public void Quantity_in_Basket_cannot_be_negative()
{
var expectedItem = new BasketItem(new CatalogItem("Item 1", "1234item", 10.50), 5);
var basket = new Basket(new List <BasketItem>());
basket.AddItem(expectedItem);
Assert.IsTrue(basket.ReturnItemQuantity(expectedItem.CatalogItem.ItemId) == 5);
expectedItem.SetQuantity(100);
basket.RemoveItem(expectedItem);
Assert.IsTrue(basket.ReturnItemQuantity(expectedItem.CatalogItem.ItemId) == 0);
}
public void Decrease_quantity_of_existing_item_inBasket()
{
var expectedItem = new BasketItem(new CatalogItem("Item 1", "1234item", 10.50), 5);
var basket = new Basket(new List <BasketItem>());
basket.AddItem(expectedItem);
Assert.IsTrue(basket.ReturnItemQuantity(expectedItem.CatalogItem.ItemId) == 5);
expectedItem.SetQuantity(2);
basket.RemoveItem(expectedItem);
Assert.IsTrue(basket.ReturnItemQuantity(expectedItem.CatalogItem.ItemId) == 3);
}