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role-aqa:e2e-testing

End-to-end test automation with Playwright (codegen, trace viewer, MCP, sharding, visual comparisons, fixtures, component testing), Cypress v13, Selenium 4 (BiDi), WebdriverIO, TestCafe, Robot Framework. Visual regression: Percy, Chromatic, Applitools, BackstopJS, Lost Pixel. Cross-browser: Brows...

rnavarych/alpha-engineer0installs15starsProductivity & Planning

SKILL.md

Full skill instructions

E2E Testing

When to use

  • Setting up or extending an E2E test suite (Playwright, Cypress, Selenium, WebdriverIO)
  • Writing reliable locators, fixtures, or multi-browser project configs in Playwright
  • Adding visual regression testing (Percy, Chromatic, Applitools, BackstopJS)
  • Running cross-browser tests on BrowserStack, Sauce Labs, or LambdaTest
  • Adding accessibility checks (axe) to existing E2E flows
  • Debugging or quarantining flaky tests
  • Choosing a framework for a team that includes non-developer testers

Core principles

  1. Auto-wait over sleep — Playwright's auto-wait eliminates race conditions; any sleep() in tests is a bug waiting to happen
  2. Locator hierarchy matters — role > label > placeholder > text > testId > CSS; resilience decreases from left to right
  3. Fixtures own setup and teardown — create data via API before tests, clean up after; never rely on pre-existing state
  4. Flaky = broken — a test with >2% unreliable failure rate is a broken test; quarantine and fix, never retry into silence
  5. Visual tests need masking — dynamic content (prices, timestamps, avatars) must be masked before snapshotting or diffs are noise

Reference Files

  • references/​playwright-core.md — auto-wait, locator hierarchy, fixtures, test.step, multi-browser projects, sharding, API testing, component testing, visual comparisons, MCP integration
  • references/​cypress-selenium-alternatives.md — Cypress v13 (session, intercept, component testing, multi-origin), Selenium 4 (BiDi, relative locators, CDP, Grid), WebdriverIO, TestCafe, Robot Framework, CodeceptJS
  • references/​visual-regression-cloud-testing.md — Percy, Chromatic, Applitools, BackstopJS, Lost Pixel, reg-suit; visual testing best practices; BrowserStack, Sauce Labs, LambdaTest setup
  • references/​pom-accessibility-flaky-tests.md — Page Object Model with TypeScript, playwright-axe and cypress-axe integration, WCAG assertions, flaky test detection and quarantine workflow, test data patterns