Problem with TempData and Faked HttpContext using ASP.NET MVC - asp.net-mvc

Question

I am working with a faked HttpContext (code provided in the end) and probably I am missing something because I can't access TempData collection (forth line of SetFakeControllerContext method). Every time I try I get this error message:
'controller.TempData' threw an exception of type 'System.AccessViolationException'
The code that calls FakeHttpContext is:
public static void SetFakeControllerContext(this Controller controller)
{
HttpContextBase httpContext = FakeHttpContext(string.Empty);
var context = new ControllerContext(new RequestContext(httpContext, new RouteData()), controller);
controller.ControllerContext = context;
controller.TempData = new TempDataDictionary(); //This is not necessary! It was just a test!!!!
}
Does anybody know what I am doing wrong?
public static HttpContextBase FakeHttpContext(string username){
var context = new Mock<HttpContextBase>();
var request = new Mock<HttpRequestBase>();
var response = new Mock<HttpResponseBase>();
var session = new Mock<HttpSessionStateBase>();
var server = new Mock<HttpServerUtilityBase>();
var user = new Mock<IPrincipal>();
var identity = new Mock<IIdentity>();
context.Setup(ctx => ctx.Request).Returns(request.Object);
context.Setup(ctx => ctx.Response).Returns(response.Object);
context.Setup(ctx => ctx.Session).Returns(session.Object);
context.Setup(ctx => ctx.Server).Returns(server.Object);
context.Setup(ctx => ctx.User).Returns(user.Object);
user.Setup(ctx => ctx.Identity).Returns(identity.Object);
if (!string.IsNullOrEmpty(username))
{
identity.Setup(id => id.IsAuthenticated).Returns(true);
identity.Setup(id => id.Name).Returns(username);
}
else
{
identity.Setup(id => id.IsAuthenticated).Returns(false);
identity.Setup(id => id.Name).Returns(string.Empty);
}
context.Setup(ctx => ctx.Response.Cache).Returns(CreateCachePolicy());
return context.Object;
}
P.s.: I am using Moq
UPDATE:
OMG!! I CAN'T BELIEVE IT! More than 2 hours to figure out that the problem was a reference to the wrong MVC dll. I was referencing System.Web.Mvc 2.0 for my main app but System.Web.Mvc 1.0 in another project. Sorry about this!

Answer 1

The problem's definitely somewhere else. You don't even need to initialize the TempData property to a new dictionary in your unit test. The following program works fine:
public class HomeController: Controller
{
public ActionResult Index()
{
TempData["foo"] = "bar";
return View();
}
}
class Program
{
static void Main()
{
var controller = new HomeController();
controller.Index();
Console.WriteLine(controller.TempData["foo"]);
}
}