Question

I am unit testing my controller.

In one of my controller methods I am setting Session variables:

 public void Index(){
      Session["foo"] = "bar";

      return View();
 }

How can I unit test this? The problem is that the Session property is null when testing. Injecting is not possible because the Session property is readonly.

 [TestMethod]
 public void TestIndex()
     // When
     _controller.Index();

     // Then
     Assert.AreEqual("bar", _controller.Session["foo"])

Answer 1

Personally I like using the MvcContrib TestHelper which mocks all the HTTP pipeline:

[TestMethod]
public void HomeController_Index_Action_Should_Store_Bar_In_Session()
{
    // arrange
    var sut = new HomeController();
    new TestControllerBuilder().InitializeController(sut);

    // act
    sut.Index();

    // assert
    Assert.AreEqual("bar", (string)sut.Session["foo"]);
}