public void Basket_with_single_item_and_no_promotions_should_return_unit_cost_of_that_item()
{
var itemPrice = 10M;
var basket = new List <BasketItem>()
{
new BasketItem("A", 1, itemPrice)
};
var result = Promotions.TotalAfterPromotions(basket, emptyPromotions);
result.Should().Be(itemPrice);
}
public void ScenarioB()
{
var basket = new List <BasketItem>()
{
new BasketItem("A", 5, 50),
new BasketItem("B", 5, 30),
new BasketItem("C", 1, 20)
};
var total = Promotions.TotalAfterPromotions(basket, scenarioPromotions);
total.Should().Be(370M);
}
public void SingleMultibuy()
{
var basket = new List <BasketItem>()
{
new BasketItem("A", 3, 50M)
};
var promotions = new List <Promotion>()
{
new Promotion("3A for 130", Promotions.MakeMultibuy("A", 3, 130M))
};
var result = Promotions.TotalAfterPromotions(basket, promotions);
result.Should().Be(130);
}
public void Complex_basket_with_no_promotins_returns_total()
{
var basket = new List <BasketItem>()
{
new BasketItem("A", 2, 20M),
new BasketItem("B", 3, 30M),
new BasketItem("C", 4, 40M)
};
var total = 2 * 20M + 3 * 30M + 4 * 40M;
var result = Promotions.TotalAfterPromotions(basket, emptyPromotions);
result.Should().Be(total);
}
public void SinglePairedBuy()
{
var basket = new List <BasketItem>()
{
new BasketItem("C", 1, 20M),
new BasketItem("D", 1, 15M)
};
var promotions = new List <Promotion>()
{
new Promotion("C + D for 30", Promotions.MakePairedBuy("C", "D", 30M))
};
var result = Promotions.TotalAfterPromotions(basket, promotions);
result.Should().Be(30);
}
public void Empty_basket_should_return_total_of_zero()
{
var result = Promotions.TotalAfterPromotions(emptyBasket, emptyPromotions);
result.Should().Be(0M);
}
