UI testing

This compares Playwright, Selenium, Cypress, and TestCafe for UI testing across language support, setup, browser coverage, CI/CD, debugging, and maintainability. Key differences: Playwright offers modern features and tracing; Selenium brings widest language and grid support; Cypress excels for JS teams with strong DX; TestCafe is simple with built-in concurrency. Recommendations align each tool to team stack, browser needs, and configuration tolerance in ui testing.