Add comprehensive tests for filtering and import/export functionality

- Created `test_filters.py` to test the EntryFilter and FilterOptions classes, covering default values, custom values, filtering by status, DNS type, resolution status, and search functionality.
- Implemented tests for combined filters and edge cases in filtering.
- Added `test_import_export.py` to test the ImportExportService class, including exporting to hosts, JSON, and CSV formats, as well as importing from these formats.
- Included tests for handling invalid formats, missing required columns, and warnings during import.
- Updated `uv.lock` to include `pytest-asyncio` as a dependency for asynchronous testing.
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Philip Henning 2025-08-18 10:32:52 +02:00
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# Active Context: hosts
# Active Context
## Current Work Focus
## Current Status: Phase 4 Completed Successfully! 🎉
**Phase 4 Advanced Edit Features Complete**: Successfully implemented all Phase 4 features including add/delete entries, inline editing, search functionality, and comprehensive undo/redo system. The application now has complete edit capabilities with modular TUI architecture, command pattern implementation, and professional user interface. Ready for Phase 5 advanced features.
**Last Updated:** 2025-01-17 22:26 CET
## Immediate Next Steps
## Recent Achievement
Successfully completed **Phase 4: Import/Export System** implementation! All 279 tests are now passing, representing a major milestone in the hosts TUI application development.
### Priority 1: Phase 5 Advanced Features
1. **DNS resolution**: Resolve hostnames to IP addresses with comparison
2. **CNAME support**: Store DNS names alongside IP addresses
3. **Advanced filtering**: Filter by active/inactive status
4. **Import/Export**: Support for different file formats
### Phase 4 Implementation Summary
- ✅ **Complete Import/Export Service** (`src/hosts/core/import_export.py`)
- Multi-format support: HOSTS, JSON, CSV
- Comprehensive validation and error handling
- DNS entry support with proper validation workarounds
- Export/import roundtrip data integrity verification
- File format auto-detection and path validation
### Priority 2: Phase 6 Polish
1. **Bulk operations**: Select and modify multiple entries
2. **Performance optimization**: Testing with large hosts files
3. **Accessibility**: Screen reader support and keyboard accessibility
- ✅ **Comprehensive Test Coverage** (`tests/test_import_export.py`)
- 24 comprehensive tests covering all functionality
- Export/import roundtrips for all formats
- Error handling for malformed files
- DNS entry creation with validation workarounds
- All tests passing with robust error scenarios covered
## Recent Changes
- ✅ **DNS Entry Validation Fix**
- Resolved DNS entry creation issues in import methods
- Implemented temporary IP workaround for DNS-only entries
- Fixed class name issues (`HostsParser` vs `HostsFileParser`)
- Fixed export method to use parser serialization properly
### Status Appearance Enhancement ✅ COMPLETED
Successfully implemented the user's requested status display improvements:
## Current System Status
- **Total Tests:** 279 passed, 5 warnings (non-critical async mock warnings)
- **Test Coverage:** Complete across all core modules
- **Code Quality:** All ruff checks passing
- **Architecture:** Clean, modular, well-documented
**New Header Layout:**
- **Title**: Changed from "Hosts Manager" to "/etc/hosts Manager"
- **Subtitle**: Now shows "29 entries (6 active) | Read-only mode" format
- **Error Messages**: Moved to dedicated status bar below header as overlay
## Completed Phases
1. ✅ **Phase 1: DNS Resolution Foundation** - DNS service, fields, and comprehensive testing
2. ✅ **Phase 2: DNS Integration** - TUI integration, status widgets, and real-time updates
3. ✅ **Phase 3: Advanced Filtering** - Status-based, DNS-type, and search filtering with presets
4. ✅ **Phase 4: Import/Export System** - Multi-format import/export with validation and testing
**Overlay Status Bar Implementation:**
- **Fixed layout shifting issue**: Status bar now appears as overlay without moving panes down
- **Corrected positioning**: Status bar appears below header as overlay using CSS positioning
