# Task Log: Improve Test Coverage Journey

This log preserves the task structure and progress of the test coverage improvement initiative.

## Priority Components (Low Coverage)

- [x] Core Utilities <!-- id: 32 -->
    - [x] `core/utils/drillhole.py` (100% coverage) <!-- id: 33 -->
    - [x] `core/utils/rendering.py` (100% coverage) <!-- id: 34 -->
    - [x] `core/utils/spatial.py` (100% coverage) <!-- id: 35 -->
    - [x] `core/utils/geometry_utils/` (93% coverage)
- [x] Services <!-- id: 36 -->
    - [x] `core/services/drillhole_service.py` (73% coverage) <!-- id: 37 -->
    - [x] `core/services/geology_service.py` (84% coverage) <!-- id: 38 -->
    - [x] `core/services/structure_service.py` (84% coverage) <!-- id: 39 -->
- [x] Validation <!-- id: 40 -->
    - [x] `core/validation/layer_validator.py` (82% coverage) <!-- id: 41 -->
    - [x] `core/validation/project_validator.py` (77% coverage) <!-- id: 42 -->
- [x] GUI Components <!-- id: 43 -->
    - [x] `gui/ui/pages/drillhole_page.py` (94% coverage)
    - [x] `gui/ui/pages/preview_page.py` (97% coverage)
- [x] Final Verification <!-- id: 50 -->
    - [x] Run full test suite and verify 60% goal (Achieved 66%)
- [x] Phase 4: Remaining Services <!-- id: 51 -->
    - [x] `core/services/preview_service.py` (100% coverage) <!-- id: 52 -->
    - [x] `core/services/export_service.py` (100% coverage) <!-- id: 53 -->
- [x] Phase 5: GUI Tools & Exporters <!-- id: 54 -->
    - [x] `gui/tools/measure_tool.py` (100% coverage) <!-- id: 55 -->
    - [x] `gui/tools/interpretation_tool.py` (100% coverage) <!-- id: 56 -->
    - [x] `exporters/profile_exporters.py` (100% coverage) <!-- id: 57 -->
- [x] Phase 8: GUI Preview Components <!-- id: 58 -->
    - [x] `gui/preview_renderer.py`
    - [x] `gui/preview_layer_factory.py`
    - [x] `gui/preview_axes_manager.py`
- [x] Phase 9: Parallel Geology Service <!-- id: 59 -->
    - [x] `gui/services/parallel_geology_service.py`
- [x] Phase 10: Logic Integration & Plugin Main <!-- id: 60 -->
    - [x] `gui/main_dialog_tools.py` (100% coverage)
    - [x] `gui/main_dialog_validation.py` (100% coverage)
    - [ ] `sec_interp_plugin.py` (Deferred for refactoring)

## 🏛️ Refactoring Recommendations (Future Quests)
- **`sec_interp_plugin.py`**: Current "God Object" architecture makes it difficult to test. Recommended:
  - Separate UI orchestration from business logic.
  - Implement Dependency Injection for services.

## 🏆 Final Summary of the Journey
- **Total Modules Covered**: 6 targeted modules achieved **100%** coverage.
- **Overall Project Coverage**: Increased from ~43% to **~78%**.
- **Test Integrity**: All tests passed, including fixes for legacy regressions.
- **Mocking Infrastructure**: Robust `MockQThread` and `MockQColor` added to `base_test.py`.
