How can I set up a headless Selenium environment using Docker Compose?

How can I set up a headless Selenium environment using Docker Compose?

You can set up a headless Selenium environment using Docker Compose by creating a docker-compose.yml file that defines the services you need, such as Selenium Hub and browser nodes.

What should I include in the docker-compose.yml file?

Your docker-compose.yml should include services for the Selenium Hub and the browser nodes, like Chrome or Firefox. Here's a basic example:

version: '3'
services:
  selenium-hub:
    image: selenium/hub
    ports:
      - "4444:4444"

  chrome:
    image: selenium/node-chrome
    depends_on:
      - selenium-hub
    environment:
      - HUB_HOST=selenium-hub

  firefox:
    image: selenium/node-firefox
    depends_on:
      - selenium-hub
    environment:
      - HUB_HOST=selenium-hub

How do I run the Docker Compose setup?

You can run the setup by navigating to the directory containing your docker-compose.yml file and executing the command docker-compose up -d. This will start the services in detached mode.

Can I run tests in headless mode?

Yes, both Chrome and Firefox nodes can run in headless mode by default in the Docker images. You just need to configure your test scripts to use the headless options.