vb net code 128 barcode generator Adding the rel attribute to the Products link in .NET framework

Making Code 128B in .NET framework Adding the rel attribute to the Products link

Listing 20.4 Adding the rel attribute to the Products link
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<ul id="menu"> <li><%= Html.ActionLink("Home", "Index", "Home")%></li> <li><%= Html.ActionLink("Products", "Index", "Product", null, new { rel = LocalSiteMap.Nav.Products })%> </li> <li><%= Html.ActionLink("About", "About", "Home")%></li> </ul>
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The Products link now supplies an additional parameter to the ActionLink method to render the rel attribute, in the form of an anonymous type B. The LocalSiteMap
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Full system testing
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class is a static class exposing a simple navigational structure through constants, as shown in listing 20.5.
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Listing 20.5 The LocalSiteMap class
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public static class LocalSiteMap { public static class Nav { public static readonly string Products = "products"; }
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We can mimic the hierarchical structure of our site through nested static classes. Individual areas of concern, such as navigation, are placed inside inner static classes B. Finally, we can define constants to represent navigational elements C. We don t want to fall into the same trap of hard-coding rel values in our test and view, so we create a simple constant that can be shared between our test code and view code. This allows the rel value to change without breaking our test, as shown in listing 20.6.
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Listing 20.6 The UI test using a helper method to navigate links
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[TestFixture] public class ProductEditTester : WebTestBase { [Test] public void Should_update_product_price_successfully() { NavigateLink(LocalSiteMap.Nav.Products); } }
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The NavigateLink method is a helper method wrapping the work of finding a link with the rel attribute and clicking it. The definition of this method is shown in listing 20.7.
Listing 20.7 The NavigateLink method in our WebTestBase class
protected virtual void NavigateLink(string rel) { var link = Browser.Link(Find.By("rel", rel)); link.Click(); }
By encapsulating the different calls to the IE browser object in more meaningful method names, we make our UI test easier to read, author, and understand. Because both our view and our test share the same abstraction of representing navigational structure, we strengthen the bond between code and test. This strengthening lessens
Interacting with forms
the chance of our UI tests breaking because of orthogonal changes that shouldn t affect the semantic behavior of our tests. Our test is merely attempting to follow the Products link, so it shouldn t fail if the semantics of the Products link don t change. In the next few sections, we ll continue this theme of enforcing a connection between test and UI code, moving away from black-box testing.
20.3 Interacting with forms
In this book, we eschewed the value of embracing strongly typed views and expressionbased HTML helpers. This allowed us to take advantage of modern refactoring tools that can update our view code automatically in the case of member name changes. Why then revert to hard-coded magic strings in our UI tests For example, our edit view already takes advantage of strongly typed views in displaying the edit page, as shown in listing 20.8.
Listing 20.8 The strongly typed view using editor templates
<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<ProductForm>" %> <%@ Import Namespace="UITesting.Models" %> <asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server"> Edit </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"> <h2>Edit Product</h2> Creates <% using(Html.BeginForm()) { %> edit form <%= Html.EditorForModel() %> <input type="submit" value="Save" /> <% } %> </asp:Content>
Declares strongly typed view
Our edit view is a strongly typed view for a ProductForm view model type B. We use the editor templates feature from ASP.NET MVC 2 C to remove the need to hand-code the individual input and label elements. The EditorForModel method also lets us change the name of any of our ProductForm members without breaking our view or controller action. In our UI test, we can take advantage of strongly typed views by using a similar approach with expression-based helpers, as shown in listing 20.9.
Listing 20.9 Using a fluent API and expression-based syntax to fill out forms
[Test] public void Should_update_product_price_successfully() { NavigateLink(LocalSiteMap.Nav.Products); Browser.Link(Find.ByText("Edit")).Click();
Full system testing
ForForm<ProductForm>() .WithTextBox(form => form.Price, 389.99m) .Save();
Uses expressionbased helper
This simple fluent interface starts by specifying the view model type by calling the ForForm method B. The ForForm method builds a FluentForm object, which we ll examine shortly. Next, a call to the WithTextBox method is chained to the result of the ForForm method and accepts an expression used to specify a property on the ViewModel, as well as a value to fill in the input element. Finally, the Save method clicks the Save button on the form. Let s examine what happens behind the scenes, first with the ForForm method call, shown in listing 20.10.
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