org.openqa.selenium.NoSuchSessionException:无法在 docker 容器中使用 Behat/Mink 和 Selenium2Driver 找到 ID 错误测试的会话 [英] org.openqa.selenium.NoSuchSessionException: Unable to find session with ID error testing with Behat/Mink and Selenium2Driver in docker container

问题描述

我正在尝试使用 Behat/Mink 和 Selenium2Driver 以便我也可以测试 Javascript 功能.

I'm trying to test a Symfony3 web application with Behat/Mink and Selenium2Driver so that I can test Javascript functionallity too.

应用程序在 docker 容器中运行，因此我为 selenium-hub 和 chrome 添加了一个新的 docker 容器，如 这里:

The application runs in a docker container, so I added a new docker container for selenium-hub and chrome as described here:

# docker-compose.yml
version: '3.5' # Docker Engine release 17.12.0+

networks:
    servicesnet:
      driver: bridge

services:
   apache:
      build:
         context: './apache2'
      container_name: apache-service
      ports:
         - "80:80"
         - "443:443"
      tty: true
      networks:
         - servicesnet
      volumes:
         - ${HOST_APACHE_CONFIG}:/etc/apache2
         - ${HOST_PAGES_PATH}:/var/www/localhost/htdocs

   selenium-hub:
      image: selenium/hub:4.0.0-alpha-6-20200730
      container_name: selenium-hub
      ports:
         - "4444:4444"
      networks:
         - servicesnet

   chrome:
      image: selenium/node-chrome:4.0.0-alpha-6-20200730
      volumes:
         - /dev/shm:/dev/shm
      depends_on:
         - selenium-hub
      environment:
         - HUB_HOST=selenium-hub
      networks:
         - servicesnet

当我运行 docker-compose up 时，它会为新容器输出:

When I run docker-compose up it outputs for the new containers:

