MOQing a controller in MVC

Question

I have the following controller

 public class ProviderController : Controller
{
    private static readonly IProviderRepository _repository = new ProviderRepository();
    private static readonly Ilogger Logger = new Logger();     

    [HttpPost]
    public ActionResult CreateProvider(Provider provider)
    {
        try
        {
            int providerCreationSuccessful = _repository.CreateProvider(provider);
            if (providerCreationSuccessful == 1)
                TempData["userIntimation"] = "Provider Registered Successfully";

            return RedirectToAction("ShowTheListOfProviders");
        }
        catch (Exception Ex)
        {
            Logger.Error(Ex.Message);
            return View("Error");
        }
    }
 }

The IProviderRepository looks like this.

public interface IProviderRepository
{
    List<Provider> GetListofProviders();

    Provider GetSingleProviderDetails(int ProviderID);

    int CreateProvider(Provider provider);

    int DeleteProvider(int ProviderID);

    int UpdateProviderDetails(Provider provider);
}

I have to MOQ the controller apparently.I am guessing that means I ahve to MPOQ the methods.So,I created a test project with the following method.

 public class ProviderControllerTests
{
    Provider _provider;
    Mock<IProviderRepository> mockProviderRepository;

    [TestInitialize]
    public void InitializeTestData()
    {
        _provider = new Provider();
        mockProviderRepository = new Mock<IProviderRepository>();
    }
  [TestMethod()]
    public void repository_CreateProviderTest()
    {
        //Act
        mockProviderRepository.Setup(provider => provider.CreateProvider(_provider)).Returns(1);
        //Assert
        throw new NotImplementedException();
    }
}

Could some one guide me on what exactly I need to mock here.I feel like I am a little in over my head.

Answer 1

You need to mock IProviderRepository which you have done.

mockProviderRepository = new Mock<IProviderRepository>();

In order not to interact with the real database you have to the following

[TestInitialize]
    public void InitializeTestData()
    {
        _provider = new Provider();
        mockProviderRepository = new Mock<IProviderRepository>();
        _provider._repository=mockProviderRepository.Object;

    }

So you can now test your Actions of the ProviderController using this mocked repository.

[TestMethod()]
    public void repository_CreateProviderTest()
    {
        //Act
        mockProviderRepository.Setup(provider => provider.CreateProvider(_provider)).Returns(1);
        Provider provider = new Provider() {//with data};
       _provider.CreateProvider(Provider provider);
       //Your Assertion

}