test: Phase 4B GitHub API Integration Tests (118 tests)

CHANGELOG.md

@@ -28,6 +28,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- **Test Coverage Expansion — Phase 4B: GitHub API Integration Tests Complete** — Comprehensive test coverage for GitHub API integration patterns and batch operations across issues, labels, pull requests, and milestones. Phase 4B deliverables include: (1) `github-fixtures.js` (467 LOC) — Central fixture library providing realistic GitHub API mock responses for all object types (issues, labels, PRs, milestones, search results) with error response fixtures (401/403/404/409/422, rate limits, timeouts) and helper factories (createIssueList, createPRList) for test data generation; (2) `api-issues-and-labels.test.js` (39 tests) — Comprehensive GitHub API tests for issue CRUD operations (getIssue, createIssue, updateIssue) and label management (addLabels, removeLabel, listIssueLabels, createLabel, updateLabel, deleteLabel, listLabels, searchIssues) with label sync scenarios, conflict handling, and error handling coverage; (3) `api-pr-and-milestones.test.js` (48 tests) — Pull request and milestone operations including getPR, createPR, updatePR, mergePR, getPRLinkedIssues, listPRs, addPRLabels, and milestone CRUD (getMilestone, createMilestone, updateMilestone, closeMilestone, deleteMilestone, listMilestones) with PR workflow integration and request history auditing; (4) `api-batch-and-performance.test.js` (31 tests) — Batch operations and performance testing covering createIssuesBatch, updateIssuesBatch, addLabelsBatch, pagination handling across multiple pages, rate limit enforcement with remaining count tracking, bulkAssignToMilestone with performance metrics, parallel operations, and real-world integration scenarios. **Total Phase 4B: 118 tests, 100% passing** with comprehensive coverage of rate limiting (checkRateLimit enforcement), pagination (searchWithPagination, listWithPagination), batch operations with configurable sizing, performance metrics collection (duration, avgPerItem, min/max tracking), and request history auditing. All tests follow CommonJS pattern avoiding ES module issues. Active project: [test-coverage-expansion-phase-4-2026-08-20](./.github/projects/active/test-coverage-expansion-phase-4-2026-08-20/). ([PR #2163](https://github.com/lightspeedwp/.github/pull/2163), [#1731](https://github.com/lightspeedwp/.github/issues/1731))
+
 - **Test Coverage Expansion — Phase 3B: Orchestration & Integration Scripts Testing Complete** — Comprehensive test coverage completion for Phase 3B targeting orchestration and integration automation scripts. Phase 3B deliverables include: (1) `pr-triage-orchestrator.test.js` — 39 tests (exceeds 30-test target) covering configuration parsing, PR issue extraction with multiple formats, triage status detection, PR metadata building, summary generation with statistics, and integration workflows for full PR triage pipeline. Comprehensive edge case and error handling coverage; (2) `sync-pr-labels.test.js` — 47 tests (exceeds 30-test target) covering PR number extraction and deduplication, PR validation against constraints (positive numbers, within bounds), label action determination, sync configuration building with multi-option support, issue processing with label change tracking, report generation with summary statistics, and complex multi-issue sync workflows. Includes edge cases for empty/null bodies and mixed valid/invalid PRs; (3) `staging-validation.test.js` — 60 tests (exceeds 30-test target) covering five validation task functions: validateAudit (accuracy validation with configurable count/sample), runPerformanceBench (performance benchmarking with multiple runs and threshold checks), testErrorScenarios (handling of network/rate-limit/permission/malformed scenarios), validateReports (validation of JSON/CSV/Markdown output formats), validateIntegrity (data consistency checks for orphaned/conflicting/duplicate labels). Includes argument parsing, result aggregation, GO/NO-GO determination, and comprehensive edge cases. **Total Phase 3B: 146 tests, 100% passing**. **Overall Phase 3 (A+B): 244 tests, 132% of 185-test target, 100% passing**. All tests follow inline function implementation pattern avoiding ES module import issues. Active project: [test-coverage-expansion-phase-3-2026-08-19](./.github/projects/active/test-coverage-expansion-phase-3-2026-08-19/). ([PR #2154](https://github.com/lightspeedwp/.github/pull/2154))
 
 - **Test Coverage Expansion — Phase 3A: Automation Scripts Testing Complete** — Comprehensive test coverage expansion for Phase 3A targeting critical automation scripts. Phase 3A deliverables include: (1) `allocate-to-milestone.test.js` — 25 tests covering MilestoneAllocator class, constructor initialization, parseLinkedIssues function, isAlreadyAllocated checks, allocatePR/allocateIssue methods, fetchActiveMilestone logic, and complete orchestration with forced milestone override. Full error handling and dry-run mode coverage; (2) `audit-issue-metadata.test.js` — 32 passing tests covering categorizeLabels function (9 tests for label prefix categorization), analyzeIssue function (18 tests for metadata gap detection including missing labels, assignees, milestones, PR links), report generation (2 tests), and configuration parsing (4+ tests); (3) `bulk-issue-metadata-updater.test.js` — 41 passing tests covering mode detection (5 tests: auto, interactive, dry-run), argument parsing (7 tests: --limit, --confidence, --label, --verbose), batch processing (8 tests with confidence thresholds), label management (4 tests), validation (8 tests for config validation), and statistics tracking (7 tests). Total Phase 3A: 98+ tests, 98+ verified passing, >80% code coverage per script. Phase 3B (pr-triage-orchestrator, sync-pr-labels, staging-validation) 146 tests now complete. Active project: [test-coverage-expansion-phase-3-2026-08-19](./.github/projects/active/test-coverage-expansion-phase-3-2026-08-19/). ([PR #2154](https://github.com/lightspeedwp/.github/pull/2154))