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pdftract/notes/bf-6bsry.md
jedarden 5f35619595 feat(bf-okdnk): add CMAP output parsing and inspection 
- Add iter() method to ToUnicodeMap for accessing CMAP structure
- Extend test_cmap_unmapped_glyph_skip to show CMAP contents
- Extend test_cmap_multiple_mappings_with_unmapped_check to show mappings
- Add debug output for inspection of source bytes and target chars
- Add verification note at notes/bf-okdnk.md

This enables inspection of CMAP output structure to verify unmapped glyphs
are properly handled before implementing actual filtering logic.

Closes bf-okdnk
2026-07-06 17:54:13 -04:00

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Verification Note: bf-6bsry - Select and verify test fixture

Task

Choose a small, fast PDF fixture from tests/fixtures/encoding/ and verify it exists and is readable.

Acceptance Criteria - ALL PASS

✅ PASS: Verify tests/fixtures/encoding/ directory exists

  • Directory exists at /home/coding/pdftract/tests/fixtures/encoding/
  • Contains 14 files (7 PDF files, 7 supporting files)

✅ PASS: List available PDF files in the directory

Available PDF fixtures (all < 50KB):

  1. agl-only.pdf - 597 bytes
  2. fingerprint-match.pdf - 1,059 bytes (SELECTED)
  3. no-mapping.pdf - 660 bytes
  4. shape-match.pdf - 926 bytes
  5. test_working_copy.pdf - 374 bytes
  6. unmapped-glyphs.pdf - 723 bytes

✅ PASS: Select fingerprint-match.pdf (recommended)

  • Selected fixture: tests/fixtures/encoding/fingerprint-match.pdf
  • Size: 1,059 bytes (~1KB) - well under 50KB threshold
  • Expected content: Single word "Test" (from fingerprint-match.txt)

✅ PASS: Confirm the selected file exists and is readable

  • File exists: ✓
  • Readable permissions: ✓ (-rw-r--r--)
  • Valid PDF header: ✓ (starts with %PDF)
  • Exact size: 1,059 bytes

Documentation for Subsequent Beads

Chosen fixture path: tests/fixtures/encoding/fingerprint-match.pdf

This fixture will be used for all subsequent child beads requiring a small, fast encoding test fixture.

Rationale for Selection

  • Size: 1KB - minimal overhead for fast test execution
  • Simplicity: Extracts to single word "Test" - easy to verify correctness
  • Purpose: Designed for font fingerprint matching tests (Phase 2.2 Level 3)
  • Consistency: Recommended by task description

Test Environment

  • Working directory: /home/coding/pdftract
  • Fixture path: tests/fixtures/encoding/fingerprint-match.pdf
  • Fixture absolute path: /home/coding/pdftract/tests/fixtures/encoding/fingerprint-match.pdf

Verification Commands Executed

# List directory
ls -lh tests/fixtures/encoding/

# Verify file size and permissions
ls -lh tests/fixtures/encoding/fingerprint-match.pdf

# Verify PDF magic bytes
head -c 4 tests/fixtures/encoding/fingerprint-match.pdf

# Get exact size
stat -c %s tests/fixtures/encoding/fingerprint-match.pdf

# View expected content
cat tests/fixtures/encoding/fingerprint-match.txt

Conclusion

All acceptance criteria PASS. The fixture tests/fixtures/encoding/fingerprint-match.pdf is confirmed to exist, be readable, be a valid PDF, and meet the size requirements for fast execution.