在Ruby Capybara测试套件中使用seleniumstandalone-chrome docker镜像。

Question

我试图用Ruby写一个Capybara测试套件（不使用Rails）。

我想在Docker容器中运行Ruby代码。

FROM ruby:2.7

RUN gem install bundler

COPY Gemfile Gemfile
COPY Gemfile.lock Gemfile.lock

RUN bundle install

COPY . .

CMD ["bundle", "exec", "rspec", "spec"]

我的测试需要使用Ruby镜像中没有的Chrome无头版。 我试图创建一个docker-compose文件来包含Ruby代码和无头Chrome镜像。

version: '3.7'
networks:
  mynet:
services:
  admin:
    container_name: mrt-integ-tests
    image: cdluc3/mrt-integ-tests
    build:
      context: .
      dockerfile: Dockerfile
    volumes:
    - type: bind
      source: ./config/test_config.yml
      target: /config/test_config.yml
    stdin_open: true
    tty: true
    networks:
      mynet:
    depends_on:
    - chrome
  chrome:
    container_name: chrome
    image: selenium/standalone-chrome
    ports:
    - published: 4444
      target: 4444
    networks:
      mynet:

这是我尝试创建Capybara会话的方式。

    Capybara.register_driver :selenium_chrome do |app|
      args = ['--no-default-browser-check', '--start-maximized', '--headless', '--disable-dev-shm-usage']
      caps = Selenium::WebDriver::Remote::Capabilities.chrome("chromeOptions" => {"args" => args})

      Capybara::Selenium::Driver.new(
        app,
        browser: :remote,
        desired_capabilities: caps,
        url: "http://chrome:4444/wd/hub"
      )
    end
    @session = Capybara::Session.new(:selenium_chrome)

当我启动容器时，我看到以下错误。

chrome    | 05:39:44.350 INFO [GridLauncherV3.lambda$buildLaunchers$3] - Launching a standalone Selenium Server on port 4444
chrome    | 2020-06-04 05:39:44.420:INFO::main: Logging initialized @766ms to org.seleniumhq.jetty9.util.log.StdErrLog
chrome    | 05:39:44.920 INFO [WebDriverServlet.<init>] - Initialising WebDriverServlet
chrome    | 05:39:45.141 INFO [SeleniumServer.boot] - Selenium Server is up and running on port 4444
chrome    | 05:39:47.431 INFO [ActiveSessionFactory.apply] - Capabilities are: {
chrome    |   "browserName": "chrome",
chrome    |   "chromeOptions": {
chrome    |     "args": [
chrome    |       "--no-default-browser-check",
chrome    |       "--start-maximized",
chrome    |       "--headless",
chrome    |       "--disable-dev-shm-usage"
chrome    |     ]
chrome    |   },
chrome    |   "cssSelectorsEnabled": true,
chrome    |   "javascriptEnabled": true,
chrome    |   "nativeEvents": false,
chrome    |   "rotatable": false,
chrome    |   "takesScreenshot": false,
chrome    |   "version": ""
chrome    | }
chrome    | 05:39:47.435 INFO [ActiveSessionFactory.lambda$apply$11] - Matched factory org.openqa.selenium.grid.session.remote.ServicedSession$Factory (provider: org.openqa.selenium.chrome.ChromeDriverService)
chrome    | Starting ChromeDriver 83.0.4103.39 (ccbf011cb2d2b19b506d844400483861342c20cd-refs/branch-heads/4103@{#416}) on port 13554
chrome    | Only local connections are allowed.
chrome    | Please see https://chromedriver.chromium.org/security-considerations for suggestions on keeping ChromeDriver safe.
chrome    | ChromeDriver was started succ[e1s5s9f1u2l4l9y1.8
chrome    | 7.473][SEVERE]: bind() failed: Cannot assign requested address (99)
chrome    | 05:39:48.211 INFO [ProtocolHandshake.createSession] - Detected dialect: W3C
chrome    | 05:39:48.247 INFO [RemoteSession$Factory.lambda$performHandshake$0] - Started new session 1ed95304843a1d5ab904708d998710a0 (org.openqa.selenium.chrome.ChromeDriverService)

你有什么建议来解决这个错误？

Answer 1

我这里有一个部分解决方案。 添加 -白名单-ips 到我的浏览器选项，使我的测试功能。 请看 https:/github.comRobCherrydocker-chromedriverissues15。

    args = ['--no-default-browser-check', '--start-maximized', '--headless', '--disable-dev-shm-usage']

到

    args = ['--no-default-browser-check', '--start-maximized', '--headless', '--disable-dev-shm-usage', '--whitelisted-ips']

有趣的是，在chrome容器中仍然会产生以下错误。

[1591286416.104][SEVERE]: bind() failed: Cannot assign requested address (99)