Selenium distributed testing

selenium Distributed testing

Selenium Grid

Selenium Grid yes Selenium One of the three components of , Its function is to execute tests in a distributed way .

UI The advantages and value of automation are mainly reflected in ： Repeat the test and multi browser compatibility test ; What is the concept of distribution ？ Simply put, the boss received the task , Give it to your hands to work ;Selenium Grid It can control multiple machines and multiple browsers to execute test cases , The distributed execution environment is Selenium Grid called node node .

Selenium Grid principle

Selenium Grid Actually it is based on Selenium RC Of , The so-called distributed structure is composed of a hub Nodes and a number of node The composition of agent nodes . Hub It is used to manage the registration information and status information of each agent node , And accept the request call from the remote client code , Then forward the requested command to the agent node to execute .

Selenium Grid What's the usage? ？

1. In different browsers 、 Run tests on the operating system and the machine - Distributed testing
2. For compatibility testing to the greatest extent
3. Improve the efficiency of automated execution , Reduce running time

Selenium Grid The deployment environment

start-up Selenium Grid In three ways ：

1. Start... From the command line --bat start-up
2. use JSON Profile startup
3. use docker start-up

start-up Selenium Grid The preparatory work

Will use 2 Taiwan machine , One runs hub The other one is running node, For ease of description , Will run hub Our machine is named “Machine H”（IP：192.168.1.114）, function node Our machine is named “Machine N”（IP：192.168.1.87）;2 The machines must be in the same LAN .

Environmental requirements

1. selenium Grid rely on java Environmental Science , So whether it's hub And is node machine , There must be JDK Environment
2. download selenium server,selenium server Namely selenium Grid The core , It is also the key to start , take selenium-server- standalone-X.XX.jar We separate “Machine H” and “Machine N” On （ Custom path ）

Command line start -Selenium Grid

In the machine “Machine H” Open the command line on the , Switch to selenium server Path , function ：java -jar selenium-server- standalone-3.141.59.jar -role hub -port 5566.

verification Hub Startup successful ：

In the machine “Machine H” Enter... In the browser on the ：http://localhost:5566/grid/console , You will see the following figure ：

In the machine “Machine N” Check out Hub, The address in the browser localhost To be changed to “Machine H” Of IP Address