Unit testing config routes with Angular

What is the best practice for testing the config block for an angular module?

Do you unit test the config/run blocks? Or is it better to write e2e tests for testing routes?

   angular.module('example')
    .config(['$stateProvider', '$urlRouterProvider',
      function($stateProvider, $urlRouterProvider) {

        $stateProvider
          .state('root', {
            abstract: true,
            views: {
              '': {
                templateProvider: function($templateCache) {
                  return $templateCache.get('views/root.html');
                }
              }
            }
          })
          .state('login', {
            url: '/login',
            parent: 'root',
            data: {
              title: 'Login',
              requiresLogin: false,
            },
            views: {
              'login': {
                controller: 'LoginCtrl as login',
                templateProvider: function($templateCache) {
                  return $templateCache.get('views/login.html');
                }
              }
            }
          });

      }
    ]);