Jasmine - Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL

This is the route:

angular.module('ps.auth')
  .config(function ($stateProvider) {
    $stateProvider.state('login', {
      url: '/login/:username',
      views: {
        'content': {
          templateUrl: 'auth/login.html',
          controller: 'AuthController'
        }
      },
      authNotRequired: true
    })
    .state('logout', {
        url: '/logout',
        controller: 'LogoutCtrl',
        authNotRequired: true
    });
  });



'use strict';
describe('ps.auth', function () {
  var $state, $templateCache, $rootScope, $injector, $location;//, $timeout;

  function mockTemplate(templateRoute, tmpl) {
    $templateCache.put(templateRoute, tmpl || templateRoute);
  }

  function goTo(url) {
    $location.url(url);
    $rootScope.$digest();
  }

  beforeEach(module('ui.router'));

  beforeEach(inject(function (_$state_, _$templateCache_, _$location_, _$rootScope_, _$injector_) {
    $state = _$state_;
    $templateCache = _$templateCache_;
    $location = _$location_;
    $rootScope = _$rootScope_;
    $injector = _$injector_;

  }));

  describe('path', function () {
    function goTo(url) {
      $location.url(url);
      $rootScope.$digest();
    }

    describe('/login', function () {
      beforeEach(mockTemplate.bind(null, 'auth/login.html'));
      // Having the parameter done pass into this function below to avoid
      // for block signature will trigger async behavior
      it('should go to the login state', function (done) {
        goTo('/login');

        // $timeout.flush();
        console.log('****** This is $state.current', $state.current);
        expect($state.current.name).toEqual('login');
        done();
      });
    });

  });
});

Ran the unit test and always got this error message: Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL. Any suggestion how to fix this issue.