Parallel Testing with Selenium Grid and Integration with Jenkins

Youtube Webinar Video:

Getting Started:

This document will help you to run the following types of parallel tests with Java TestNG.

• Single Thread TestSuite with Java Classes
• Parallel Thread TestSuite with Java Classes
• Parallel Cross Browser Testing

Also will help you to run different type Selenium Grid configurations inside the automation project

• Selenium Grid Standalone
• Selenium Grid Hub-node
• Selenium Grid Docker Standalone
• Selenium Grid Docker Hub-node
• Bonigarcia WebDriverManager
• ChromeDriver
• GeckoDriver
• Headless test run option

Requirements:

• Install Java JDK8 https://www.oracle.com/tr/java/technologies/javase/javase8-archive-downloads.html
• Install IntelliJ IDEA https://www.jetbrains.com/idea/download/
• Install Docker for MacOs / Windows https://www.docker.com/products/docker-desktop
• Download ChromeDriver, GeckoDriver and Selenium Grid JAR file https://www.selenium.dev/downloads/

Selenium Grid Configuration Types:

Open a terminal window for standalone mode and keep it open. Hub and Node requires 2 terminal windows. Docker commands does not require to keep terminal windows.

• STANDALONE

cd YOUR-PROJECT-FOLDER/src/test/resources/grid  
java -jar selenium-server-4.0.0-rc-3.jar standalone

• HUB-NODE

cd YOUR-PROJECT-FOLDER/src/test/resources/grid  
java -jar selenium-server-4.0.0-rc-3.jar hub  
cd src/test/resources/grid  
java -jar selenium-server-4.0.0-rc-3.jar node --detect-drivers true --max-sessions 20 --override-max-sessions true

• STANDALONE (DOCKER)

docker run -d -p 4444:4444 -p 7900:7900 --shm-size="2g" selenium/standalone-firefox:4.0.0-rc-3-20211010

• HUB-NODE (DOCKER)

Hub (Docker)

docker run -d -p 4442-4444:4442-4444 --name selenium-hub selenium/hub:4.0.0-rc-3-20211010

Node (Docker)

docker run -d -p 5555:5555 \
          --shm-size="2g" \
          -e SE_EVENT_BUS_HOST=YOUR_IP_ADDRESS \
          -e SE_EVENT_BUS_PUBLISH_PORT=4442 \
          -e SE_EVENT_BUS_SUBSCRIBE_PORT=4443 \
          -e SE_NODE_HOST=YOUR_IP_ADDRESS \
          selenium/node-firefox:4.0.0-rc-3-20211010

Node (Standalone Mac — Optional)

cd YOUR-PROJECT-FOLDER/src/test/resources/grid
 
java -jar selenium-server-4.0.0-rc-3.jar node --detect-drivers true --max-sessions 20 --override-max-sessions true --port 5554

How to set Driver files globally?

For MacOS, copy the ChromeDriver or GeckoDriver to the “/usr/bin/local” folder and right-click to them and choose open to skip access permission only once.

For Windows OS, Create a folder on your system as “C:\SeleniumDrivers”. Copy the ChromeDriver or GeckoDriver to this new folder and add this folder to your PATH environment variable.

“ — detect-drivers true” parameter will detect all drivers automatically on your computer. It’s not a requirement for docker.

How to run TestNG XML test suite from terminal and Jenkins CI?

Run the following command on your terminal. If mvn is not recognised on your OS, you have to install it from here https://maven.apache.org/download.cgi If you can run it from terminal, you can create a new Jenkins job and configure it as described in the Youtube video.

mvn clean test -Dsurefire.suiteXmlFiles=src/test/java/suites/ParallelTestWithBrowsers.xml

How can we monitor and watch automation tests with Selenium Grid Docker?

Monitoring sessions:

http://127.0.0.1:4444

Watching tests with built-in VNC inside of docker image. password is “secret”

http://127.0.0.1:7900

GitHub

GitHub - software-testing-bootcamp/testng-paralleltesting

Helpful Docs:

https://mvnrepository.com/

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

https://www.selenium.dev/documentation/grid/

https://bonigarcia.dev/webdrivermanager/

https://testng.org/doc/

https://github.com/SeleniumHQ/docker-selenium

https://www.jenkins.io/