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

# 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/