javascript - undefined $scope variable inside function in jasmine test -

i started learn unit test angular apps. , faced problem. can not take scope variable inside executed function. here factory code

angular.module('app').factory('authenticationservice', authenticationservice);   authenticationservice.$inject = ['$http'];   function authenticationservice($http) {     var service = {};      service.login = login;     return service;      function login(data, callback) {       $http({         method: 'post',         url: config.geturl('auth/login'),         data: data       }).then(function (response) {           callback(response);         }, function (error) {           callback(error);         });     } 

part of controller file. yet wan test login function

function authctrl($scope, $location, authenticationservice) {     var vm = this;     vm.login = login;      vm.datalogin = {       user_id: '',       password: '',     };     function login() {       vm.dataloading = true;         authenticationservice.login(vm.datalogin, function (response) {            if (response.status == 200) {             if (response.data.error_code == 'auth.credentials.invalid') {               vm.invalidcredentials = true;             } else {               vm.invalidcredentials = false;               if (response.data.session_state == 'otp_required') {                 vm.usernumber = response.data.user_phone;                 $localstorage['session_token'] = response.data.session_token;                 vm.needform = 'someform';               } else {                 authenticationservice.setcredentials(response.data);                 $state.go('dashboard');               }               vm.dataloading = false;             }           }         });       }     } }); 

and spec.js

describe('authctrl, ', function() {     var $scope, ctrl;     var authsrvmock;       var mockjson = {       user_id: '001',       session_token: 'some_token'     };      var mocklogindata = {       user_id: '0000102',       password: '123456'     };      var mockresponsedata = {       data: {         "session_expires": 1453822506,         "session_state": "otp_required",         "session_token": "tokennnn",         "status": "success",         "user_id": "0000102",         "user_phone": "+7 (xxx) xxx-xx-89"       },       status: 200     };      beforeeach(function () {        authsrvmock = jasmine.createspyobj('authenticationservice', ['login', 'logout']);       module('app');        inject(function ($rootscope, $controller, $q) {         $scope = $rootscope.$new();         authsrvmock.login.and.returnvalue(mockresponsedata);         ctrl = $controller('authctrl', {           $scope: $scope,           authenticationservice: authsrvmock         });       });     });      it('should call login function , pass dashboard', function () {       ctrl.login();       expect(authsrvmock.login).tohavebeencalled();       // until works here fine     });    }); 

but after want test vm.invalidcredentials, if write

expect(ctrl.invalidcredentials).tobe(false) 

i error expected undefined false.

why can't see variables?

bit of noob myself @ jasmine, i'm guessing it's because need promise login() return in jasmine.

look using $q.defer(), or $httpbackend.