Feat: Workflow integration CI/CD pipeline

[pandigresik]

Pull Request: Feat: Workflow integration CI/CD pipeline

Description

Add a comprehensive CI/CD integration pipeline with GitHub Actions for automated testing, coverage gating, and code quality enforcement. This includes unit tests, integration tests, contract tests, e2e tests, a coverage threshold gate, flaky test detection, and Laravel Pint configuration. The lint job is temporarily disabled to unblock the pipeline while style issues are addressed separately.

Changes made:

1. CI/CD Pipeline: New .github/workflows/integration-regression.yml — GitHub Actions workflow with jobs for lint (disabled), unit tests (with coverage), integration tests (with coverage), contract tests, e2e tests (gated), and coverage gate validation
2. Coverage Gate Script: New bin/check-coverage.php — CLI tool to enforce minimum coverage threshold and maximum allowed coverage drop from previous runs
3. Flaky Test Detection: New bin/detect-flaky-tests.php — Script to analyze JUnit XML reports for flaky, slow, or zero-duration tests
4. Code Style Config: New pint.json — Laravel Pint configuration for enforcing PHP code style standards
5. PHPUnit Config: Modified phpunit.xml — Added Contract test suite and trailing whitespace cleanup
6. Test Cleanup: Modified tests/Feature/Auth/AuthorizationTest.php — Removed obsolete kontributor-artikel role test
7. Test Setup Improvement: Modified tests/TestCase.php — Improved Profil seeding to handle existing records gracefully

Reason for change:

• Automated quality gates: Ensure every PR meets minimum coverage and style standards before merge
• Regression prevention: Catch regressions early with automated contract and e2e tests
• Developer productivity: Reduce manual testing overhead by automating the verification pipeline
• Test stability: Remove flaky/obsolete tests and add detection tooling for unstable tests

Impact of change:

• ✅ All future PRs will be automatically tested for regressions
• ✅ Coverage thresholds prevent code quality degradation
• ✅ Contract tests ensure API compatibility
• ✅ E2E tests verify critical user flows
• ✅ Flaky test detection helps maintain test suite reliability
• ✅ Standardized code style via Pint configuration

Related Issue

• Solution for fix related to issue CI workflow integrasi untuk regression (unit → contract → integration → E2E) + test metrics/coverage gating #1676

#1676

Steps to Reproduce

Before (no CI/CD):

1. Push changes to a branch
2. Manually run tests locally
3. No automated quality gates
4. ❌ Easy to miss regressions or coverage drops

After (CI/CD pipeline):

1. Create PR against rilis-dev
2. GitHub Actions automatically triggers the pipeline
3. Unit, integration, contract, and e2e tests run
4. Coverage gate validates thresholds
5. ✅ Pipeline blocks merge if any stage fails

Checklist

• I have complied with script writing rules
• I have followed pull request review process
• I have created unit test/integration test to verify the fix
• Manual testing has been done in development environment
• No console errors or warnings
• Code has been reviewed by at least 1 person

Technical Details

Technical Explanation

The CI/CD pipeline is organized as a DAG with the following stages:

lint ──────────────────────────────────────┐
unit (coverage) ───────────────────────────┤
                                           ├──→ coverage-gate
generate-openapi ──→ contract ─────────────┤
                                           ├──→ e2e (gated)
integration (coverage) ────────────────────┘

• Unit Tests: Fast MySQL-backed tests running with pcov coverage
• Integration Tests: Runs against MySQL service container with coverage
• Contract Tests: Validates API contract against generated OpenAPI spec
• Coverage Gate: Custom PHP script (bin/check-coverage.php) validates min threshold (30%) and max allowable drop (2%)
• Flaky Detection: bin/detect-flaky-tests.php analyzes JUnit XML for unstable tests
• E2E: Gated stage running only if all prior stages pass

Configuration changes

• phpunit.xml — Added Contract test suite
• pint.json — New Laravel Pint configuration for code style

Dependencies added

No new dependencies

Testing

Manual Testing

• Pipeline runs successfully on push to branch
• Coverage gate script works with valid/invalid thresholds
• Flaky detection script parses JUnit XML correctly
• Regression Testing — test existing features are not broken

Automated Testing

• Unit Test — Existing test suite passes
• Integration Test — Existing integration tests pass
• Contract Test — Contract validation passes

Breaking Changes

None

Migration Guide

Not required

References

• GitHub Actions Documentation
• Laravel Pint
• PHPUnit

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Additional notes: The lint job is currently commented out. It should be re-enabled in a follow-up PR once existing style issues are resolved across the codebase.

[github-actions]

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