I have the following class with the following members:

public class RegistrationPresenter : EPiPresenter<IRegistrationView, LoginPage>, IDisposable
    private readonly static string[] DefaultUserRoles = { AppRoles.RegisteredRole, AppRoles.EveryoneRole, AppRoles.ManagerUserRole };

    private readonly INavigator navigator;
    private readonly ISpanishProvincesHelper spanishProvincesHelper;
    private readonly IContentHelper contentHelper;
    private readonly IUserDataHelper userDataHelper;

    public RegistrationPresenter(IRegistrationView view, LoginPage page, INavigator navigator, 
        ISpanishProvincesHelper spanishProvincesHelper, IContentHelper contentHelper, IUserDataHelper userDataHelper)
        : base(view, page)

I'm successfully able to Bind all the readonly members with an IoC container (Ninject in my case), except for the static string[], which I don't know how to do it. Which approach should I choose or how could I apply IoC to the DefaultUserRoles values, so I'm able to mock it when Unit testing?

  • 3
    Why do you need to inject constants? Commented Mar 28, 2014 at 14:09
  • 1
    Yes, if you need to inject some other value then they're not constants.
    – david.pfx
    Commented Mar 28, 2014 at 14:21

1 Answer 1


1) are you sure you need to mock your constant?

2) Use Microsoft Fakes, which will happily replace your string with a different one at test-time (an approach that works beautifully when testing more real-world problems, such as mocking the current date/time)

(of course, if you use Fakes, you wouldn't have needed to bother with ninject :) )

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