angularjs – 错误：超时 – 在指定的超时期间未调用异步回调…

angular.module('triggerTips')
       .service('userData',function ($rootScope,$http,$log,$firebase) {

    this._log = {
        service : 'userData'
    };

    // Synchronized objects storing the user data
    var config;
    var userState;

    // Loads the user data from firebase
    this.init = function(readyCallback) {
        var log = angular.extend({},this._log);
        log.funct = 'init';

        var fireRef = new Firebase('https://XYZfirebaseio.com/' + $rootScope.clientName);
       config = $firebase(fireRef.child('config')).$asObject();
       userState = $firebase(fireRef.child('userState').child($rootScope.userName)).$asObject();

  Promise.all([config.$loaded(),userState.$loaded()]).
    then(
      function() {
        if(config == null || Object.keys(config).length < 4) {
          log.message = 'Invalid config';
          $log.error(log);
          return;
        }

        if(!userState.userProperties) {
          userState.userProperties = {};
        }

        if(!userState.contentProperties) {
          userState.contentProperties = {};
        } 

        log.message = 'User Properties: ' + JSON.stringify(userState.userProperties);
        $log.debug(log);

        log.message = 'Content Properties: ' + JSON.stringify(userState.contentProperties);
        $log.debug(log);

        log.message = 'Loaded user data from firebase';
        $log.debug(log);
        readyCallback();
      },function() {
        log.message = 'Unable to load user data from firebase';
        $log.error(log);
      }
    );
};

// Returns the initial tip configuration
this.getConfig = function() {
  return config;
};

// Set the value of a user property
// A user property is something about the user himself
this.setUserProperty = function(property,value) {
  if(!userState.userProperties) {
    userState.userProperties = {};
  }
  userState.userProperties[property] = value;
  userState.$save();
  $rootScope.$broadcast('user-property-change',property);
};

// Get the value of a user property
this.getUserProperty = function(property) {
  if(userState.userProperties) {
    return userState.userProperties[property];
  }
};

// Set the value of a user content property
// A content property is something about a particular peice of content for a particular user
this.setContentProperty = function(contentName,property,value) {
  if(!userState.contentProperties[contentName]) {
    userState.contentProperties[contentName] = {};
  }

  userState.contentProperties[contentName][property] = value;
  userState.$save();
  $rootScope.$broadcast('content-property-change',contentName,property);
};

// Increment a count property on the user state for a given tip
this.incrementContentProperty = function(contentName,property) {
  if(!userState.contentProperties[contentName]) {
    userState.contentProperties[contentName] = {};
  }
  if(!userState.contentProperties[contentName][property]) {
    userState.contentProperties[contentName][property] = 0;
  }

  userState.contentProperties[contentName][property]++;
  userState.$save();
  $rootScope.$broadcast('content-property-change',property);
};

// Returns the user state for a given tip and property
this.getContentProperty = function(contentName,property) {
  if(userState.contentProperties) {
    var t = userState.contentProperties[contentName];
    if(t) {
      return t[property];
    }
  }
};
});

我试图用茉莉花单元测试这个服务：

我的单位测试是：

'use strict';

describe('Service: userData',function () {

  // load the service's module
  beforeEach(function() {
    module('triggerTips');
  });

  // instantiate service
  var userData;
  beforeEach(inject(function (_userData_) {
    userData = _userData_;
  }));

  it('should load correctly',function () {
    expect(!!userData).toBe(true);
  });

  describe('after being initialized',function () {

    beforeEach(function(done) {
      // Unable to get this working because the callback is never called
        userData.init(function() {
            done();
        });
        jasmine.DEFAULT_TIMEOUT_INTERVAL = 2000;
    });

    it('should have a valid config',function (done) {
         setTimeout(function() {
             expect(Object.keys(userData.getConfig()).length == 0);
             done();
           },1500);}); }); });

我阅读了关于Jasmine的异步支持,但是由于我相当新的使用JavaScript的单元测试无法使其工作.

我收到一个错误：

Async callback was not invoked within timeout specified by
jasmine.DEFAULT_TIMEOUT_INTERVAL

有人可以帮我提供我的代码的工作示例一些解释吗？