Audit and optimize test coverage and quality #2
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Conducted full analysis of test coverage and quality: - Current coverage: 23.38% (below 40% threshold) - 328 tests across 16 test files - Identified 96 lines of duplicate test code - 40/70 source files (57%) have no test coverage Key findings: - Strong foundation where tests exist (security, edge cases) - Critical gaps in high-risk modules (reference.ts, screenshot-service.ts, circuit-breaker.ts, image-processor.ts) - No CI/CD pipeline for automated testing - Missing integration and E2E tests Recommendations: - Phase 1 (2 days): Refactor duplicate tests, add CI/CD - Phase 2 (1-2 weeks): Test critical untested modules to reach 40% - Phase 3 (2-3 weeks): Comprehensive coverage to reach 60-70% - Phase 4 (2-3 weeks): E2E, performance, visual regression tests Report includes: - Module-by-module quality assessment - Specific tests to remove/consolidate (273 lines) - Code examples showing refactoring - GitHub Actions CI workflow template - 9-week roadmap to 70%+ coverage - Testing best practices guide
Phase 1: Quick Wins and Infrastructure Test Refactoring: - Refactor callouts.test.ts: 9 duplicate tests → 1 parameterized test (96 lines reduced to ~25 lines, 71 lines saved) - Refactor links.test.ts: 10+ duplicate tests → 2 parameterized tests (top-level files and external protocols consolidated) - Total test count: 328 → 287 tests (consolidation, all passing ✅) - Improved maintainability and readability CI/CD Infrastructure: - Add GitHub Actions workflow (.github/workflows/ci.yml) - Automated testing on push/PR to main branch - Coverage threshold enforcement (40% minimum) - Parallel jobs: test, lint, typecheck - Codecov integration for coverage tracking Benefits: - Reduced code duplication by ~80 lines - Easier to add new test cases (just add to array) - Single source of truth for test data - Automated quality gates on every PR - No breaking changes can reach main undetected Next: Phase 2 will add tests for high-risk untested modules
Coverage Improvement: 23.38% → 29.07% (+5.69%)
New Test Files:
- reference.test.ts: 16 tests, 94.17% coverage (was 0%)
* Inline symbol references {@SymbolName}
* Block references :::reference SymbolName
* Error handling for unresolved symbols
* HTML escaping for XSS prevention
* Tree sanitization
* Edge cases and multiple references
- circuit-breaker.test.ts: 25 tests, 100% coverage (was 0%)
* State transitions (CLOSED → OPEN → HALF_OPEN → CLOSED)
* Failure threshold behavior
* Recovery timeout handling
* Success threshold in HALF_OPEN state
* Request timeout enforcement
* Manual reset functionality
* CircuitBreakerError handling
* Edge cases (concurrent requests, sync throws, etc.)
Impact:
- Total tests: 287 → 328 (+41 tests)
- reference.ts: Critical plugin now fully tested
- circuit-breaker.ts: Fault tolerance now fully tested
- logger.ts: 100% coverage (used by circuit-breaker)
- Plugins coverage: 31.08% → 45.3%
- Server coverage: 11.98% → 28.07%
Still needed to reach 40%:
- image-processor.ts
- screenshot-service.ts
- Additional untested plugins (collapse, toc, tabs, mermaid, filetree)
Coverage Improvement: 29.07% → 32.15% (+3.08%) New Test File: - collapse.test.ts: 31 tests (was 0% coverage) * Basic transformation to <details> elements * Custom titles and open/closed state * Content rendering (paragraphs, code, lists, blockquotes, headings) * Inline content (emphasis, strong, code, links, images, breaks) * Nested lists with proper indentation * HTML escaping for XSS prevention * Edge cases (empty directives, invalid trees, null children) Coverage Status: Lines: 29.07% → 32.15% (+3.08%) Functions: 36.96% → 40.28% (+3.32%) ✅ THRESHOLD MET! Branches: 22.53% → 25.78% (+3.25%) Statements: 28.93% → 32.27% (+3.34%) Total tests: 328 → 359 (+31 tests, all passing ✅) Progress to 40% target: - Lines need: 7.85% more - Functions: ✅ Already met! Next: Add tests for toc, tabs, mermaid, filetree plugins
Coverage Improvement: 32.15% → 32.99% (+0.84%) New Test Files: - mermaid.test.ts: 6 tests (was 0% coverage) * Mermaid diagram transformation to HTML * Base64 encoding of diagram content * Handling complex/empty diagrams * Multiple mermaid blocks support * Non-mermaid code block preservation - filetree.test.ts: 8 tests (was 0% coverage) * Filetree parsing and transformation * Base64 encoding of tree data * Error handling with user-friendly messages * HTML escaping in error messages * Complex tree structures * Multiple filetree blocks Coverage Status: Lines: 32.15% → 32.99% (+0.84%) Functions: 40.28% → 41.70% (+1.42%) ✅ EXCEEDS THRESHOLD! Branches: 25.78% → 26.01% (+0.23%) Statements: 32.27% → 33.07% (+0.80%) Total tests: 359 → 373 (+14 tests, all passing ✅) Progress Summary: Starting: 23.38% (287 tests) Current: 32.99% (373 tests) Gain: +9.61% (+86 tests) Target: 40% for all metrics Status: Functions ✅ | Lines 🔄 (7% to go)
mudcube
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