public void ScenarioCTest() { decimal totalCartAmount = 0.0M, totalPromotionDiscount = 0.0M; AddProduct(); AddPromotionTypes(); AddScenarioCProductToCart(); PromotionEngine promotionEngine = new PromotionEngine(_promotionTypes); totalCartAmount = _customerCart.GetTotalCartAmount(); totalPromotionDiscount = promotionEngine.GetPromotionDiscount(_customerCart.CustomerItems); Assert.AreEqual(280, totalCartAmount - totalPromotionDiscount); }