public static void One_A_Item_Costs_50()
{
var cart = new ShoppingCart(nullProcessor);
var aItem1 = new Item {Name = "A", Price = 50};
cart.AddItem(aItem1);
Assert.AreEqual(cart.Total, 50);
}
public static void One_B_Item_Costs_100()
{
var cart = new ShoppingCart(nullProcessor);
var bItem1 = new Item {Name = "B", Price = 100};
cart.AddItem(bItem1);
Assert.AreEqual(cart.Total, 100);
}
public static void B_Item_Discount_Processor_Applies_Discount_Of_15_To_2_B_Items()
{
var discountProcessor = new BItemDiscountProcessor();
var bItem1 = new Item { Name = "B", Price = 30 };
var bItem2 = new Item { Name = "B", Price = 30 };
var items = new List<Item>
{
bItem1,
bItem2
};
var discountResult = discountProcessor.CalculateDiscountForItems(items);
var discount = discountResult.DiscountAwarded;
Assert.AreEqual(discount, 15);
}
public static void Four_A_Items_And_Two_B_Items_Costs_225()
{
var cart = new ShoppingCart(discountProcessors);
var aItem1 = new Item { Name = "A", Price = 50 };
var aItem2 = new Item { Name = "A", Price = 50 };
var aItem3 = new Item { Name = "A", Price = 50 };
var aItem4 = new Item { Name = "A", Price = 50 };
var bItem1 = new Item { Name = "B", Price = 30 };
var bItem2 = new Item { Name = "B", Price = 30 };
cart.AddItem(aItem1);
cart.AddItem(aItem2);
cart.AddItem(aItem3);
cart.AddItem(aItem4);
cart.AddItem(bItem1);
cart.AddItem(bItem2);
Assert.AreEqual(cart.Total, 225);
}
public static void A_Item_Discount_Processor_Applies_Discount_Of_20_To_5_A_Items()
{
var discountProcessor = new AItemDiscountProcessor();
var aItem1 = new Item { Name = "A", Price = 50 };
var aItem2 = new Item { Name = "A", Price = 50 };
var aItem3 = new Item { Name = "A", Price = 50 };
var aItem4 = new Item { Name = "A", Price = 50 };
var aItem5 = new Item { Name = "A", Price = 50 };
var items = new List<Item>
{
aItem1, aItem2, aItem3, aItem4, aItem5
};
var discountResult = discountProcessor.CalculateDiscountForItems(items);
var discount = discountResult.DiscountAwarded;
Assert.AreEqual(discount, 20);
}
public static void Two_A_Items_Costs_100()
{
var cart = new ShoppingCart(nullProcessor);
var aItem1 = new Item {Name = "A", Price = 50};
var aItem2 = new Item {Name = "A", Price = 50};
cart.AddItem(aItem1);
cart.AddItem(aItem2);
Assert.AreEqual(cart.Total, 100);
}
public static void Three_A_Items_Applies_Discount_Costing_130()
{
var aItemDiscountProcessor = new AItemDiscountProcessor();
var cart = new ShoppingCart(new List<IDiscountProcessor> {aItemDiscountProcessor});
var aItem1 = new Item {Name = "A", Price = 50};
var aItem2 = new Item {Name = "A", Price = 50};
var aItem3 = new Item {Name = "A", Price = 50};
cart.AddItem(aItem1);
cart.AddItem(aItem2);
cart.AddItem(aItem3);
Assert.AreEqual(cart.Total, 130);
}
