public void TestCreateOrder()
        {
            var order = new Order();
            order.TotalPrice = (decimal)98.5;
            order.Lines = new[] {
                new OrderDetail{Product = "P1", Amount = 2},
                new OrderDetail{Product = "P2", Amount = 3}
            };

            var orderService = new OrderService();
            orderService.CreateOrder(order);
        }