public void ShouldInitialisePrice(
Price price)
{
PortionOfChips sut = new PortionOfChips(price);
sut.Price.Should().Be(price);
}
public IEnumerable <Discount> CalculateDiscounts(IEnumerable <IProduct> products)
{
if (products is null)
{
throw new ArgumentNullException(nameof(products));
}
IEnumerable <Pie> pies = products.OfType <Pie>();
IEnumerable <PortionOfChips> portionsOfChips = products.OfType <PortionOfChips>();
// A discount is only applied if a pie and a portion of chips exist, so find the minimum amount of each and batch them up.
int totalDiscounts = Math.Min(pies.Count(), portionsOfChips.Count());
List <Discount> discounts = new List <Discount>();
for (int i = 0; i < totalDiscounts; i++)
{
Pie pie = pies.ElementAt(i);
PortionOfChips portionOfChips = portionsOfChips.ElementAt(i);
decimal discountValue = (pie.Price + portionOfChips.Price) * (this.DiscountPercent / 100.0m);
discounts.Add(new Discount(new Price(discountValue), pie, portionOfChips));
}
return(discounts);
}
public void NoPieShouldNotBeIncludedInDiscount(
PieAndChipsMealDealDiscount sut)
{
PortionOfChips portionOfChips = new PortionOfChips(new PriceFaker().Generate());
IEnumerable <Discount> results = sut.CalculateDiscounts(new[] { portionOfChips });
results.Should().BeEmpty();
}
public void PieAndPortionOfChipsShouldBeDiscounted(
PieAndChipsMealDealDiscount sut)
{
PriceFaker priceFaker = new PriceFaker();
Pie pie = new Pie(priceFaker.Generate(), LocalDate.MaxIsoValue);
PortionOfChips portionOfChips = new PortionOfChips(priceFaker.Generate());
IEnumerable <Discount> results = sut.CalculateDiscounts(new IProduct[] { pie, portionOfChips });
Price expectedDicountPrice = new Price((pie.Price + portionOfChips.Price) * (sut.DiscountPercent / 100.0m));
results.Should().Contain(new Discount(expectedDicountPrice, pie, portionOfChips));
}
public void BasketShouldTotalNumberOfPortionsOfChips(
int numberOfBags,
decimal totalCost,
[Frozen(Matching.ImplementedInterfaces)] DiscountService discountService,
Basket basket)
{
for (int i = 0; i < numberOfBags; i++)
{
PortionOfChips portionOfChips = new PortionOfChips(new Price(1.80m));
basket.Add(portionOfChips);
}
basket.TotalCost.Should().Be(totalCost);
}
