How do I test for TempData being set in MVC 2 where there is a redirect?

Question

When trying to test my MVC 2 controllers, I am having a hard time testing the result of TempData when I'm doing a redirect. It works ok if the result of the controller action is a ViewResult, however, in a redirect, it is RedirectToRouteResult.

So my test is something like this:

var controller = new SubscriptionController(this.dataStorageMock.Object)
    {
        ControllerContext = MvcMockHelpers.GetControllerContextMock("POST")
    };

var actionResult = controller.Create(formCollection);
var redirectResult = (RedirectToRouteResult)actionResult;

// TODO: Need to ensure TempData contains a key "info".

One option is to do the following:

Assert.That(controller.TempData.ContainsKey("info"));

If the result had been a ViewResult it could have been tested like this:

var viewResult = (ViewResult)actionResult;
Assert.That(viewResult.TempData.ContainsKey("info"));

Is there a way to test RedirectToRouteResult the same way as the ViewResult can be tested?

Thanks

Answer 1

Assert.That(controller.TempData.ContainsKey("info")); is exactly what you need.