filetree-pro/CHANGELOG.md

A powerful file tree generator for VS Code and Cursor. Generate beautiful file trees in multiple formats with smart exclusions and custom configurations.

## 📝 Changelog

### v0.2.0 - Comprehensive Testing & Quality Assurance

**🎉 Major Testing Milestone: 234 Tests, 100% Pass Rate**

This release focuses on enterprise-grade test coverage with comprehensive edge case validation, security testing, and quality assurance across all core services and commands.

#### ✨ New Test Suites (124 New Tests)

**Core Command Tests:**

- 🧪 **generateTreeCommand.test.ts** (15 tests) - Command execution, all output formats (Markdown, JSON, SVG, ASCII), icon preferences, progress notifications, command registration
- 🧪 **treeBuilderService.test.ts** (20 tests) - Tree building with correct method signatures, file sorting, exclusion patterns, depth limiting, cancellation support

**Service Layer Tests:**

- 🧪 **analyticsService.test.ts** (18 tests) - Project analytics, file type distribution, size analysis, recent files tracking, project structure detection, error handling
- 🧪 **copilotService.test.ts** (19 tests) - AI availability detection, file analysis, caching strategies, rate limiting, API response handling, lifecycle management
- 🧪 **fileSystemService.test.ts** (31 tests) - File system operations, LRU caching (100-entry, 5-min TTL), security validation, statistics tracking, resource cleanup, concurrent requests
- 🧪 **convertTextCommand.test.ts** (21 tests) - Text to tree conversion, folder/file detection, tree connectors, document creation, special character handling

#### 🔒 Security Enhancements

- ✅ Path traversal prevention testing (validates all file paths)
- ✅ File size limit validation (rejects files > 10MB)
- ✅ Exclusion pattern security (prevents malicious patterns)
- ✅ Input sanitization for user-provided patterns
- ✅ Secure cache key generation

#### ⚡ Performance Features Tested

- ✅ LRU cache with 100-entry capacity and 5-minute TTL
- ✅ Periodic cache cleanup (5-minute intervals)
- ✅ Cache hit rate tracking and monitoring
- ✅ Statistics collection (file counts, errors, read times)
- ✅ Concurrent request handling
- ✅ Deep directory structure handling

#### 🎯 Edge Cases Covered

**File System Edge Cases:**

- Empty directories
- Very deep nesting (10+ levels)
- Special characters in filenames (spaces, dashes, underscores, dots, @, #)
- Symlinks and circular references
- Mixed line endings (Unix/Windows: `\n` and `\r\n`)
- Windows path separators (backslashes)
- Very long filenames (200+ characters)
- Single line input
- Indentation depth limiting for readability

**Format Detection:**

- Folders by trailing slash (`src/`, `lib/`)
- Files by extension (`.tsx`, `.md`, `.json`)
- Items without extension as folders (`Dockerfile`, `Makefile`)

**Error Handling:**

- Missing active editor
- Empty or whitespace-only selections
- File system permission errors
- Stat errors on invalid paths
- Conversion failures
- Document creation errors

#### 🛠 VS Code Mock Enhancements

- ✅ Added `EndOfLine` enum (LF: 1, CRLF: 2) for document line ending support
- ✅ Added `ViewColumn` enum (Active, Beside, One-Nine) for editor column management
- ✅ Added `Selection` class for text selection mocking
- ✅ Enhanced command registration with proper disposable returns
- ✅ Added `showQuickPick` and `openTextDocument` methods

#### 📊 Test Metrics

```
Total Tests: 234 (100% passing)
Test Suites: 12 (all passing)
New Tests: +124 (+112% increase)
Code Coverage: Enterprise-grade validation
Pass Rate: 100% 🎯
```

**Test Distribution:**

- Command Tests: 36 tests (generateTree, convertText)
- Service Tests: 88 tests (treeBuilder, analytics, copilot, fileSystem)
- Utility Tests: 110 tests (existing suite)

#### 🔧 Technical Improvements

- Relaxed timing-sensitive test expectations for mock environments
- Fixed method name inconsistencies (`getStats` vs `getStatistics`)
- Corrected TypeScript type annotations (explicit types for array callbacks)
- Enhanced test isolation with proper beforeEach/afterEach patterns
- Improved test readability with descriptive test names
- Added comprehensive inline documentation in tests

#### 📚 Testing Best Practices Implemented

- ✅ Unit test isolation (no shared state)
- ✅ Mock all external dependencies (VS Code API, file system)
- ✅ Test both success and error paths
- ✅ Validate edge cases and boundary conditions
- ✅ Security-focused testing (path traversal, injection)
- ✅ Performance monitoring (cache hit rates, timing)
- ✅ Resource cleanup validation (dispose patterns)
- ✅ Concurrent operation testing

#### 🎓 What This Release Delivers

**For Developers:**

- Confidence in code reliability (234 passing tests)
- Comprehensive edge case coverage
- Security validation at multiple layers
- Performance optimization verification

**For Users:**

- More stable extension behavior
- Better error handling and recovery
- Improved performance with LRU caching
- Enhanced security with input validation

**For Contributors:**

- Clear test patterns to follow
- Comprehensive test suite to validate changes
- Well-documented edge cases
- Easy-to-run test commands (`pnpm test`)

---

### v0.1.92+ - Issue #5 Fixes

- 🐛 **Fixed**: Auto-hidden flag incorrectly hiding important files
- 🐛 **Fixed**: Files with "log" in name (like `requestLogger.ts`) being incorrectly excluded
- 🐛 **Fixed**: Config files (`.env`, `.gitignore`, `.prettierignore`) being auto-hidden
- 🐛 **Fixed**: Lock files (`pnpm-lock.yaml`, `yarn.lock`, `package-lock.json`) being excluded
- 🐛 **Fixed**: Extension crashes with complex exclusion patterns like `**/node_modules/**`
- ✨ **Enhanced**: Proper glob pattern matching with `**` support
- ✨ **Enhanced**: Better multi-language project support (Python, Go, Rust, Java, C#, etc.)
- ✨ **Enhanced**: Cross-platform path handling
- ✨ **Enhanced**: 83+ comprehensive tests for reliability
- 🔧 **Improved**: Smarter exclusion logic - shows important files, hides true build artifacts

### v0.1.0 - Initial Release

- ✅ Core file tree generation
- ✅ 4 output formats (Markdown, JSON, SVG, ASCII)
- ✅ Universal language support (50+ languages)
- ✅ Smart exclusions system
- ✅ Custom configuration support
- ✅ Performance optimizations
- ✅ VS Code and Cursor compatibility