public void RemoveDiscountFromProduct_With_AddProduct() { var product = new Product() { Category = "Computer Accessaries", Discount = 10, Name = "Wireless Mouse", ProductId = 1, OriginalPrice = 300, HasAnyPromotionalOffer = true, PromotionalOffer = PromotionalOffer.ByTwoGetOneFree }; _productRepo.AddProduct(product); _discountRepo.RemoveDiscountFromProduct(product.ProductId); var productList = _productRepo.GetAllProducts(); Assert.IsTrue(productList[0].Discount == 0); }