angularjs - 错误 : Timeout - Async callback was not invoked within timeout specified. ... .DEFAULT_TIMEOUT_INTERVAL

Question

我有一个 angular.service 类:-

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', contentName, 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];
    }
  }
};
});

我正在尝试使用 jasmine 对该服务进行单元测试:-

我的单元测试是:-

    '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 Jasmine 中的异步支持，但由于我对使用 JavaScript 进行单元测试比较陌生，因此无法使其工作。

我收到一个错误:

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

有人可以帮我提供一些解释的代码的工作示例吗？

Answer 1

我建议你更换 setTimeout与 $timeout以加快您的规范套件。您将需要 ngMock成为您的规范套件的一部分，以使它按预期方式工作，但这似乎已经在查看您的规范时得到了照顾。好东西。

然后为了使规范的异步性质“消失”，您可以调用:

$timeout.flush([delay])哪里delay是可选的。

如果没有延迟，所有挂起的异步任务(在 angular 世界内)将完成他们正在做的事情。

如果延迟过去，则指定延迟内的所有待处理任务都将完成。那些在指定延迟之外的将保持“待处理”状态。

有了这个，您可以删除 done回调并编写您的测试:

describe('after being initialized', function () {
  var $timeout;

  beforeEach(function () {
    // Unable to get this working because the callback is never called
    userData.init();

    inject(function ($injector) {
      $timeout = $injector.get('$timeout');
    });
  }));

  it('should have a valid config', function () {
    $timeout.flush();
    // callback should've been called now that we flushed().
    expect(Object.keys(userData.getConfig()).length).toEqual(0);
  });
});

什么 Promise你在使用实现吗？我看到一个电话给 Promise.all但为了继续我的回答，我要去 假设 它相当于 $q.all .运行 $timeout.flush应该注意解决这些值。

如果你想对 Jasmine 中 promise 的被拒绝/已解决的值写期望值，我会研究类似 jasmine-promise-matchers 的内容。让它干净漂亮，但除非你可以做这样的事情:

// $q
function get () {
  var p1 = $timeout(function () { return 'x'; }, 250);
  var p2 = $timeout(function () { return 'y'; }, 2500); 

  return $q.all([p1, p2]);
}

// expectation
it('is correct', function () {
  var res; 

  get().then(function (r) {
    res = r;
  });

  $timeout.flush(2500);

  expect(res).toEqual(['x', 'y']);
});

根据您的设置，您可能需要也可能不需要删除/监视(取决于您的框架对 spy 的定义)与本地相关的 promise config变量，但我认为这完全是另一个故事。

我对 $firebase(something).$asObject.$loaded 一点都不熟悉——因此我可能在这里错过了一些东西，但假设它像任何其他 promise 一样有效，你应该很高兴。

jsfiddle