automation - 我的 nightwatch.js 测试无法在 CentOS 的 headless Chrome 中运行

Question

我使用 Nightwatch 版本 1.0.18 运行 nightwatch.js 测试，它在 Windows 环境中工作，但是当我在安装 Xvfb 后在 centOS 中运行它时，我发现以下错误。

 Error while running .navigateTo() protocol action: invalid session id

 Error while running .locateMultipleElements() protocol action: invalid session id

 Error while running .locateMultipleElements() protocol action: invalid session id

这是我的 nightwatch.json 文件代码:

{
  "src_folders": [
    "./tests"
  ],
  "output_folder": "./reports",
  "custom_commands_path": "./custom_commands",
  "custom_assertions_path": "",
  "test_workers": false,
  "webdriver": {
    "start_process": true
  },
  "test_settings": {
    "default": {
      "webdriver": {
        "port": 9515,
        "server_path": "./node_modules/chromedriver/lib/chromedriver/chromedriver",
        "cli_args": [
          "--log",
          "debug"
        ]
      },
      "skip_testcases_on_fail": true,
      "desiredCapabilities": {
        "browserName": "chrome",
        "javascriptEnabled": true,
        "acceptSslCerts": true,
        "chromeOptions": {
          "args": [
            "headless",
            "no-sandbox",
            "disable-gpu"
          ]
        }
      }
    }
  }
}

我是否缺少在 centOS 环境中运行测试的东西，因为它在 windows 环境中运行？

Answer 1

我在 Nightwatchjs 和 npm chomedriver 设置方面遇到了同样的问题。

背景:一切正常，直到我最近更新了系统上的 Chromium。除了原始帖子中的错误外，详细日志记录还显示:

{ 
  message: 'unknown error: Chrome failed to start: exited abnormally',
  error: [ 
    "(unknown error: DevToolsActivePort file doesn't exist)",
    '(The process started from chrome location /usr/bin/chromium is no longer running, so ChromeDriver is assuming that Chrome has crashed.)',
    '(Driver info: chromedriver=2.46.628388 (4a34a70827ac54148e092aafb70504c4ea7ae926),platform=Linux 4.9.0-8-amd64 x86_64)'
  ],
}

在 downloading the standalone chromedriver 之后(2.46.628388) 匹配我的 Chromium 版本 (72.0.3626.69) 它仍然显示相同的错误。

解决方案:我结束了 downloading an older version of Chromium (71.0.3578.127) 并将 chromeOptions.binary 设置为 chromium 71 二进制文件的新路径。我还必须在 chromeOptions.args 中包含“no-sandbox”。

这是上述网站的摘录:

Downloading old builds of Chrome / Chromium

Let's say you want a build of Chrome 44 for debugging purposes. Google does not offer old builds as they do not have up-to-date security fixes.

However, you can get a build of Chromium 44.x which should mostly match the stable release. Here's how you find it:

• Look in https://googlechromereleases.blogspot.com/search/label/Stable%20updates for the last time "44." was mentioned.
• Loop up that version history ("44.0.2403.157") in the Position Lookup
• In this case it returns a base position of "330231". This is the commit of where the 44 release was branched, back in May 2015.*
• Open the continuous builds archive
• Click through on your platform (Linux/Mac/Win)
• Paste "330231" into the filter field at the top and wait for all the results to XHR in.
• Eventually I get a perfect hit: https://commondatastorage.googleapis.com/chromium-browser-snapshots/index.html?prefix=Mac/330231/
• Sometimes you may have to decrement the commit number until you find one.
• Download and run!