asp.net mvc - ASP/NET MVC: Test Controllers w/Sessions? Mocking?

Question

I read some of the answers on here re: testing views and controllers, and mocking, but I still can't figure out how to test an ASP.NET MVC controller that reads and sets Session values (or any other context based variables.) How do I provide a (Session) context for my test methods? Is mocking the answer? Anybody have examples? Basically, I'd like to fake a session before I call the controller method and have the controller use that session. Any ideas?

Answer 1

Check out Stephen Walther's post on Faking the Controller Context:

ASP.NET MVC Tip #12 – Faking the Controller Context

[TestMethod]
public void TestSessionState()
{
    // Create controller
    var controller = new HomeController();


    // Create fake Controller Context
    var sessionItems = new SessionStateItemCollection();
    sessionItems["item1"] = "wow!";
    controller.ControllerContext = new FakeControllerContext(controller, sessionItems);
    var result = controller.TestSession() as ViewResult;


    // Assert
    Assert.AreEqual("wow!", result.ViewData["item1"]);

    // Assert
    Assert.AreEqual("cool!", controller.HttpContext.Session["item2"]);
}