How to mock the Request.ServerVariables using MOQ for ASP.NET MVC?

Question

hi guys,

i'm just learning to put in unit testing for my asp.net mvc when i came to learn about the mock and the different frameworks there is out there now.

after checking SO, i found that MOQ seems to be the easiest to pick up. as of now i'm stuck trying to mock the Request.ServerVariables, as after reading this post, i've learned that it's better to abstract them into property.

as such:

/// <summary>
        /// Return the server port
        /// </summary>
        protected string ServerPort
        {
            get
            {
                return Request.ServerVariables.Get("SERVER_PORT");
            }
        }

But i'm having a hard time learning how to properly mock this. I have a home controller ActionResult function which grabs the user server information and proceed to create a form to grab the user's information.

i tried to use hanselman's mvcmockhelpers class but i'm not sure how to use it.

this is what i have so far...

[Test]
        public void Create_Redirects_To_ProductAdded_On_Success() 
        {

            FakeViewEngine engine = new FakeViewEngine();

            HomeController controller = new HomeController();
            controller.ViewEngine = engine;

            MvcMockHelpers.SetFakeControllerContext(controller);

            controller.Create();

            var results = controller.Create();

            var typedResults = results as RedirectToRouteResult;

            Assert.AreEqual("", typedResults.RouteValues["action"], "Wrong action");
            Assert.AreEqual("", typedResults.RouteValues["controller"], "Wrong controller");
        }

Questions:

1. As of now i'm still getting null exception error when i'm running the test. So what am i missing here?
2. And if i use the mvcmockhelpers class, how can i still call the request.verifyall function to ensure all the mocking are properly setup?

Answer 1

so basically i've put in all the references and using this function i was able to get it working. i didn't use mvcmockhelpers class yet as i'm still trying to learn all of this.

and for anyone who's interested to see how i solved this, this is the code that i used.

[Test]
        public void Create_Returns_ViewResult_On_Success() 
        {

            var server = new Mock<HttpServerUtilityBase>(MockBehavior.Loose);
            var response = new Mock<HttpResponseBase>(MockBehavior.Strict);

            var request = new Mock<HttpRequestBase>(MockBehavior.Strict);
            request.Setup(x => x.ApplicationPath).Returns("/");
            request.Setup(x => x.Url).Returns(new Uri("http://localhost"));
            request.Setup(x => x.ServerVariables).Returns(new System.Collections.Specialized.NameValueCollection{
             {"SERVER_NAME","localhost"}, {"SCRIPT_NAME","localhost"}, {"SERVER_PORT","80"}
             , {"HTTPS","www.melaos.com"} , {"REMOTE_ADDR","127.0.0.1"} , {"REMOTE_HOST","127.0.0.1"} 
            });

            var context = new Mock<HttpContextBase>();
            context.SetupGet(x => x.Request).Returns(request.Object);
            context.SetupGet(x => x.Response).Returns(response.Object);
            context.SetupGet(x => x.Server).Returns(server.Object);

            var controller = new HomeController();
            //MvcMockHelpers.SetFakeControllerContext(controller);
            controller.ControllerContext = new ControllerContext(context. Object, new RouteData(), controller);

            var results = controller.Create();

            Assert.IsNotNull(results);
            Assert.IsInstanceOf(typeof(ViewResult), results);
        }