MVC3 Unit Test Controller with Property Injection

Question

I have a MVC3 project that uses property injection . Within my controllers I make a call to a service class. As I mentioned it uses property injection (with unity ) instead of resolving this through the constructor. I have searched all over trying to find an example of a unit test that resolves these dependencies within my controller but everything seems to refer to constructer DI. I'm getting frustrated. Any help would be great.

Example of Controller:

  [Dependency]
  public ITrainingService trainingService { get; set; } 

  public ActionResult Index(MyTrainingView myTrainingView)
  {
    //Load all training items into view object
    myTrainingView.training = trainingService.getTraining(myTrainingView.trainingId);
    myTrainingView.videos = trainingService.getTrainingVideos(myTrainingView.trainingId);
    myTrainingView.visuals = trainingService.getTrainingVisuals(myTrainingView.trainingId);
    myTrainingView.exams = trainingService.getTrainingExams(myTrainingView.trainingId);

    return View(myTrainingView);
  }

I'm trying to resolve the trainingService when running my unit test. I have found countless examples for mocking and resolving dependencies using constructor dependency but nothing when it comes to property injection.

Answer 1

You don't need to rely on unity in your unit tests.

Something like this would do the trick:

    [Test]
    public void GetTrainingById()
    {
        var mockService = MockRepository.GenerateMock<ITrainingService>();
        mockService.Stub(service => service.getTraining(123)).Return(new ImaginaryClass());

        var sut = new TrainingController();
        sut.trainingService = mockService;

        var myTrainingView = new MyTrainingView();
        sut.Index(myTrainingView);

        Assert.AreEqual(expected, myTrainingView.training);
    }

If you must use unity in your unit tests, you could just instantiate the UnityContainer in your test and use the RegisterInstance to register the objects you want to inject.