public void AddItem_ReturnsOk()
        {
            _productsService.GenerateData();
            _ordersController.Submit(new Order()
            {
                OrderId = _defaultOrderId
            });
            var result = _ordersController.AddItem(_defaultOrderId, _defaultProductId, _defaultQuantity);

            Assert.IsInstanceOfType(result, typeof(OkObjectResult));
        }