Run tests on dockerized selenium grid

This post is an instruction how to setup selenium grid, chrome/firefox node containers using docker and simply run automated test scripts via remote driver

Install docker and docker compose

An installation guide can be found under this link docker compose

Dockerized selenium grid setup

Copy below content and save it in your project root directory as docker-compose.yaml file

docker-compose.yaml

# To execute this docker-compose yml file use docker-compose -f <file_name> up
# Add the -d flag at the end for detached execution
version: "3"
services:
  selenium-hub:
    image: selenium/hub:3.141.59-dubnium
    container_name: selenium-hub
    ports:
      - "4444:4444"
  chrome:
    image: selenium/node-chrome:3.141.59-dubnium
    volumes:
      - /dev/shm:/dev/shm
    depends_on:
      - selenium-hub
    ports:
      - "5800:5800"
    environment:
      - HUB_HOST=selenium-hub
      - HUB_PORT=4444
  firefox:
    image: selenium/node-firefox:3.141.59-dubnium
    volumes:
      - /dev/shm:/dev/shm
    depends_on:
      - selenium-hub
    ports:
      - "5801:5800"
    environment:
      - HUB_HOST=selenium-hub
      - HUB_PORT=4444

Run below command. Docker compose will download images and run services defined in yaml file.

docker-compose up -d

To stop selenium grid and cleanup containers run:

docker-compose down

Now your selenium grid is up and running. Follow link localhost:4444 or navigate directly to grid console.

More info can be found here

Setup driver in your project to run tests on selenium grid

java

ChromeOptions chromeOptions = new ChromeOptions();
String node = "http://localhost:4444/wd/hub";
WebDriver driver = new RemoteWebDriver(new URL(node), chromeOptions);

c#

ChromeOptions chromeOptions = new ChromeOptions();
string node = "http://localhost:4444/wd/hub";
IWebDriver = new RemoteWebDriver(new Uri(node), chromeOptions.ToCapabilities(), TimeSpan.FromSeconds(600));

ruby – capybara

node = 'http://localhost:4444/wd/hub'
capabilities = Selenium::WebDriver::Remote::Capabilities.chrome
Capybara.register_driver :remote_browser do |app|
  Capybara::Selenium::Driver.new(
      app,
      browser: :remote,
      url: node,
      desired_capabilities: capabilities
  )
end
Capybara.default_driver = :remote_browser
Capybara.javascript_driver = :remote_browser