Unit Test DisplayFormat attribute HtmlHelper

    Previously, I wrote about how to mock a ViewEngine for one of my unit tests. Today, I came across a question on StackOverflow asking about how to unit test the out put of DataAnnotation attribute DisplayFormat. I'm very interested in Unit Test so I decide to find the answer, another reason is to increase my reputation on StackOverflow :D. Honestly, I don't exactly know the reason why to test the output...

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Save some lines for your Razor view

We all know that we should not put logic in the MVC view. If we have to do something base on a complex condition, we should better make a HtmlHelper method for that logic. In an attempt to remove some simple if/else statement on the view by using some extention method. Let's say we have something like below in the view: @if (!Request.IsAuthenticated) { Html.RenderPartial("LoginBox"); } I attempt to make it look like:   @{...

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How to mock UrlHelper?

Sometime, you need to write unit test for an action method that needs a UrlHelper. But I'm sure you will never can mock that stuff since it's a concrete class and it's methods are not virtual. Let's say we have following action method and want to test it: [Authorize] public ActionResult LogOnAs(Guid userId, string returnUrl) { // Logic to login user by Id ... if (Url.IsLocalUrl(returnUrl)) { return Redirect(returnUrl); ...

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Never give a chance to make something wrong

Recectly, I've penetrated the truth that if you don't want others do something (bad), never ever give them a chance to do that. It's true in both my real life and in programming. Since my blog is just about software programming, I would like to write about some funny mistakes that people often make. Well, I did make some of them in the past :D 1/ You may forget about the ability of the constructor. Let's look at following code: public...

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