[Feature] Phase 6: Testing & Validation

[GrammaTonic]

📊 Phase 6: Testing & Validation

Timeline: Week 5 (2025-12-14 to 2025-12-21)
Status: ⏳ Blocked by Phase 5
Goal: Validate all functionality, measure performance overhead, and ensure production readiness

🎯 Objectives

• Create comprehensive integration tests for metrics endpoint
• Measure performance overhead (CPU, memory, response time)
• Test all runner types under load
• Validate metrics persistence across restarts
• Test multi-runner scaling scenarios
• Security audit for sensitive data exposure

✅ Tasks (14 Total)

• TASK-057: Create integration test script tests/integration/test-metrics-endpoint.sh
• TASK-058: Create performance test script tests/integration/test-metrics-performance.sh
• TASK-059: Test standard runner with metrics under load (10 concurrent jobs)
• TASK-060: Test Chrome runner with metrics under load (5 concurrent browser jobs)
• TASK-061: Test Chrome-Go runner with metrics under load (5 concurrent Go + browser jobs)
• TASK-062: Validate metrics persistence across container restart
• TASK-063: Test scaling scenario: deploy 5 runners simultaneously
• TASK-064: Measure Prometheus storage growth over 7 days with 3 runners
• TASK-065: Validate all Grafana dashboards display data correctly with real runner workloads
• TASK-066: Benchmark dashboard query performance: all panels must load in <2s with 7 days of data
• TASK-067: Security scan: verify no sensitive data in metrics, no new vulnerabilities introduced
• TASK-068: Documentation review: verify all setup steps work for new users (clean install test)
• TASK-069: Update tests/README.md with instructions for running metrics integration tests
• TASK-070: Add metrics tests to CI/CD pipeline (.github/workflows/ci-cd.yml) if applicable

📋 Acceptance Criteria

• ✅ All integration tests pass (HTTP 200, Prometheus format, metrics present)
• ✅ Performance overhead <1% CPU and <50MB memory per runner
• ✅ Metrics endpoint response time <100ms (p95)
• ✅ All runner types tested under realistic load
• ✅ Metrics persist correctly across container restarts
• ✅ Scaling to 5 concurrent runners works without issues
• ✅ No sensitive data exposed in metrics output
• ✅ Documentation validated by clean install test (<15 minutes setup)

🔗 Dependencies

• BLOCKED BY: Phase 5 (requires complete documentation)

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Part of: Prometheus Monitoring Implementation (v2.3.0)