chrome          | 2020-08-12 07:36:19,917 INFO Included extra file "/etc/supervisor/conf.d/selenium.conf" during parsing
chrome          | 2020-08-12 07:36:19,918 INFO supervisord started with pid 7
selenium-hub    | 2020-08-12 07:36:19,297 INFO Included extra file "/etc/supervisor/conf.d/selenium-grid-hub.conf" during parsing
selenium-hub    | 2020-08-12 07:36:19,298 INFO supervisord started with pid 7
selenium-hub    | 2020-08-12 07:36:20,301 INFO spawned: 'selenium-grid-hub' with pid 10
selenium-hub    | Starting Selenium Grid Hub...
selenium-hub    | 2020-08-12 07:36:20,311 INFO success: selenium-grid-hub entered RUNNING state, process has stayed up for > than 0 seconds (startsecs)
selenium-hub    | 07:36:20.588 INFO [LoggingOptions.getTracer] - Using OpenTelemetry for tracing
selenium-hub    | 07:36:20.589 INFO [LoggingOptions.createTracer] - Using OpenTelemetry for tracing
selenium-hub    | 07:36:20.607 INFO [EventBusOptions.createBus] - Creating event bus: org.openqa.selenium.events.zeromq.ZeroMqEventBus
selenium-hub    | 07:36:20.638 INFO [BoundZmqEventBus.<init>] - XPUB binding to [binding to tcp://*:4442, advertising as tcp://172.28.0.3:4442], XSUB binding to [binding to tcp://*:4443, advertising as tcp://172.28.0.3:4443]
selenium-hub    | 07:36:20.676 INFO [UnboundZmqEventBus.<init>] - Connecting to tcp://172.28.0.3:4442 and tcp://172.28.0.3:4443
selenium-hub    | 07:36:20.680 INFO [UnboundZmqEventBus.<init>] - Sockets created
selenium-hub    | 07:36:20.681 INFO [UnboundZmqEventBus.lambda$new$2] - Bus started
chrome          | 2020-08-12 07:36:21,136 INFO success: xvfb entered RUNNING state, process has stayed up for > than 0 seconds (startsecs)
chrome          | 2020-08-12 07:36:21,136 INFO success: fluxbox entered RUNNING state, process has stayed up for > than 0 seconds (startsecs)
chrome          | 2020-08-12 07:36:21,136 INFO success: vnc entered RUNNING state, process has stayed up for > than 0 seconds (startsecs)
chrome          | 2020-08-12 07:36:21,137 INFO success: selenium-node entered RUNNING state, process has stayed up for > than 0 seconds (startsecs)
selenium-hub    | 07:36:21.308 INFO [Hub.execute] - Started Selenium hub 4.0.0-alpha-6 (revision 5f43a29cfc): http://172.28.0.3:4444
chrome          | 07:36:21.774 INFO [LoggingOptions.getTracer] - Using OpenTelemetry for tracing
chrome          | 07:36:21.775 INFO [LoggingOptions.createTracer] - Using OpenTelemetry for tracing
chrome          | 07:36:21.791 INFO [EventBusOptions.createBus] - Creating event bus: org.openqa.selenium.events.zeromq.ZeroMqEventBus
chrome          | 07:36:21.829 INFO [UnboundZmqEventBus.<init>] - Connecting to tcp://selenium-hub:4442 and tcp://selenium-hub:4443
chrome          | 07:36:21.857 INFO [UnboundZmqEventBus.<init>] - Sockets created
chrome          | 07:36:21.859 INFO [UnboundZmqEventBus.lambda$new$2] - Bus started
chrome          | 07:36:22.121 INFO [NodeServer.execute] - Reporting self as: http://172.28.0.5:5555
chrome          | 07:36:22.175 INFO [NodeOptions.report] - Adding Chrome for {"browserName": "chrome"} 8 times
chrome          | 07:36:22.298 INFO [NodeServer.execute] - Started Selenium node 4.0.0-alpha-6 (revision 5f43a29cfc): http://172.28.0.5:5555
chrome          | 07:36:22.302 INFO [NodeServer.execute] - Starting registration process for node id ff0154a7-ed4b-438a-887c-0a7f3a988cb4
selenium-hub    | 07:36:22.355 INFO [LocalDistributor.refresh] - Creating a new remote node for http://172.28.0.5:5555
selenium-hub    | 07:36:22.763 INFO [LocalDistributor.add] - Added node ff0154a7-ed4b-438a-887c-0a7f3a988cb4.
selenium-hub    | 07:36:22.770 INFO [Host.lambda$new$0] - Changing status of node ff0154a7-ed4b-438a-887c-0a7f3a988cb4 from DOWN to UP. Reason: http://172.28.0.5:5555 is ok
chrome          | 07:36:22.774 INFO [NodeServer.lambda$execute$0] - Node has been added

然后我对每个测试都有下一个方法:

Then I have the next method for every test:

<?php

namespace TestsAppBundleController;

use BehatMinkDriverSelenium2Driver;
use BehatMinkMink;
use BehatMinkSession;
use SymfonyBundleFrameworkBundleClient;
use SymfonyBundleFrameworkBundleTestWebTestCase;

abstract class BaseControllerTest extends WebTestCase
{
    /**
     * @var Client
     */
    protected $client;
    /**
     * @var Session
     */
    protected $session;

    public function visitUri($uri)
    {
        $this->client = static::createClient();
        $pass = $this->client->getKernel()->getContainer()->getParameter('http_basic_auth_pass');
        $host = 'localhost'; // I've tried several things here (like 172.28.0.5:5555)

        $driver = new Selenium2Driver('chrome');
        $mink = new Mink(array(
            'chrome' => new Session($driver)
        ));
        $driver->setTimeouts(['page load' => 900000]);

        $mink->setDefaultSessionName('chrome');

        $this->session = $mink->getSession();

        $this->session->visit('http://user:' . $pass . '@' . $host . $uri);
    }
}

我从一个特定的测试中调用这个方法:

