public void Test2()
{
var itemA = _productService.GetBySku("A");
int quantity = 2;
var itemB = _productService.GetBySku("C");
int quantityB = 2;
_shoppingBasket.AddToBasket(itemA, quantity);
_shoppingBasket.AddToBasket(itemB, quantityB);
var result = _shoppingBasket.GetBasket().ToList();
result.Count().Should().Be(2);
var total = _shoppingBasket.TotalPrice();
total.Should().Be(100m);
}