| Feature | Benefit | | :--- | :--- | | | Run tests on OS/Browser combinations not available locally (e.g., Safari on Windows). | | Parallelism | Distribute tests across multiple machines to reduce execution time. | | Centralized Hub | Single entry point for all test traffic; simplifies network configuration. | | Auto-Scaling | Easily add or remove testing capacity (Nodes) without downtime. | | CI/CD Integration | Seamless integration with Jenkins, Azure DevOps, GitLab CI, etc. |
| Tool | Protocol | Use Case | |------|----------|----------| | | W3C WebDriver | General cross-browser, on-prem grid | | Selenoid | Docker-native | Lightweight, high-density container grid | | BrowserStack/Sauce Labs | Cloud API | No infrastructure management | | Playwright | CDP | Fast, modern web apps (no server needed for parallel) | | Cypress | Network proxy | Component & E2E testing (not designed for Selenium Server) | selenium server
Selenium Server, also known as Selenium Grid, is a part of the Selenium Suite that allows users to run tests on multiple machines and browsers in parallel. It acts as a proxy server, routing test commands from the test script to the browser instance. | Feature | Benefit | | :--- |