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

Question

我有一个 angular 服务 class : -

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 进行单元测试还比较陌生，无法使其正常工作。

我收到一条错误消息：

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和一些解释吗？

Answer 1

我建议您将 setTimeout 替换为 $timeout 以加速您的规范套件。您将需要 ngMock 成为您的规范套件的一部分才能使其按预期方式工作，但这似乎已经在查看您的规范时得到了注意。好东西。

然后为了使规范的异步性质 "go away" 你会调用：

$timeout.flush([delay]) 其中 delay 是可选的。

如果没有延迟，所有挂起的异步任务（在 angular 世界中）将完成它们正在做的事情。
如果经过延迟，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人将保持 'pending' 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);
  });
});

您使用什么 Promise 实现？我看到对 Promise.all 的调用，但为了继续我的回答，我将假设它等同于 $q.all。运行 $timeout.flush 应该负责解析这些值。

如果你想在 Jasmine 中写下对 rejected/resolved promise 值的期望，我会研究类似 jasmine-promise-matchers 的东西，让它变得干净漂亮，但除非你可以做一些事情像这样：

// $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存根 out/spy（取决于您的 spy 的框架定义）与您的承诺相关的承诺本地 config 变量，但我认为这完全是另一个故事。

我一点都不熟悉 $firebase(something).$asObject.$loaded - 因此我可能在这里遗漏了一些东西，但假设它有效 'just like any other promise' 你应该是很好。

jsfiddle

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

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

unit-testing

asynchronous

jasmine

angularjs