public void Cart_Returns_Null_When_No_Sku_Found() {
ShoppingCart cart = new ShoppingCart("TEST");
Product p = new Product("SKU");
cart.AddItem(p, 1);
var item = cart.FindItem("SKU1");
Assert.Null(item);
}
public void Cart_Can_Return_Item_By_SKU() {
ShoppingCart cart = new ShoppingCart("TEST");
Product p = new Product("SKU");
cart.AddItem(p, 1);
var item = cart.FindItem("SKU");
Assert.NotNull(item);
}