Custom route testing in MVC 5.

routeconfig.cs

public class RouteConfig
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.MapRoute(
                name: "BlogArticle",
                url: "{controller}/{year}/{month}/{name}",
                defaults: new { controller = "blog", action = "Index", year = UrlParameter.Optional, month = UrlParameter.Optional, name = UrlParameter.Optional }
            );

        }
    }

RoutingTests.cs

    [TestClass]
    public class RoutingTests
    {
        /// <summary>
        /// unit testing custom route
        /// </summary>
        [TestMethod]
        public void TestingCustomRouteToBindBlogArticle()
        {
            var context = new StubHttpContextForRouting(requestUrl: "~/blog/2014/01/Powershell");
            var routes = new RouteCollection();
            RouteConfig.RegisterRoutes(routes);

            // Act
            RouteData routeData = routes.GetRouteData(context);

            // Assert
            Assert.IsNotNull(routeData);
            Assert.AreEqual("blog", routeData.Values["controller"]);
            Assert.AreEqual("Index", routeData.Values["action"]);
            Assert.AreEqual("2014", routeData.Values["year"]);
            Assert.AreEqual("01", routeData.Values["month"]);
            Assert.AreEqual("Powershell", routeData.Values["name"]);
        }
    }


/// Source for this helper class: http://bradwilson.typepad.com/blog/2010/07/testing-routing-and-url-generation-in-aspnet-mvc.html
    public class StubHttpContextForRouting : HttpContextBase
    {
        StubHttpRequestForRouting _request;
        StubHttpResponseForRouting _response;

        public StubHttpContextForRouting(string appPath = "/", string requestUrl = "~/")
        {
            _request = new StubHttpRequestForRouting(appPath, requestUrl);
            _response = new StubHttpResponseForRouting();
        }

        public override HttpRequestBase Request
        {
            get { return _request; }
        }

        public override HttpResponseBase Response
        {
            get { return _response; }
        }
    }

    public class StubHttpRequestForRouting : HttpRequestBase
    {
        string _appPath;
        string _requestUrl;

        public StubHttpRequestForRouting(string appPath, string requestUrl)
        {
            _appPath = appPath;
            _requestUrl = requestUrl;
        }

        public override string ApplicationPath
        {
            get { return _appPath; }
        }

        public override string AppRelativeCurrentExecutionFilePath
        {
            get { return _requestUrl; }
        }

        public override string PathInfo
        {
            get { return ""; }
        }

        public override NameValueCollection ServerVariables
        {
            get { return new NameValueCollection(); }
        }
    }

    public class StubHttpResponseForRouting : HttpResponseBase
    {
        public override string ApplyAppPathModifier(string virtualPath)
        {
            return virtualPath;
        }
    }