert.AreEqual(true, promotion.IsExistedProduct("productId"));
List <BoughtProduct> products = new List <BoughtProduct>
{
new BoughtProduct("productId", QUANTITY, UNIT_PRICE, 0, null, null)
};
var reducePrice = promotion.CalculateReducePrice(products);
Assert.AreEqual(UNIT_PRICE * QUANTITY * 0.5M, reducePrice);
}