Code snippets for "How To Write Testable ASP.NET WebForms" post, part II

s1.cs

        public void Load()
        {
            if (!View.IsPostBack)
            {
                var batcher = new ServiceCallBatcher(service);
                batcher.Add(new GetProductCategoriesRequest());
                batcher.Add(new GetSuppliersRequest());
                View.ProductCategories = batcher.Get<GetProductCategoriesResponse>().ProductCategories;
                View.Suppliers = batcher.Get<GetSuppliersResponse>().Suppliers;
                View.DataBind();
            }
        }

s2.cs

        [Test]
        public void CallsTheServiceToSearchForProductsAndBindsResultsToView()
        {
            const string productPattern = "whatever";
            const int categoryId = 4;
            const int supplierId = 7;
 
            var productsToReturn = new ProductOverviewDTO[0];
            var spy = new ServiceRequestResponseSpy();
            PrepareServiceToReturnResponses(service, spy, new GetProductOverviewsResponse(productsToReturn));
 
            view.Expect(v => v.Products = productsToReturn);
            view.Expect(v => v.DataBind());
 
            mocks.ReplayAll();
            CreateController().Search(productPattern, categoryId, supplierId);
 
            view.VerifyAllExpectations();
            var request = spy.GetRequest<GetProductOverviewsRequest>();
            Assert.AreEqual(productPattern, request.NamePattern);
            Assert.AreEqual(categoryId, request.CategoryId);
            Assert.AreEqual(supplierId, request.SupplierId);
        }

s3.cs

        public void Search(string name, int? productCategoryId, int? supplierId)
        {
            var response = service.GetProductOverviews(
                new GetProductOverviewsRequest(name, productCategoryId, supplierId));
            View.Products = response.Products;
            View.DataBind();
        }

s4.cs

        [Test]
        public void NavigatesToEditProductScreenWhenEditProductIsTriggered()
        {
            const int productId = 5;
 
            navigator.Expect(n => n.GoToEdit(productId));
 
            mocks.ReplayAll();
            CreateController().EditProduct(productId);
            navigator.VerifyAllExpectations();
        }

s5.cs

        public void EditProduct(int productId)
        {
            navigator.GoToEdit(productId);  
        }

s6.cs

    public abstract class NorthwindPage<T> : Page where T : IController
    {
        protected NorthwindPage()
        {
            Controller = CreateController();
        }
 
        protected T Controller { get; private set; }
 
        protected abstract T CreateController();
 
        protected override void OnPreRenderComplete(EventArgs e)
        {
            base.OnPreRenderComplete(e);
            Controller.Dispose();
        }
 
        // there are also some small helper methods in here that aren't really
        // relevate to the example so i left them out
    }

s7.cs

    public partial class ProductList : NorthwindPage<ProductListController>, IProductList
    {
        public IEnumerable<ProductCategoryDTO> ProductCategories { get; set; }
        public IEnumerable<ProductOverviewDTO> Products { get; set; }
        public IEnumerable<SupplierDTO> Suppliers { get; set; }
 
        protected void Page_Load(object sender, EventArgs e)
        {
            Controller.Load();
        }
 
        protected override ProductListController CreateController()
        {
            return Container.Resolve<ProductListController>(new { view = this });
        }
 
        protected void SearchButton_Click(object sender, EventArgs e)
        {
            Controller.Search(NameTextBox.Text, GetSelectedId(ProductCategoryList), GetSelectedId(SupplierList));
        }
 
        protected void EditProductLink_Click(object sender, EventArgs e)
        {
            Controller.EditProduct(GetIdForCurrentRow(sender as IButtonControl));
        }
 
        public override void DataBind()
        {
            if (ProductCategories != null && Suppliers != null)
            {
                var categories = new[] { new ProductCategoryDTO { Id = -1, Name = "All" } }.Union(ProductCategories);
                var suppliers = new[] { new SupplierDTO { Id = -1, CompanyName = "All" } }.Union(Suppliers);
                PrepareDropDownList(ProductCategoryList, categories, "Name", "Id");
                PrepareDropDownList(SupplierList, suppliers, "CompanyName", "Id");
            }
 
            if (Products != null)
            {
                ProductsGrid.DataSource = Products;
            }
 
            base.DataBind();
        }
    }