e2e-testing

Playwright E2E testing patterns with Page Object Model, configuration, CI/CD setup, and flaky test strategies. Comprehensive Playwright patterns for building stable, fast, and maintainable E2E test suites. Race conditions: Network timing: Animation timing: - Provides Page Object Model structure for maintainable test organization, with reusable page classes that encapsulate locators and navigation logic - Covers multi-browser testing across Chromium, Firefox, WebKit, and mobile devices with configurable retries, parallelization, and artifact capture (screenshots, videos, traces) - Includes flaky test identification and remediation patterns: quarantine techniques, race condition fixes, network and animation timing strategies, and repeat-test commands for diagnosis - Demonstrates CI/CD integration via GitHub Actions with artifact upload, plus specialized patterns for wallet/Web3 mocking and financial transaction testing with production safeguards