Mocking User.Identity in ASP.NET MVC

Question

I need to create Unit Tests for an ASP.NET MVC 2.0 web site. The site uses Windows Authentication.

I\'ve been reading up on the necessity to mock the HTTP context

Answer 1

Example for mocking username and SID on MVC4. The username and SID (Windows Authentication) in the following action should be tested:

[Authorize]
public class UserController : Controller
{
    public ActionResult Index()
    {
        // get Username
        ViewBag.Username = User.Identity.Name;

        // get SID
        var lIdentity = HttpContext.User.Identity as WindowsIdentity;
        ViewBag.Sid = lIdentity.User.ToString();

        return View();
    }
}

I use Moq and Visual Studio Test Tools. The test is implemented as follows:

[TestMethod]
public void IndexTest()
{
    // Arrange
    var myController = new UserController();
    var contextMock = new Mock();
    var httpContextMock = new Mock();
    var lWindowsIdentity = new WindowsIdentity("Administrator");

    httpContextMock.Setup(x => x.User).Returns(new WindowsPrincipal(lWindowsIdentity));

    contextMock.Setup(ctx => ctx.HttpContext).Returns(httpContextMock.Object);
    myController.ControllerContext = contextMock.Object;

    // Act
    var lResult = myController.Index() as ViewResult;

    // Assert
    Assert.IsTrue(lResult.ViewBag.Username == "Administrator");
    Assert.IsTrue(lResult.ViewBag.Sid == "Any SID Pattern");
}