pdftract/notes/bf-24gv1.md

BF-24GV1: Fixture Discovery Implementation

Overview

Implemented comprehensive test fixture discovery mechanism for PDF fixtures that need CLI processing. The system provides a testable, accessible API for enumerating all PDF fixtures across the entire test suite.

What Was Implemented

New File: crates/pdftract-cli/tests/fixture_discovery.rs

Created a new test module with the following capabilities:

Core Discovery Functions

1. discover_all_fixtures() - Discovers all 1,301 PDF fixtures recursively

   • Returns: Vec<PathBuf> (sorted, absolute paths)
   • Coverage: All fixtures in tests/fixtures/ tree

2. discover_fixtures_by_category(category) - Category-specific discovery

   • Categories: cjk, classifier, encoding, encrypted, grep-corpus, json_schema, malformed, ocr, page_class, perf, profiles, scanned, security, vector
   • Returns: Vec<PathBuf> for specified category

3. discover_fixtures_flat(dir_path) - Non-recursive discovery

   • Use for single-level directories
   • Returns: Vec<PathBuf> (sorted)

4. fixture_categories() - Lists all fixture categories

   • Returns: Vec<String> of category names
   • Only includes categories that actually contain PDFs

5. fixture_statistics() - Comprehensive statistics

   • Returns: FixtureStats struct with:
     • total_count: Total number of fixtures
     • category_count: Number of categories
     • category_counts: HashMap with per-category counts

Test Coverage

9 comprehensive tests covering:

• ✅ Fixtures root directory existence
• ✅ All fixture discovery (1,301 fixtures)
• ✅ Category-based discovery
• ✅ Fixture categories enumeration (14 categories)
• ✅ Fixture statistics generation
• ✅ Flat vs recursive discovery
• ✅ Nonexistent category handling
• ✅ Absolute path verification
• ✅ Sorting verification

Fixture Distribution

Total fixtures: 1,301
Categories: 14

Distribution by category:
- grep-corpus: 1,000 (largest)
- classifier: 200
- profiles: 20
- scanned: 16
- malformed: 15
- vector: 10
- json_schema: 6
- encoding: 6
- encrypted: 5
- security: 4
- page_class: 4
- cjk: 4
- ocr: 2
- perf: 2

Acceptance Criteria Status

Criterion	Status	Evidence
All fixture paths are discovered	✅ PASS	Discovers all 1,301 PDF fixtures across 14 categories
Fixtures are enumerated in test-accessible format	✅ PASS	Returns Vec<PathBuf> (sorted, absolute paths) ready for CLI invocation
Discovery mechanism is testable	✅ PASS	9 tests covering all functionality, all passing

Technical Details

Dependencies

• Uses walkdir crate for recursive filesystem traversal
• Follows existing pattern from forms_integration.rs
• Zero new dependencies (uses existing walkdir)

Design Decisions

1. Absolute paths only - Ensures reliable CLI invocation regardless of CWD
2. Sorted output - Provides deterministic ordering for tests
3. Graceful handling - Non-existent directories return empty Vec, no panics
4. Comprehensive stats - Provides visibility into fixture distribution

Integration Points

• Parent bead: bf-5qvoc (Add pdftract extract CLI invocation to integration tests)
• Uses pattern from: forms_integration.rs discover_pdf_fixtures() function
• Ready for: CLI invocation on each fixture via pdftract extract --json <path>

Verification

Manual Testing

# Run all fixture discovery tests
cargo test --test fixture_discovery

# Specific tests with output
cargo test --test fixture_discovery test_discover_all_fixtures -- --nocapture
cargo test --test fixture_discovery test_fixture_categories -- --nocapture
cargo test --test fixture_discovery test_fixture_statistics -- --nocapture

Output Verification

• All 9 tests pass
• Correctly discovers 1,301 fixtures
• Correctly identifies 14 categories
• Statistics match actual fixture distribution

Next Steps (Parent Bead: bf-5qvoc)

The fixture discovery system is now ready for use by the parent bead bf-5qvoc to:

1. Iterate through all discovered fixtures
2. Invoke pdftract extract --json on each fixture
3. Capture and validate CLI output
4. Ensure each fixture processes successfully

Files Modified

• Created: crates/pdftract-cli/tests/fixture_discovery.rs (548 lines)
• Test coverage: 9 comprehensive unit tests

Commit Information

• Commit: <commit-hash> (to be added)
• Files: crates/pdftract-cli/tests/fixture_discovery.rs
• Tests: All 9 tests passing (fixture_discovery)