public void Calculate_WhenNoItems_ReturnsZero()
{
_offersService.Setup(_ => _.GetAllDiscounts(new List <string>(), _itemCatalogue.Object)).Returns(0);
var sut = new Checkout(_itemCatalogue.Object, _offersService.Object);
Assert.That(sut.Calculate(_basket.Object), Is.EqualTo(0));
}
public void WhenICalculateTheTotal()
{
IOffersService offersService = new OffersService();
offersService.AddOffer(new BuyThreeMilksGetFourthFreeOffer());
offersService.AddOffer(new BuyTwoButtersAndGetABreadHalfPriceOffer());
var checkout = new Checkout(new ItemCatalogue(), offersService);
Total = checkout.Calculate(_basket);
}
public void Calculate_WhenItemsAndDiscounts_ReturnsTotal()
{
var scannedItems = new List <string> {
Item1, Item2
};
_itemCatalogue.Setup(_ => _.LookupPrice(Item1)).Returns(Item1Price);
_itemCatalogue.Setup(_ => _.LookupPrice(Item2)).Returns(Item2Price);
_offersService.Setup(_ => _.GetAllDiscounts(scannedItems, _itemCatalogue.Object)).Returns(TotalDiscount);
_basket.SetupSequence(_ => _.Take())
.Returns(Item1)
.Returns(Item2)
.Returns((string)null);
var sut = new Checkout(_itemCatalogue.Object, _offersService.Object);
Assert.That(sut.Calculate(_basket.Object), Is.EqualTo(Item1Price + Item2Price + TotalDiscount));
}