I'm trying to unit test a controller that stuffs data into a ViewData. All our views require similar data (Customer info which is derived from the url). So instead of putting the call into every single controller method, the original developers chose to put this ViewData stuffing into the OnActionExecuting event.

Of course, when you invoke the controller's action from a unit test, OnActionExecuting doesn't fire. (Thanks MVC Team!)

So I tried creating a custom view engine and having it stuff the customer data into the controllerContext when the view is requested. This works fine in a browser, but my viewEngine is ignored when I run this test. No amount of ViewEngines.Add(new funkyViewEngine) has any effect. 

```
  [TestMethod()]
            public void LoginTest()
            {
                ViewEngines.Engines.Clear();
                ViewEngines.Engines.Add(new FunkyViewEngine());

                UserController target = new UserController();
                target.SetStructureMap();  <--sets us to use the test repo

                target.ControllerContext.HttpContext = MVCHelpers.FakeHttpContext("https://customersubdomain.ourdomain.com");  <--moq magic
                var actual = target.Login();
                Assert.IsTrue(actual.GetType().IsAssignableFrom(typeof(System.Web.Mvc.ViewResult)));
                var  vr = actual as ViewResult;
                Assert.IsTrue(vr.ViewData.Community() != null);  <--"Community" should be set by viewengine
                Assert.IsTrue(vr.ViewData.Community().Subdomain == "customersubdomain.ourdomain");
                Assert.IsTrue(vr.ViewData.Community().CanRegister);
            }

```

Is there any hope here? How do I either 1) create a method that gets called on controller execution BOTH in the browser and the unit framework or 2) get the unit framework to invoke my view engine.