How to mock ModelState.IsValid using the Moq framework?

Question

I\'m checking ModelState.IsValid in my controller action method that creates an Employee like this:

[HttpPost]
public virtual ActionResult Crea         


        

Answer 1

The only issue I have with the solution above is that it doesn't actually test the model if I set attributes. I setup my controller this way.

private HomeController GenerateController(object model)
    {
        HomeController controller = new HomeController()
        {
            RoleService = new MockRoleService(),
            MembershipService = new MockMembershipService()
        };
        MvcMockHelpers.SetFakeAuthenticatedControllerContext(controller);

        // bind errors modelstate to the controller
        var modelBinder = new ModelBindingContext()
        {
            ModelMetadata = ModelMetadataProviders.Current.GetMetadataForType(() => model, model.GetType()),
            ValueProvider = new NameValueCollectionValueProvider(new NameValueCollection(), CultureInfo.InvariantCulture)
        };
        var binder = new DefaultModelBinder().BindModel(new ControllerContext(), modelBinder);
        controller.ModelState.Clear();
        controller.ModelState.Merge(modelBinder.ModelState);
        return controller;
    }

The modelBinder object is the object that test the validity of the model. This way I can just set the values of the object and test it.