public void CombineOrdersForItem_GroupsOrderByItem()
{
IGroceryItem itemA = new Mock <IGroceryItem>().Object;
IGroceryItem itemB = new Mock <IGroceryItem>().Object;
CheckoutCart cart = new CheckoutCart();
cart.Orders.Add(new GroceryItemOrderFake(itemA, 1.50M));
cart.Orders.Add(new GroceryItemOrderFake(itemB, 2.00M));
cart.Orders.Add(new GroceryItemOrderFake(itemB, 2.50M));
cart.Orders.Add(new GroceryItemOrderFake(itemB, 2.00M));
cart.Orders.Add(new GroceryItemOrderFake(itemA, 3.50M));
Assert.AreEqual(5.00M, cart.CombineOrdersForItem(itemA).Price);
Assert.AreEqual(6.50M, cart.CombineOrdersForItem(itemB).Price);
}
public void CombineOrdersForItem_ThrowsException_IfItemDoesntExist()
{
IGroceryItem itemA = new Mock <IGroceryItem>().Object;
IGroceryItem itemB = new Mock <IGroceryItem>().Object;
IGroceryItem unusedItem = new Mock <IGroceryItem>().Object;
CheckoutCart cart = new CheckoutCart();
cart.Orders.Add(new GroceryItemOrderFake(itemA, 1.50M));
cart.Orders.Add(new GroceryItemOrderFake(itemB, 2.00M));
cart.Orders.Add(new GroceryItemOrderFake(itemB, 2.50M));
cart.Orders.Add(new GroceryItemOrderFake(itemB, 2.00M));
cart.Orders.Add(new GroceryItemOrderFake(itemA, 3.50M));
Assert.ThrowsException <InvalidOperationException>(() =>
cart.CombineOrdersForItem(unusedItem));
}
