public void Calculate_Total_By_CartId()
{
var shoppingCartController =
new ShoppingCartController(_shoppingCartManager, null);
var cartCustomerDto = GenerateCreateCartDto();
var actionResult = shoppingCartController.Create(cartCustomerDto);
var result = actionResult.Result as CreatedAtRouteResult;
var shoppingCart = result?.Value as ShoppingCartDto;
var item = shoppingCartController.CalculateTotals(shoppingCart?.Id);
item.Value.Total.Should().Be(59.4);
}