Testing UrlHelper.Route

UrlHelperTest.cs

//This is test setup
var mockTeamFoundationFeatureAvailabilityService = new Mock<ITeamFoundationFeatureAvailabilityService>();
var testable = new ApiFeatureAvailabilityController(x => mockTeamFoundationFeatureAvailabilityService.Object);
var request = new HttpRequestMessage(HttpMethod.Get, "http://localhost:8080/path");
var config = new HttpConfiguration();
config.Routes.MapHttpRoute("FeatureAvailability", "path/{id}", new { Controller = "ApiFeatureAvailability", id = RouteParameter.Optional });
request.Properties[HttpPropertyKeys.HttpConfigurationKey] = config;
request.Properties[HttpPropertyKeys.HttpRouteDataKey] = config.Routes.GetRouteData(request);
testable.Url = new UrlHelper(request);
testable.Request = request;

//line being tested
return service.GetFeatureInformation(RequestContext).Select(x => new FeatureFlag(x.Name, x.Description, baseUri + Url.Route("FeatureAvailability", new { id = x.Name }), x.AvailabilityState.ToString()));