1、简介

• selenium grid远程运行selenium test
• 主旨是在多个机器，上并行运行selenium

优点

• 所有测试的中心入口点
• 管理和控制浏览器运行的Nodes/环境
• 扩展
• 并行运行测试
• 跨平台的测试
• 负载平衡

组成

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2、下载与使用

• 官网: https://www.selenium.dev/downloads/
• 镜像地址：http://selenium-release.storage.googleapis.com/index.html
• hub
  • java -jar selenium-server-standalone-3.141.59.jar -role hub
• node
  • java -jar selenium-server-standalone-3.141.59.jar -role node -port 5677

配置文件启动Node

• java -jar selenium-server-standalone.jar -role node -nodeConfig node1Config.json
• https://www.selenium.dev/documentation/en/grid/setting up_your_own grid/

3、实战

1. 下载selenium grid

   
   
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2. 将此.jar文件配置到环境变量
3. 在Python中安装Selenium库、将Chromedriver配置到环境变量
4. 进入selenium的GitHub网址：https://github.com/SeleniumHQ
   
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5. 在.jar文件的目录下创建node.json文件，内容为上图

{
  "capabilities":
  [
    {
      "browserName": "firefox",
      "marionette": true,
      "maxInstances": 5,
      "seleniumProtocol": "WebDriver"
    },
    {
      "browserName": "chrome",
      "maxInstances": 5,
      "seleniumProtocol": "WebDriver"
    },
    {
      "browserName": "internet explorer",
      "platform": "WINDOWS",
      "maxInstances": 1,
      "seleniumProtocol": "WebDriver"
    },
    {
      "browserName": "safari",
      "technologyPreview": false,
      "platform": "MAC",
      "maxInstances": 1,
      "seleniumProtocol": "WebDriver"
    }
  ],
  "proxy": "org.openqa.grid.selenium.proxy.DefaultRemoteProxy",
  "maxSession": 5,
  "port": -1,
  "register": true,
  "registerCycle": 5000,
  "hub": "http://localhost:4444",
  "nodeStatusCheckTimeout": 5000,
  "nodePolling": 5000,
  "role": "node",
  "unregisterIfStillDownAfter": 60000,
  "downPollingLimit": 2,
  "debug": false,
  "servlets" : [],
  "withoutServlets": [],
  "custom": {}
}

6. 启动hub

   
   
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7. 启动node

   
   
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8. 编写代码：

• 使用selenium中的DesiredCapabilities类，复制其中的Chrome Json方法

    }
    CHROME = {
        "browserName": "chrome",
        "version": "",
        "platform": "ANY",
    }

• 实战代码：

from selenium.webdriver import DesiredCapabilities
from selenium.webdriver import Remote


class TestGrid:
    def test_grid(self):
        hub_url = "http://127.0.0.1:4444/wd/hub"
        capability = DesiredCapabilities.CHROME.copy()
        for i in range(1, 5):
            driver = Remote(command_executor=hub_url, desired_capabilities=capability)
            driver.get("https://www.baidu.com")

9. 查看日志，一共运行了4四次

   
   
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下一节：基于Jenkins的自动化调度详解。