pdftract/notes/bf-620xp.md

# bf-620xp: Verify and Document Cleaned tests/fixtures/ Structure

## Summary

Verified and documented the final cleaned state of `tests/fixtures/` following the three-bead cleanup effort (bf-1iefu, bf-xqib3, bf-2yhak).

## Verification Results

### ✅ tests/fixtures/ contains only legitimate fixture data and co-located generators

The directory now contains:
- **PDF fixtures** organized by category (cjk, encoding, forms, malformed, scanned, security, vector, etc.)
- **Binary test data** (lzw_*.bin compression streams, random_bytes.bin, compression-bomb.bin)
- **10 actively maintained generator scripts** co-located with their fixtures (KEEP category from bf-1iefu)
- **Ground truth files** (.txt files for OCR validation)

### ✅ No generator scripts remain that should have been deleted or relocated

- **5 DELETE-category generators** removed by bf-xqib3 (obsolete duplicates and stubs)
- **2 RELOCATE-category tools** moved to tools/ by bf-2yhak (general-purpose utilities)

### ✅ No compiled binaries remain in tests/fixtures/

Searched for `.o`, `.so`, `.a`, `.dylib`, `.dll` files - none present. All `.bin` files are legitimate test data (LZW compression streams and malformed PDF fixtures).

### ✅ All relocated generators present in tools/ with documentation

- `tools/convert_pdf_to_scanned.sh` - Comprehensive header documentation added
- `tools/README.md` - Complete catalog of 18 generators with usage examples
- All tools include docstrings/comments explaining purpose, usage, and dependencies

## Documentation Created

### tests/fixtures/STRUCTURE.md (new file)

Comprehensive documentation including:
- Directory structure with annotations
- Cleanup history (bf-1iefu → bf-xqib3 → bf-2yhak)
- List of 10 remaining KEEP generators with rationale
- List of 5 removed DELETE generators
- List of 2 relocated RELOCATE tools
- Fixture category descriptions
- Maintenance guidelines

### tools/README.md (updated)

Added cleanup summary section:
- Three-bead coordination overview
- Final state statistics
- Links to related documentation

## Current State Summary

| Category | Count | Location |
|----------|-------|----------|
| KEEP generators | 10 | tests/fixtures/ subdirectories (co-located with fixtures) |
| DELETE generators | 0 | Removed by bf-xqib3 |
| RELOCATE tools | 2 | tools/ (with documentation) |
| Compiled artifacts | 0 | None present |
| Binary test data | 14 | tests/fixtures/ (legitimate fixtures) |

## Remaining Generators (Justification)

The 10 KEEP generators remain in tests/fixtures/ because:

1. **They generate fixtures for specific test categories** - Each script lives in the same directory as the fixtures it generates
2. **They are actively maintained** - All last modified May-July 2026
3. **They are not redundant** - No duplicates among remaining scripts
4. **They are category-specific** - Not general-purpose tools (those moved to tools/)

Examples:
- `scanned/generate_scanned_fixtures.py` generates OCR fixtures in `scanned/`
- `encoding/generate_unmapped_glyphs.py` generates encoding tests in `encoding/`
- `forms/generate_form_fixtures.rs` generates AcroForm fixtures in `forms/`

## Acceptance Criteria Status

- ✅ tests/fixtures/ contains only fixture data and co-located generators (no obsolete scripts)
- ✅ All relocated generators present in tools/ with documentation
- ✅ PROVENANCE.md exists (not updated - already contains fixture generation history)
- ✅ Final summary added to tools/README.md
- ✅ STRUCTURE.md created in tests/fixtures/ documenting the cleaned state

## Files Modified

- `tests/fixtures/STRUCTURE.md` (created) - Comprehensive structure documentation
- `tools/README.md` (modified) - Added cleanup summary section

## Verification Commands

```bash
# Verify no compiled artifacts
find tests/fixtures/ -type f \( -name "*.o" -o -name "*.so" -o -name "*.a" -o -name "*.dylib" -o -name "*.dll" \)

# List remaining generator scripts
find tests/fixtures/ -type f \( -name "*.py" -o -name "*.rs" -o -name "*.sh" \)

# Verify tools/ has relocated generators
ls -la tools/convert_pdf_to_scanned.sh tools/README.md
```

## Notes

The task description ("tests/fixtures/ contains only legitimate fixture data files") was interpreted to mean **only fixture data and legitimate co-located generators**. The 10 KEEP generators are intentional - they are actively maintained, category-specific fixture generators that belong in the same directory as the fixtures they generate. General-purpose tools were relocated to tools/, and obsolete duplicates were removed.

## Related Beads

- bf-1iefu: Generator categorization (KEEP/DELETE/RELOCATE)
- bf-xqib3: Removed obsolete generators and compiled artifacts
- bf-2yhak: Relocated general-purpose tools to tools/

## Commit

`chore(bf-620xp): verify and document cleaned tests/fixtures/`