- **Visible error messages**: Error messages display correctly as overlay on content area
- **Professional appearance**: Error bar overlays cleanly below header without disrupting layout
## Next Phase: Phase 5 - DNS Name Support
Focus on enhancing entry modals and editing functionality to fully support DNS names alongside IP addresses:
### Entry Details Consistency ✅ COMPLETED
Successfully implemented DataTable-based entry details with consistent field ordering:
### Phase 5 Priorities
1. **Update AddEntryModal** (`src/hosts/tui/add_entry_modal.py`)
- Add DNS name field option
- Implement mutual exclusion logic (IP vs DNS name)
- Add field deactivation when DNS name is present
**Key Improvements:**
- **Replaced Static widget with DataTable**: Entry details now displayed in professional table format
- **Consistent field order**: Details view now matches edit form order exactly
1. IP Address
2. Hostnames (comma-separated)
3. Comment
4. Active status (Yes/No)
- **Labeled rows**: Uses DataTable labeled rows feature for clean presentation
- **Professional appearance**: Table format matching main entries table
2. **Enhance EditHandler** (`src/hosts/tui/edit_handler.py`)
- Support DNS name editing
- IP field deactivation logic
- Enhanced validation for DNS entries
### Phase 4 Undo/Redo System ✅ COMPLETED
Successfully implemented comprehensive undo/redo functionality using the Command pattern:
3. **Parser DNS Metadata** (`src/hosts/core/parser.py`)
- Handle DNS name metadata in hosts file comments
- Preserve DNS information during file operations
**Command Pattern Implementation:**
- **Abstract Command class**: Base interface with execute/undo methods and operation descriptions
- **OperationResult dataclass**: Standardized result handling with success, message, and optional data
- **UndoRedoHistory manager**: Stack-based operation history with configurable limits (default 50 operations)
- **Concrete command classes**: Complete implementations for all edit operations:
- ToggleEntryCommand: Toggle active/inactive status with reversible operations
- MoveEntryCommand: Move entries up/down with position restoration
- AddEntryCommand: Add entries with removal capability for undo
- DeleteEntryCommand: Remove entries with restoration capability
- UpdateEntryCommand: Modify entry fields with original value restoration
4. **Validation Improvements**
- Enhanced mutual exclusion validation
- DNS name format validation
- Error handling for invalid combinations
**Integration and User Interface:**
- **HostsManager integration**: All edit operations now use command pattern with execute/undo methods
- **Keyboard shortcuts**: Ctrl+Z for undo, Ctrl+Y for redo operations
- **UI feedback**: Status bar shows undo/redo availability and operation descriptions
- **History management**: Operations cleared on edit mode exit, failed operations not stored
- **Comprehensive testing**: 43 test cases covering all command operations and edge cases
## Technical Architecture Status
- **DNS Resolution Service:** Fully operational with background/manual refresh
- **Advanced Filtering:** Complete with preset management
- **Import/Export:** Multi-format support with comprehensive validation
- **TUI Integration:** Professional interface with modal dialogs
- **Data Models:** Enhanced with DNS fields and validation
- **Test Coverage:** Comprehensive across all modules
### Phase 3 Edit Mode Complete ✅ COMPLETE
- ✅ **Permission management**: Complete PermissionManager class with sudo request and validation
- ✅ **Edit mode toggle**: Safe transition between read-only and edit modes with 'e' key
- ✅ **Entry modification**: Toggle active/inactive status and reorder entries safely
- ✅ **File safety**: Automatic backup system with timestamp naming before modifications
- ✅ **Save confirmation modal**: Professional modal dialog for save/discard/cancel decisions
- ✅ **Change detection system**: Intelligent tracking of modifications
- ✅ **Comprehensive testing**: All 149 tests passing with edit functionality
## Key Technical Insights
- DNS entry creation requires temporary IP workaround due to validation constraints
- Parser class naming conventions are critical for import functionality
- Export/import roundtrip validation ensures data integrity
- Background DNS resolution integrates seamlessly with TUI updates
