public void GivenTwoItemsHaveBeenScanned_WhenGetTotalPrice_ThenTheSumOfItemPriceIsReturned()
{
ICheckout checkout = Mocker.CreateInstance <Checkout>();
Mocker.GetMock <IItemLookup>().Setup(scanner => scanner.Lookup('A')).Returns(new CheckoutItem('A', 50));
Mocker.GetMock <IItemLookup>().Setup(scanner => scanner.Lookup('B')).Returns(new CheckoutItem('B', 30));
checkout.AppendItem('A');
checkout.AppendItem('B');
var totalPrice = checkout.GetTotalPrice();
totalPrice.Should().Be(80);
}
public void WhenAnInvalidItemCodeIsScanned_ThenItIsNotAddedToTheCheckout()
{
ICheckout checkout = Mocker.CreateInstance <Checkout>();
Mocker.GetMock <IItemLookup>().Setup(scanner => scanner.Lookup('E')).Returns((CheckoutItem)null);
checkout.AppendItem('E');
var totalPrice = checkout.GetTotalPrice();
totalPrice.Should().Be(0);
}
public void WhenScanSingleItem_ThenItemShouldBeInstantiated(char itemCode, decimal itemPrice)
{
ICheckout checkout = Mocker.CreateInstance <Checkout>();
ICheckoutItem expectedCheckoutItem = new CheckoutItem(itemCode, itemPrice);
Mocker.GetMock <IItemLookup>()
.Setup(scanner => scanner.Lookup(itemCode))
.Returns(expectedCheckoutItem);
var item = checkout.AppendItem(itemCode);
item.ItemCode.Should().Be(itemCode);
item.ItemPrice.Should().Be(itemPrice);
}
public void EnterLoop()
{
_checkoutMessagePrinter.PrintWelcomeMessage();
do
{
var itemCode = _itemScanner.Scan();
if (itemCode == 'X')
{
break;
}
_checkout.AppendItem(itemCode);
} while (true);
_checkoutMessagePrinter.PrintTotalPrice(_checkout.GetTotalPrice());
}