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Selenium Automation Testing · Module 9 of 10

Selenium Grid and CI

Scale and automate test runs.

📖 Key ideas

  1. Selenium Grid distributes tests across browsers and machines.
  2. Run Grid easily with Docker (selenium/standalone-chrome).
  3. Cloud grids: BrowserStack, Sauce Labs, LambdaTest.
  4. Run tests headless in CI (GitHub Actions, Jenkins).
  5. Publish reports and screenshots as CI artifacts.
💡 Real-life example: Selenium Grid is a coaching centre with many classrooms: tests run in parallel instead of one queue.
Grid hub/routerDistributes tests to nodes
NodeMachine running browsers
RemoteWebDriverDriver connecting to a Grid
Cloud gridHosted browser farm