public void AddItemTest_withQuantity_itemNotInCartAlready_itemAddedWithQuantity() {
ShoppingCart cart = new ShoppingCart();
Item item = new Item("Apple");
cart.AddItem(item, 3);
Assert.IsTrue(cart.DoesCartContainItem(item));
Assert.AreEqual(3, cart.GetLineItemForItem(item).Quantity);
}
public void AddItemTest_itemNotInCart_addsItem() {
ShoppingCart cart = new ShoppingCart();
Assert.AreEqual(0, cart.CountOfItems);
Item item = new Item("Apple");
cart.AddItem(item);
Assert.IsTrue(cart.DoesCartContainItem(item));
Assert.AreEqual(1, cart.CountOfItems);
}
public void AddItemTest_itemInCart_addsAdditionalItemToLineItemCount() {
ShoppingCart cart = new ShoppingCart();
Item item = new Item("Apple");
cart.AddItem(item);
Assert.IsTrue(cart.DoesCartContainItem(item));
Assert.AreEqual(1, cart.CountOfItems);
cart.AddItem(item);
Assert.AreEqual(1, cart.CountOfItems);
LineItem lineItem = cart.GetLineItemForItem(item);
Assert.AreEqual(2, lineItem.Quantity);
}