03-19 Distributed Testing-Selenium Grid

Introduction

Selenium Grid runs Selenium test remotely, the main idea is to run selenium in parallel on multiple machines

advantage

• It is the central entry point for all tests
• Can manage and control the Nodes/environment where the browser is running
• Expand
• Run tests in parallel
• Cross-platform testing
• Load balancing

composition

Installation and use

Environmental preparation:

• java environment
• Webdriver corresponding to the browser

download link:

https://www.selenium.dev/downloads/

Official documents:

https://github.com/SeleniumHQ/selenium/wiki/Grid2

Start selenium grid:

# 作为 hub 角色启动
java -jar selenium-server-standalone-<version>.jar -role hub

Configure node.json, this file can manage the distributed environment, the sample is as follows:

{
  "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": {}
}

Use the configuration file to run selenium grid:

java -jar selenium-server-standalone.jar -role node -nodeConfig nodeconfig.json