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PONeed an advice for unit testing using mock object
 

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    <p>I just recently read about "Mocking objects" for unit testing and currently I'm having a difficulties implementing this approach in my application. Please let me explain my problem.</p> <p>I have a <code>User</code> model class, which is dependent on 2 data sources (database and facebook web service). The controller class simply use this <code>User</code> model as an interface to access data and it doesn't care about where the data came from.</p> <p>Currently I never done any unit test to this <code>User</code> model because it is dependent on an external web service. But just a while ago, I read about object mocking and now I know that it is a common approach to unit test a class that depends on external resources (like in my case).</p> <p>Now I want to create a unit test for the <code>User</code> model, but then I encountered a design issue: In order for the <code>User</code> model to use a mocked Facebook SDK, I have to inject this mocked Facebook SDK to the User object (probably using a setter). Therefore I can't construct the Facebook SDK inside the User object. I have to <strong>construct it outside</strong> the User object, and <strong>inject</strong> the SDK into the User object.</p> <p>The real client of my <code>User</code> model is the application's controller. Therefore I have to construct the Facebook SDK inside the controller and inject it to the user object. Well, this is a problem because I want my controller to be as clean as possible. I want my controller to be ignorant about the application's data source.</p> <p>I'm not good at explaining something systematically, so you'll probably sleeping before reading this last paragraph. But anyway, I want to ask if anyone here ever encountered the same problem as mine? How do you solve this problem?</p> <p>Regards, Andree</p> <p>P.S: I'm using Zend framework, PHP 5.3.</p>
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