Property-Based Testing + Visual Regression + CI Integration + Test Dashboard

[Mosss-OS]

Summary

Flow is an AI-powered regression test suite for Vercel Commerce using Playwright + Passmark. It can be extended with property-based testing and visual regression.

Recommended Changes

1. Property-Based Testing

• Add property-based testing for regression scenarios:
  • Generate random valid/invalid product data
  • Verify invariants: cart total = sum of item prices, checkout requires items
  • Use fast-check for TypeScript property-based testing
  • Catches edge cases that manual test cases miss

2. Visual Regression Testing

• Add Playwright Visual Comparisons:
  • Screenshot key pages (homepage, product page, checkout)
  • Compare against baselines to detect visual regressions
  • Set pixel mismatch thresholds (0.1% for critical pages, 1% for others)
  • Auto-update baselines on intentional UI changes

3. CI/CD Integration

• Run tests in CI pipeline:
  • On PR: run full regression suite against preview deployment
  • On merge to main: run smoke tests against staging
  • On release: full suite against production
• Add test timeouts and retry logic

4. Test Dashboard & Reporting

• Set up a test reporting dashboard:
  • Historical test run data (pass/fail trends)
  • Performance regression alerts
  • Visual diff viewer for failed screenshots
  • Integration with GitHub Checks API

5. Flaky Test Detection

• Implement flaky test detection:
  • Track pass/fail ratio per test
  • Flag tests that pass < 90% of runs
  • Auto-quarantine flaky tests with notification

6. Coverage Expansion

• Add API contract testing (Pact or similar)
• Add performance budget tests (Lighthouse assertions)
• Add accessibility regression tests (axe-core)
• Add security scan tests (OWASP ZAP or similar)