testing routes.cs

[When(@"I get the URL for the route")]
public void Given_I_get_the_URL_for_the_route() {            
    _path = LookupOutboundUrlFrom(_routeData, usingRoutes:MyRoutes(), whileRequestingUrl:_currentPage);
}

static string LookupOutboundUrlFrom(  RouteValueDictionary givenRouteValues = null,
                            object givenRouteData = null,
                            RouteCollection usingRoutes = null, 
                            string whileRequestingUrl = "~/",
                            string applicationPath = "/")
{
    usingRoutes = usingRoutes ?? new RouteCollection();
           
    var context = new Mock<HttpContextBase>();
    var request = new Mock<HttpRequestBase>();
    var response = new Mock<HttpResponseBase>();

    context.Setup(c => c.Request).Returns(request.Object);
    context.Setup(c => c.Response).Returns(response.Object);	        
    request.Setup(c => c.ApplicationPath).Returns(applicationPath);
    request.Setup(x=>x.AppRelativeCurrentExecutionFilePath).Returns(whileRequestingUrl);
    response.Setup(c => c.ApplyAppPathModifier(It.IsAny<string>())).Returns((string s) => s);            

    var requestedRoute = usingRoutes.GetRouteData(context.Object);            
    var defaultRouteData = new RouteData();
    defaultRouteData.Values.Add("controller",requestedRoute.Values["controller"]);
    defaultRouteData.Values.Add("action",requestedRoute.Values["action"]);

    var helper = new UrlHelper(new RequestContext(context.Object,defaultRouteData),usingRoutes);

    return givenRouteData == null 
        ? helper.RouteUrl(givenRouteValues) 
        : helper.RouteUrl(givenRouteData);
}