And I call this method from a specific test:

    public function testClickOnSearch()
    {
        $this->visitUri(/mi-custom-uri);
        $page = $this->session->getPage();

        $this->session->wait(
            200000,
            "typeof jQuery !== 'undefined'"
        );

        $page->findButton('Buton text')->click();
        $this->assertContains('my-custom-uri-2', $this->session->getCurrentUrl());
    }

但我从来没有开始会话.如果我转到 http://localhost:4444/wd/hub/session/url 我会看到以下错误消息:

but I never get the session started. If I go to http://localhost:4444/wd/hub/session/url I see this error message:

"org.openqa.selenium.NoSuchSessionException:无法找到 ID 为 url 的会话 构建信息:版本:'4.0.0-alpha-6'，修订:'5f43a29cfc' 系统信息:主机:'fca78c7f81e6', ip: '172.28.0.3', os.name: 'Linux', os.arch: 'amd64', os.version: '5.4.0-42-generic', java.version: '1.8.0_252' Driver info: driver.version: unknown"

"org.openqa.selenium.NoSuchSessionException: Unable to find session with ID: url Build info: version: '4.0.0-alpha-6', revision: '5f43a29cfc' System info: host: 'fca78c7f81e6', ip: '172.28.0.3', os.name: 'Linux', os.arch: 'amd64', os.version: '5.4.0-42-generic', java.version: '1.8.0_252' Driver info: driver.version: unknown"

并执行测试，200 秒后抛出此错误:

And executing the test, after 200 seconds this error is thrown:

PHP 致命错误:在 null 上调用成员函数 click()

PHP Fatal error: Call to a member function click() on null

我确定缺少某些东西，但不知道是什么.有什么想法吗?

I'm sure something is missing but don't know what. Any idea?

推荐答案

这个错误信息...

org.openqa.selenium.NoSuchSessionException: Unable to find session with ID: url

Build info: version: '4.0.0-alpha-6', revision: '5f43a29cfc'

System info: host: 'fca78c7f81e6', ip: '172.28.0.3', os.name: 'Linux', os.arch: 'amd64', os.version: '5.4.0-42-generic', java.version: '1.8.0_252'

Driver info: driver.version: unknown

...暗示 ChromeDriver 无法启动/生成新的浏览上下文，即 Chrome 浏览器 会话，该会话反映在日志为:

...implies that the ChromeDriver was unable to initiate/spawn a new Browsing Context i.e. Chrome Browser session which gets reflected in the logs as:

Driver info: driver.version: unknown

因此您会看到错误:

PHP Fatal error: Call to a member function click() on null

最可能的原因是您使用的二进制文件版本之间的不兼容.

and the most probhable cause is the incompatibility between the version of the binaries you are using.

确保:

• ChromeDriver 已更新为当前 ChromeDriverv84.0 级别.
• Chrome 已更新至当前 Chrome 版本 84.0 级别.(根据 ChromeDriver v84.0 发行说明)
• 如果您的基本 Web 客户端 版本太旧，请卸载它并安装最新的 GA 和发布版本的 Web 客户端.
• 进行一次系统重启.
• 总是在 tearDown(){} 方法中调用 driver.quit() 来关闭 &优雅地销毁 WebDriver 和 Web Client 实例.

• ChromeDriver is updated to current ChromeDriver v84.0 level.
• Chrome is updated to current Chrome Version 84.0 level. (as per ChromeDriver v84.0 release notes)
• If your base Web Client version is too old, then uninstall it and install a recent GA and released version of Web Client.
• Take a System Reboot.
• Always invoke driver.quit() within tearDown(){} method to close & destroy the WebDriver and Web Client instances gracefully.

您可以在以下位置找到一些相关的详细讨论:

You can find a couple of relevant detailed discussions in:

• org.openqa.selenium.NoSuchSessionException: 在使用 ChromeDriver Chrome 和 Java 的 Selenium 自动化测试中没有此类会话错误

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