Question

I want to unit test the following ASP.NET MVC controller Index action. What do I replace the actual parameter in the assert below (stubbed with ?).

using System.Web.Mvc;
namespace MvcApplication1.Controllers
{
    public class StatusController : Controller
    {
        public ActionResult Index()
        {
            return Content("Hello World!");
        }
    }
}


[TestMethod]
public void TestMethod1()
{
    // Arrange
    var controller = CreateStatusController();

    // Act
    var result = controller.Index();

    // Assert
    Assert.AreEqual( "Hello World!.", ? );
}

Answer 1

use the “as” operator to make a nullable cast. Then simply check for a null result

[TestMethod]
public void TestMethod1()
{
    // Arrange
    var controller = CreateStatusController();

    // Act
    var result = controller.Index() as ContentResult;

    // Assert
    Assert.NotNull(result);
    Assert.AreEqual( "Hello World!.", result.Content);
}