public void Then_the_quantity_of_that_product_should_update_to_match()
{
var newQty = new NonNegativeQuantity(5);
_basket.ChangeQuantityOfProduct(newQty, _product);
Assert.AreEqual(newQty.Value, _basket.Items().FirstOrDefault(i => i.Product == _product).Quantity.Value);
}
public void Then_the_product_should_be_removed()
{
var newQty = new NonNegativeQuantity(0);
_basket.ChangeQuantityOfProduct(newQty, _product);
Assert.IsNull(_basket.Items().FirstOrDefault(i => i.Product == _product));
}
public void Then_the_quantity_of_that_product_should_update_to_match()
{
var newQty = new NonNegativeQuantity(5);
_basket.ChangeQuantityOfProduct(newQty, _product);
Assert.AreEqual(newQty.Value, _basket.Items().FirstOrDefault(i => i.Product == _product).Quantity.Value);
}
public void ChangeQuantityOfProduct(NonNegativeQuantity quantity, Product product)
{
if (BasketContainsAnItemFor(product))
{
if (quantity.IsZero())
{
Remove(product);
}
else
{
GetItemFor(product).ChangeItemQtyTo(quantity);
}
}
}
public void ChangeItemQtyTo(NonNegativeQuantity quantity)
{
Quantity = quantity;
}
public void IncreaseItemQtyBy(NonNegativeQuantity quantity)
{
Quantity = Quantity.Add(quantity);
}
public BasketItem(Product product, Basket basket, NonNegativeQuantity quantity)
{
_product = product;
_basket = basket;
Quantity = quantity;
}
public Ketchup()
{
Extra = NonNegativeQuantity.Get(0);
}
public NonNegativeQuantity Add(NonNegativeQuantity quantity)
{
return(new NonNegativeQuantity(_value + quantity._value));
}
public Mayo()
{
Extra = NonNegativeQuantity.Get(0);
}
public NonNegativeQuantity Add(NonNegativeQuantity quantity)
{
return new NonNegativeQuantity(_value + quantity._value);
}
