public void SetUp()
{
_mock = new Mock<ICalculateDiscountForBooks>();
_shoppingCart = new ShoppingCart(new List<ICalculateDiscountForBooks> {_mock.Object});
}
public void Should_calculate_correct_price()
{
var shoppingCart = new ShoppingCart(new List<ICalculateDiscountForBooks>
{
new CalculateDiscountForTwoBooks(),
new CalculateDiscountForThreeBooks(),
new CalculateDiscountForFourBooks(),
new CalculateDiscountForFiveBooks()
});
shoppingCart.Add(new Book("id1", "name", 8));
shoppingCart.Add(new Book("id1", "name", 8));
shoppingCart.Add(new Book("id2", "name", 8));
shoppingCart.Add(new Book("id2", "name", 8));
shoppingCart.Add(new Book("id3", "name", 8));
shoppingCart.Add(new Book("id3", "name", 8));
shoppingCart.Add(new Book("id4", "name", 8));
shoppingCart.Add(new Book("id5", "name", 8));
shoppingCart.CalculateTotalPrice().Should().Be(51.6m);
}