public void UpdateItemQuantity_should_update_item_quantity(int initialQuantity, int newQuantity, int expected)
{
_baskets.Add(new Basket(_testCustomerId,
new List <Item>
{
new Item("Item1", initialQuantity)
}));
_sut.ChangeItemQuantity(_testCustomerId, "Item1", newQuantity);
_baskets.First().Items.Count.Should().Be(1);
_baskets.First().Items.First().ItemId.Should().Be("Item1");
_baskets.First().Items.First().Quantity.Should().Be(expected);
}
public Basket ChangeItemQuantity(string customerId, string itemId, int newQuantity)
{
_basketStore.ChangeItemQuantity(customerId, itemId, newQuantity);
return(GetBasketByCustomerId(customerId));
}