public void TestGetProduct()
        {
            int productId = 1;
            GetProductResponse response = new GetProductResponse();

            response.Product = new ProductDTO()
            {
                Id = productId
            };

            Expect.Once.On(service).Method("GetProductById").Will(Return.Value(response));
            ProductDTO product = serviceFacade.GetProductById(productId);

            Assert.AreEqual(product.Id, productId);
        }