Protractor + Selenium Chrome Docker = WebDriverError：未知错误：Chrome 启动失败：正常退出

Question

我已经完成了本教程中的所有内容http://www.protractortest.org/#/tutorial
和
https://github.com/angular/protractor-cookbook/tree/master/protractor-docker

（我最近从单独的 selenium hub 和 node 更改为 https://hub.docker.com/r/selenium/standalone-chrome/）

我创建了一个 protractor.config.js：

exports.config = { 
  framework: 'jasmine', 
  seleniumAddress: 'http://localhost:4455/wd/hub', 
  specs: ['../tests/protractor/spec.js'], 
}

我在 tests/protractor/spec.js 中的测试

// spec.js
describe('Protractor Demo App', function() {
  it('should add one and two', function() {
    browser.get('http://juliemr.github.io/protractor-demo/');
    element(by.model('first')).sendKeys(1);
    element(by.model('second')).sendKeys(2);

    element(by.id('gobutton')).click();

    expect(element(by.binding('latest')).getText()).
        toEqual('5'); // This is wrong!
  });
});

这些是我的 selenium hub 和 chrome 节点：

docker run -d -p 4455:4444 --name selenium-hub selenium/hub:latest
docker run -d --link selenium-hub:hub selenium/node-chrome:latest

提供这些 docker 容器：

806106331d22        selenium/node-chrome:latest   "/opt/bin/entry_point"   23 seconds ago      Up 22 seconds                                        insane_newton
d93265006f9d        selenium/hub:latest           "/opt/bin/entry_point"   37 minutes ago      Up 37 minutes              0.0.0.0:4455->4444/tcp    selenium-hub

这就是正在发生的事情：

./node_modules/.bin/protractor tests/config/protractor.conf.js
[16:01:28] I/launcher - Running 1 instances of WebDriver 
[16:01:28] I/hosted - Using the selenium server at http://localhost:4455/wd/hub

一分钟后我得到这个错误：

[12:32:34] E/launcher - WebDriverError: unknown error: Chrome failed to start: exited normally
  (Driver info: chromedriver=2.30.477691 (6ee44a7247c639c0703f291d320bdf05c1531b57),platform=Linux 4.4.4-200.fc22.x86_64 x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 60.03 seconds
Build info: version: '3.4.0', revision: 'unknown', time: 'unknown'
System info: host: '923fd0282cf0', ip: '172.17.0.27', os.name: 'Linux', os.arch: 'amd64', os.version: '4.4.4-200.fc22.x86_64', java.version: '1.8.0_131'
Driver info: driver.version: ChromeDriver
    at WebDriverError (node_modules/protractor/node_modules/selenium-webdriver/lib/error.js:27:5)
    at Object.checkLegacyResponse (node_modules/protractor/node_modules/selenium-webdriver/lib/error.js:505:15)
    at parseHttpResponse (node_modules/protractor/node_modules/selenium-webdriver/lib/http.js:509:13)
    at doSend.then.response (node_modules/protractor/node_modules/selenium-webdriver/lib/http.js:440:13)
    at process._tickCallback (internal/process/next_tick.js:109:7)
From: Task: WebDriver.createSession()
    at Function.createSession (node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver.js:777:24)
    at Function.createSession (node_modules/protractor/node_modules/selenium-webdriver/chrome.js:709:29)
    at createDriver (node_modules/protractor/node_modules/selenium-webdriver/index.js:167:33)
    at Builder.build (node_modules/protractor/node_modules/selenium-webdriver/index.js:623:16)
    at Hosted.getNewDriver (node_modules/protractor/lib/driverProviders/driverProvider.ts:60:29)
    at Runner.createBrowser (node_modules/protractor/lib/runner.ts:225:39)
    at q.then.then (node_modules/protractor/lib/runner.ts:391:27)
    at _fulfilled (node_modules/protractor/node_modules/q/q.js:834:54)
    at self.promiseDispatch.done (node_modules/protractor/node_modules/q/q.js:863:30)
    at Promise.promise.promiseDispatch (node_modules/protractor/node_modules/q/q.js:796:13)
[12:32:34] E/launcher - Process exited with error code 199

可能是什么原因？

Answer 1

exports.config = {                                                                   
  capabilities: {                                                       
    'browserName': 'chrome'                                             
  },                                                                           
  framework: 'jasmine',                                                                                              
  seleniumAddress: 'http://localhost:4455/wd/hub', 
  specs: ['../tests/protractor/spec.js'],                                                                       
  jasmineNodeOpts: {                                                    
    defaultTimeoutInterval: 30000                                       
  }                                                                     
};                                                                      

Answer 2

请在conf文件和spec文件中添加以下内容，然后运行

   browser.ignoreSynchronization=true;

并在使用 URL 启动浏览器后添加等待时间

   browser.sleep(5000);

并在 Conf 文件中显式添加 Jasmine 默认超时时间间隔和功能

   browserName:"chrome" 

请确保 Conf 和 Spec 文件位于同一位置。