- Filter system handles complex DNS entry scenarios effectively
### Phase 2 Advanced Read-Only Features ✅ COMPLETE
- ✅ **Configuration system**: Complete Config class with JSON persistence
- ✅ **Configuration modal**: Professional modal dialog for settings management
- ✅ **Default entry filtering**: Hide/show system default entries
- ✅ **Complete sorting system**: Sort by IP address and hostname with visual indicators
- ✅ **Rich visual interface**: Color-coded entries with professional DataTable styling
- ✅ **Interactive column headers**: Click headers to sort data
## Current Project State
### Production Application Status
- **Fully functional TUI**: `uv run hosts` launches polished application with advanced Phase 4 features
- **Complete edit capabilities**: Add/delete/edit entries, search functionality, and comprehensive modals
- **Advanced TUI architecture**: Modular handlers (table, details, edit, navigation) with professional interface
- **Near-complete test coverage**: 147 of 150 tests passing (98% success rate, 3 minor test failures)
- **Clean code quality**: All ruff linting and formatting checks passing
- **Robust modular architecture**: Handler-based design ready for Phase 5 advanced features
### Memory Bank Update Summary
All memory bank files have been reviewed and updated to reflect current state:
- ✅ **activeContext.md**: Updated with current completion status and next steps
- ✅ **progress.md**: Corrected test status and development stage
- ✅ **techContext.md**: Updated development workflow and current state
- ✅ **projectbrief.md**: Confirmed project foundation and test status
- ✅ **systemPatterns.md**: Validated architecture and implementation patterns
- ✅ **productContext.md**: Confirmed product goals and user experience
## Active Decisions and Considerations
### Architecture Decisions Validated
- ✅ **Layered architecture**: Successfully implemented with clear separation and extensibility
- ✅ **Reactive UI**: Textual's reactive system working excellently with complex state
- ✅ **Data models**: Dataclasses with validation proving robust and extensible
- ✅ **File parsing**: Comprehensive parser handling all edge cases flawlessly
- ✅ **Configuration system**: JSON-based persistence working reliably
- ✅ **Modal system**: Professional dialog system with proper keyboard handling
- ✅ **Permission management**: Secure sudo handling with proper lifecycle management
### Design Patterns Implemented
- ✅ **Reactive patterns**: Using Textual's reactive attributes for complex state management
- ✅ **Data validation**: Comprehensive validation in models, parser, and configuration
- ✅ **Error handling**: Graceful degradation and user feedback throughout
- ✅ **Modal pattern**: Professional modal dialogs with proper lifecycle management
- ✅ **Configuration pattern**: Centralized settings with persistence and defaults
- ✅ **Command pattern**: Implemented for edit operations with save confirmation
- ✅ **Permission pattern**: Secure privilege escalation and management
- 🔄 **Observer pattern**: Will implement for advanced state change notifications
## Important Patterns and Preferences
### Code Quality Standards
- **Zero tolerance for linting issues**: All ruff checks must pass before commits
- **Comprehensive testing**: Maintain 100% test pass rate with meaningful coverage
- **Type safety**: Full type hints throughout codebase
- **Documentation**: Clear docstrings and inline comments for complex logic
- **Error handling**: Graceful degradation with informative user feedback
### Development Workflow
- **Test-driven development**: Write tests before implementing features
- **Incremental implementation**: Small, focused changes with immediate testing
- **Clean commits**: Each commit should represent a complete, working feature
- **Memory bank maintenance**: Update documentation after significant changes
### User Experience Priorities
- **Safety first**: Read-only by default, explicit edit mode with confirmation
- **Keyboard-driven**: Efficient navigation without mouse dependency
- **Visual clarity**: Clear active/inactive indicators and professional styling
- **Error prevention**: Validation before any file writes
- **Intuitive interface**: Consistent field ordering and professional presentation
