ASP.NET MVC 1.0 Test Driven Development: Problem - Design - Solution

5.3. Solution

We start off by creating a new test class — MessageControllerTest — and adding our first test:

[TestFixture]
public class MessageControllerTest
{
    private MessageController controller;
    [SetUp]
    public void SetUp()
    {
        controller = new MessageController();

}

    [Test]
    public void Create_Returns_View()
    {
        ActionResult result = controller.Create();
        result.AssertViewResult(controller, "New Message");
    }
}

In order for the above code to compile, we have to create the MessageController class and add a Create method to it:

public class MessageController : Controller
{
    [AcceptVerbs("get")]
    [Authorize]
    public ActionResult Create()
    {
        ViewData["Title"] = "New Message";
        return View();
    }
}

The next test is as follows:

[Test] public void Create_Returns_Error_If_Name_Is_Missing() { var model = new Message() { Subject = _subject, Name = string.Empty, Text = _text }; var result = controller.Create(model); var errorKey = "name"; var errorMessage = "Name is required"; //assert results Assert.IsNotNull(result); Assert.IsInstanceOfType(typeof(ViewResult), result); controller.ViewData.ModelState.AssertErrorMessage(errorKey, errorMessage); Assert.IsInstanceOfType(typeof(Message), ((ViewResult)result).ViewData.Model); //asser that the ViewData.Model var outModel = (((ViewResult)result).ViewData.Model as Message); Assert.AreEqual(model.Subject, outModel.Subject); Assert.AreEqual(model.Name, outModel.Name); Assert.AreEqual(model.Text, outModel.Text); Assert.AreEqual("Login", controller.ViewData["Title"], ...