public void CalculateBasketPrice_BasketIsEmpty_ReturnsZero()
{
IBasket basket = new Basket();
IBasketCalculatorService calculator = new BasketCalculatorService(fakeProductService);
Assert.Equal(0m, calculator.CalculateBasketPrice(basket));
}
public void CalculateBasketPrice_BasketHasOneOfEachProduct_ReturnsCorrectTotal()
{
IBasket basket = new Basket();
basket.Items.Add(fakeButter);
basket.Items.Add(fakeMilk);
basket.Items.Add(fakeBread);
IBasketCalculatorService calculator = new BasketCalculatorService(fakeProductService);
Assert.Equal(2.95m, calculator.CalculateBasketPrice(basket));
}
public void CalculateBasketPrice_BasketHasTwoButterAndTwoBread_ReturnsCorrectTotalAfterOffer()
{
IBasket basket = new Basket();
basket.Items.Add(fakeButter);
basket.Items.Add(fakeButter);
basket.Items.Add(fakeBread);
basket.Items.Add(fakeBread);
IBasketCalculatorService calculator = new BasketCalculatorService(fakeProductService);
Assert.Equal(3.1m, calculator.CalculateBasketPrice(basket));
}
public void CalculateBasketPrice_BasketHasFourMilk_ReturnsCorrectTotalAfterOffer()
{
IBasket basket = new Basket();
basket.Items.Add(fakeMilk);
basket.Items.Add(fakeMilk);
basket.Items.Add(fakeMilk);
basket.Items.Add(fakeMilk);
IBasketCalculatorService calculator = new BasketCalculatorService(fakeProductService);
Assert.Equal(3.45m, calculator.CalculateBasketPrice(basket));
}
public void CalculateBasketPrice_ItemPriceHasBeenTamperedWith_BasketIsRecertifiedAndPriceCorrected()
{
IBasket basket = new Basket();
Product forgedButter = new Product
{
Id = 1,
Name = "Butter",
Price = 0.8m
};
basket.Items.Add(forgedButter);
fakeProductService.GetProducts().ReturnsForAnyArgs(new List <Product> {
fakeButter
});
IBasketCalculatorService calculator = new BasketCalculatorService(fakeProductService);
Assert.Equal(0.8m, calculator.CalculateBasketPrice(basket));
}