## Learnings and Project Insights
### Technical Insights
- **Textual framework excellence**: Reactive system, DataTable, and modal system exceed expectations
- **Configuration system design**: JSON persistence with graceful error handling works perfectly
- **Visual design importance**: Color-coded entries and professional styling significantly improve UX
- **Modal dialog system**: Professional modal interface enhances user experience significantly
- **Permission management**: Secure sudo handling requires careful lifecycle management
- **File operations**: Atomic operations and backup systems essential for system file modification
### Process Insights
- **Memory bank value**: Documentation consistency crucial for maintaining project context
- **Testing strategy**: Comprehensive test coverage enables confident refactoring and feature addition
- **Code quality**: Automated linting and formatting tools essential for maintaining standards
- **Incremental development**: Small, focused phases enable better quality and easier debugging
- **User feedback integration**: Implementing user-requested improvements enhances adoption
### Architecture Success Factors
- ✅ **Layered separation**: Clean boundaries enable easy feature addition
- ✅ **Reactive state management**: Textual's system handles complex UI updates elegantly
- ✅ **Comprehensive validation**: All data validated before processing prevents errors
- ✅ **Professional visual design**: Rich styling provides clear feedback and professional appearance
- ✅ **Robust foundation**: Clean architecture easily extended with advanced features
- ✅ **Configuration flexibility**: User preferences persist and enhance workflow
## Current Development Environment
### Tools Working Perfectly
- ✅ **uv**: Package manager handling all dependencies flawlessly
- ✅ **ruff**: Code quality tool with all checks passing
- ✅ **Python 3.13**: Runtime environment performing excellently
- ✅ **textual**: TUI framework exceeding expectations with rich features
- ✅ **pytest**: Testing framework with comprehensive 149-test suite
### Development Workflow Established
- ✅ **uv run hosts**: Launches application instantly with full functionality
- ✅ **uv run pytest**: Comprehensive test suite execution with 100% pass rate
- ✅ **uv run ruff check**: Code quality validation with clean results
- ✅ **uv run ruff format**: Automatic code formatting maintaining consistency
### Project Structure Complete
- ✅ **Package structure**: Proper src/hosts/ organization implemented
- ✅ **Core modules**: models.py, parser.py, config.py, manager.py fully functional
- ✅ **TUI implementation**: Complete application with advanced features
- ✅ **Test coverage**: Comprehensive test suite for all components
- ✅ **Entry point**: Configured hosts command working perfectly
## Technical Constraints Confirmed
### System Integration
- ✅ **Root access handling**: Secure sudo management implemented
- ✅ **File integrity**: Parser preserves all comments and structure perfectly
- ✅ **Cross-platform compatibility**: Unix-like systems (Linux, macOS) working properly
- ✅ **Permission management**: Safe privilege escalation and release
### Performance Validated
- ✅ **Fast startup**: TUI loads quickly even with complex features
- ✅ **Responsive UI**: No blocking operations in main UI thread
- ✅ **Memory efficiency**: Handles typical hosts files without issues
- 🔄 **Large file performance**: Will be tested and optimized in Phase 4
### Security Confirmed
- ✅ **Privilege escalation**: Only request sudo when entering edit mode
- ✅ **Input validation**: Comprehensive validation of IP addresses and hostnames
- ✅ **Backup strategy**: Automatic backups before modifications implemented
- ✅ **Permission dropping**: Sudo permissions managed with proper lifecycle
This active context accurately reflects the current state: a production-ready application with complete edit mode functionality, professional UX enhancements, and comprehensive test coverage. The project is perfectly positioned for Phase 4 advanced edit features implementation.
## Development Patterns Established
- Test-Driven Development with comprehensive coverage
- Modular architecture with clear separation of concerns
- Consistent error handling and validation patterns
- Professional TUI design with modal dialogs
- Clean async integration for DNS operations