# Test Assets Matrix - Completion Summary

## ✅ Task Completed Successfully

All 47 test assets have been created and the `tests/assets_matrix_template.yaml` has been fully populated with file paths.

## 📊 Asset Breakdown

### Photo Variants (4 files)

- ✓ P001_photo_good.jpg (46KB) - JPEG with EXIF dates
- ✓ P002_photo_missing_exif.jpg (46KB) - JPEG without date metadata
- ✓ P003_photo_wrong_ext.png (46KB) - JPEG with .png extension
- ✓ P004_photo_missing_exif_wrong_ext.png (46KB) - JPEG without EXIF, .png extension

### Video Variants (4 files)

- ✓ V001_video_good.mov (55KB) - MOV with creation metadata
- ✓ V002_video_missing_exif.mov (52KB) - MOV without timestamps
- ✓ V003_video_wrong_ext.avi (55KB) - MOV with .avi extension
- ✓ V004_video_missing_exif_wrong_ext.mp4 (52KB) - MOV without metadata, .mp4 extension

### Live Photo Pairs (32 files = 16 pairs)

All 16 permutations created covering:

- Photo missing_exif: true/false
- Photo wrong_extension: true/false
- Video missing_exif: true/false
- Video wrong_extension: true/false

Files: L001_live_photo.jpg + L001_live_video.mov through L016_live_photo.jpg + L016_live_video.mp4

### Edge Cases (7 files)

- ✓ E001_photo_checksum_mismatch.jpg (46KB)
- ✓ E002_photo_corrupted.jpg (20KB truncated)
- ✓ E003_orphan_live_video.mov (3.2MB)
- ✓ E004_photo_ünícødé_@_#.jpg (46KB) - Special characters
- ✓ E005_photo_with_sidecar.jpg (46KB)
- ✓ E005_photo_with_sidecar.xmp (466B) - XMP sidecar
- ✓ E006_photo_exiftool_fail.jpg (46KB)

## 🔧 Manipulation Techniques Used

1. **EXIF Date Injection**: `exiftool -DateTimeOriginal="..." -CreateDate="..." file.jpg`
2. **EXIF Date Removal**: `exiftool -DateTimeOriginal= -CreateDate= -ModifyDate= file.jpg`
3. **Video Metadata**: `exiftool -CreateDate= -MediaCreateDate= -TrackCreateDate= file.mov`
4. **Extension Mismatch**: `cp file.jpg file.png` (JPEG content with PNG extension)
5. **File Corruption**: `dd if=file.jpg of=corrupted.jpg bs=1024 count=20` (truncate)
6. **XMP Sidecar**: Manual XML creation with date metadata

## 📁 File Structure

```
tests/
├── assets/
│   ├── README.md                          # Documentation
│   ├── P001_photo_good.jpg                # Photo variants (4)
│   ├── P002_photo_missing_exif.jpg
│   ├── P003_photo_wrong_ext.png
│   ├── P004_photo_missing_exif_wrong_ext.png
│   ├── V001_video_good.mov                # Video variants (4)
│   ├── V002_video_missing_exif.mov
│   ├── V003_video_wrong_ext.avi
│   ├── V004_video_missing_exif_wrong_ext.mp4
│   ├── L001_live_photo.jpg                # Live photo pairs (32)
│   ├── L001_live_video.mov
│   ├── ... (L002-L016 pairs)
│   ├── E001_photo_checksum_mismatch.jpg   # Edge cases (7)
│   ├── E002_photo_corrupted.jpg
│   ├── E003_orphan_live_video.mov
│   ├── E004_photo_ünícødé_@_#.jpg
│   ├── E005_photo_with_sidecar.jpg
│   ├── E005_photo_with_sidecar.xmp
│   └── E006_photo_exiftool_fail.jpg
├── assets_matrix_template.yaml            # ✅ FULLY POPULATED
├── contract/
├── integration/
└── unit/
```

## 🎯 Test Coverage Dimensions

The asset matrix provides comprehensive coverage for:

1. **EXIF Date Handling**
   - Present vs Missing
   - Injection requirements
   - Checksum override tracking

2. **File Extension Normalization**
   - Correct vs Incorrect extensions
   - MIME-based correction
   - Extension preservation after EXIF injection

3. **Live Photo Pairing**
   - Complete pairs
   - Missing components (orphans)
   - Cross-product of photo/video conditions
   - Reordering and batch handling

4. **Error Scenarios**
   - Checksum mismatches
   - Corrupted files
   - Special character handling
   - External metadata (XMP sidecars)
   - Tool failures (exiftool)

5. **File Types**
   - JPEG photos
   - HEIC (via conversion)
   - MOV videos (QuickTime)
   - MP4 videos
   - AVI containers

## 🧪 Next Steps for Testing

1. **Install test dependencies** (if not already done):

   ```bash
   pip install pytest pytest-asyncio pytest-mock pyyaml respx httpx
   ```

2. **Create pytest fixture** in `tests/conftest.py`:

   ```python
   import yaml
   import pytest
   from pathlib import Path

   @pytest.fixture(scope='session')
   def assets_matrix():
       yaml_path = Path(__file__).parent / 'assets_matrix_template.yaml'
       with open(yaml_path) as f:
           data = yaml.safe_load(f)
       return data['test_cases']
   ```

3. **Write parametrized tests**:

   ```python
   @pytest.mark.parametrize('case', assets_matrix(), ids=lambda c: c['id'])
   def test_photo_handling(case):
       if case['type'] != 'photo':
           pytest.skip()
       # Test logic using case['photo']['path'], etc.
   ```

4. **Mock external dependencies**:
   - Immich API calls (use `respx`)
   - Subprocess calls to exiftool/immich-cli (use `pytest-mock`)
   - File downloads (return local assets)

## ✅ Verification

All 47 asset files verified present:

```bash
cd tests/assets
ls -1 P00* V00* L0* E00* | wc -l  # Output: 47
```

All YAML paths verified:

```bash
grep 'path: ""' tests/assets_matrix_template.yaml | wc -l  # Output: 0 (all filled)
```

## 📝 Notes

- Assets are **real files**, not synthetic mocks, ensuring tests catch actual issues
- Live photo pair sourced from user's real Apple device (IMG_2950.HEIC/MOV)
- Base photos from Wikimedia Commons (public domain)
- Videos generated with ffmpeg test patterns
- Total asset directory size: ~15MB (acceptable for CI/CD)
- All metadata manipulation done with exiftool 12.76+

## 🔗 References

- Asset matrix: `tests/assets_matrix_template.yaml`
- Asset documentation: `tests/assets/README.md`
- Original spec: `specs/001-migrate-immich-server/plan.md`
