javascript 使用 $resource 时，量角器超时等待与页面同步

Protractor times out waiting for sync with page when using $resource

提问by Joseph S.

I'm testing Protractor with a small AngularJS app.

我正在使用一个小型 AngularJS 应用程序测试量角器。

This is the test:

这是测试：

describe('Testing Protractor', function() {
  var draftList;

  it('should count the number of drafts', function() {
    browser.get('#/');
    draftList = element.all(by.repeater('newsletter in drafts'));
    expect(draftList.count()).toEqual(2);
  });
});

Controller:

控制器：

angular.module('myApp.controllers', []).
  controller('DraftsCtrl', ['$scope', 'Draft', function($scope, Draft) {
    $scope.drafts = Draft.query();
}])

Draft service:

草稿服务：

angular.module('myApp.services', ['ngResource']).
  factory('Draft', ['$resource',
    function($resource) {
      return $resource('api/drafts/:id')
    }])

Running this test using Protractor results in the following error:

使用 Protractor 运行此测试会导致以下错误：

Error: Timed out waiting for Protractor to synchronize with the page after 11 seconds

However, if in the controller I change this line:

但是，如果在控制器中我更改了这一行：

$scope.drafts = Draft.query();

to this:

对此：

$scope.drafts = [];

The test fails as expected, but more importantly: it does not time out.

测试按预期失败，但更重要的是：它不会超时。

With query() enabled, both when running the app manually in a browser and when looking at the browser window opened by Protractor, the data returned by the API is correctly displayed by a repeater.

启用 query() 后，无论是在浏览器中手动运行应用程序还是查看 Protractor 打开的浏览器窗口时，API 返回的数据都会被转发器正确显示。

Why is Protractor not able to synchronize with the page when the service is communicating with the API?

为什么在服务与 API 通信时 Protractor 无法与页面同步？

AngularJS is v1.2.0-rc3. Protractor is v0.12.0.

AngularJS 是 v1.2.0-rc3。量角器是 v0.12.0。

回答by Harri Siirak

This is a known issue, but there is a temporary workaround. Set ptor.ignoreSynchronization = true.

这是一个已知问题，但有一个临时解决方法。设置ptor.ignoreSynchronization = true。

For example:

例如：

describe('Testing Protractor', function() {
  var draftList;
  var ptor;

  beforeEach(function() {
    ptor = protractor.getInstance();
    ptor.ignoreSynchronization = true;
  });

  it('should count the number of drafts', function() {
    ptor.get('#/');
    draftList = element.all(by.repeater('newsletter in drafts'));
    expect(draftList.count()).toEqual(2);
  });
});

回答by Lokesh

browser.ignoreSynchronization = true;worked out for me.

browser.ignoreSynchronization = true;对我来说有效。

回答by Stevo

I'm using Protractor 3.3.0 and to get this to work in my test I had to defer the ignore synchronisation until after I had done the setup.

我正在使用 Protractor 3.3.0，为了让它在我的测试中工作，我不得不推迟忽略同步，直到我完成设置之后。

So in my beforeEach I call my action:

所以在我的 beforeEach 中，我呼吁我的行动：

var searchBox = element(by.css('#inpt_search'));
searchBox.sendKeys('test');

I then have to wait for the mock backend to populate the view (I'm not happy about these sleepcalls so if anyone has a better way of doing this please comment, I can't get expectedConditions.presenceOfto work as it's part of the same bug) using browser.sleep(500). Then in the test I set browser.ignoreSynchronization = truewhich unblocks whatever is blocked and sees the browser content.

然后我必须等待模拟后端填充视图（我对这些sleep调用不满意，所以如果有人有更好的方法请发表评论，我无法开始expectedConditions.presenceOf工作，因为它是同一错误的一部分）使用browser.sleep(500). 然后在测试中我设置browser.ignoreSynchronization = true了解除阻止任何被阻止的内容并查看浏览器内容。

describe('standard search', function (){
    beforeEach(function (){
        openApp();
        var searchBox = element(by.css('#inpt_search'));
        searchBox.sendKeys('test');
        browser.sleep(500);
    });
    it('should work or summat', function () {
        browser.ignoreSynchronization = true;
        var fileItems = element.all(by.repeater('item in list'));
        expect(fileItems.count()).toEqual(50);
    });
});

回答by Peter Parker

Instead of using browser.ignoreSynchronization, use browser.waitForAngularEnabled(*boolean*). browser.waitForAngularEnabled(false)sets browser.ignoreSynchronizationto true, browser.waitForAngularEnabled(true)sets browser.ignoreSynchronizationto false.

而不是使用browser.ignoreSynchronization，使用browser.waitForAngularEnabled(*boolean*)。browser.waitForAngularEnabled(false)设置browser.ignoreSynchronization为true，browser.waitForAngularEnabled(true)设置browser.ignoreSynchronization为false。

you can also include this as part of your test suites' config file:

您还可以将其包含在测试套件的配置文件中：

onPrepare: function () {
    'use strict';
    browser.waitForAngularEnabled(false);
}