private static void CreateOrder(IOrderApplication application, Guid custumerId) { var order = new OrderModel() { CustumerId = custumerId, Date = DateTime.Now, Details = new OrderDetailModel[] { new() { ProductId = Guid.Parse("0353853f-6b34-4b2c-9c98-e51e61ec45d4"), Quantity = 10 }, } }; var result = application.Create(order).Result; Assert.IsTrue(result.IsValid); }