Is there a way to unit test ASP.NET MVC ViewBag properties set in the view?

Question

Say I have a view with the following code at the top of the page:

@{     ViewBag.Title = "About Us";     Layout = "~/Views/Shared/_Layout.cshtml"; } 

And I have a controller method:

    public ActionResult About()     {         return View();     } 

How can I test that the ViewBag was set properly?

I have tried the following code.

[TestCase] public void About() {     var controller = new AboutController();     var ar = controller.About() as ViewResult;     Assert.AreEqual("About Us", ar.ViewBag.Title); } 

But I get the following result when I run the test:

Tests.Controllers.AboutControllerTests.About():     Expected: "About Us"     But was: null 

Answer 1

Since both the ViewData and ViewBag use the same storage pattern, you should be able to use ViewData[yourKey] in your tests.

So your test will look like this:

[TestCase] public void About() {     var controller = new AboutController();     var ar = controller.About() as ViewResult;     Assert.AreEqual("About Us", ar.ViewData["Title"]); } 

Answer 2

Have you tried

Assert.AreEqual("About Us", controller.ViewBag.Title); 

It works for me