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copied!<p>You need to fake HttpContextBase and pass this to an UrlHelper which you can use in a thread without an HttpContext. Here is the rough idea, although you will need to create a class around it etc, this is a quick proof of concept as unit tests don't have an HttpContext either.</p> <pre><code>[TestFixture] public class RouteTestClass { private UrlHelper helper; public RouteTestClass() { MvcApplication.RegisterRoutes(RouteTable.Routes); //You dont need to do this if its done in global.asax! var c = new RequestContext(new FakeContext(), new RouteData()); helper = new UrlHelper(c, RouteTable.Routes); } [Test] public void TestGetHomeIndex() { var url = helper.Action("Index", "Home"); Assert.AreEqual("/",url); } } public class FakeContext : HttpContextBase { public override HttpRequestBase Request { get { return new FakeRequest(); } } public override HttpResponseBase Response { get { return new FakeResponse(); } } } public class FakeRequest : HttpRequestBase { public override string ApplicationPath { get { return "/"; } } public override NameValueCollection ServerVariables { get { return new NameValueCollection(); } } } public class FakeResponse : HttpResponseBase { public override string ApplyAppPathModifier(string virtualPath) { return virtualPath; } } </code></pre> <p><strong>Edit</strong></p> <p>Looking at <a href="https://stackoverflow.com/questions/2031995/call-urlhelper-in-models-in-asp-net-mvc/2032257#2032257">this</a> answer, I tidied the code up a little as I don't need to create fakes for HttpRequestBase and HttpResponseBase myself.</p> <pre><code>[TestFixture] public class RouteTestClass { private UrlHelper helper; public RouteTestClass() { MvcApplication.RegisterRoutes(RouteTable.Routes); var req = new HttpRequest("/", "http://www.yoururl.com", ""); var resp = new HttpResponse(new StringWriter()); var httpContext = new HttpContext(req, resp); var c = new RequestContext(new HttpContextWrapper(httpContext), new RouteData()); helper = new UrlHelper(c, RouteTable.Routes); } [Test] public void TestGetHomeIndex() { var url = helper.Action("Index", "Home"); Assert.AreEqual("/",url); } } </code></pre>

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