pdftract/notes/bf-34v5a.md

bf-34v5a: Extract fixture discovery into standalone module

Summary

Verified that fixture discovery code is already implemented as a standalone, reusable module at crates/pdftract-cli/tests/fixture_discovery.rs.

Implementation Status

Module Structure

• File: crates/pdftract-cli/tests/fixture_discovery.rs (516 lines)
• Module type: Standalone Rust module with comprehensive documentation
• Test coverage: 13 unit tests, all passing

Public API Functions

The module provides the following public functions:

1. fixtures_root() - Returns the root fixtures directory path
2. discover_all_fixtures() - Recursively discovers all PDF files
3. discover_fixtures_by_category(category) - Discovers PDFs in a specific category
4. discover_fixtures_flat(dir) - Non-recursive discovery in a single directory
5. discover_fixtures_in_dir(dir) - Recursive discovery in a specific directory (internal)
6. fixture_categories() - Lists all fixture categories present
7. fixture_statistics() - Returns summary statistics about fixtures

Usage in Test Code

The module is successfully imported and used by:

• cli_invocation_fixtures.rs - Uses fixtures_root, discover_all_fixtures, discover_fixtures_by_category, discover_fixtures_in_dir, fixture_categories
• forms_integration.rs - Uses fixtures_root, discover_fixtures_by_category, discover_fixtures_flat

Key Features

• Path normalization (handles symlinks, relative paths, absolute paths)
• Recursive and non-recursive discovery modes
• Category-based filtering
• Sorted results for deterministic testing
• Comprehensive test coverage (13 tests)

Test Results

All 50 tests passed across the fixture discovery ecosystem:

• fixture_discovery.rs: 13 tests passed
• cli_invocation_fixtures.rs: 18 tests passed
• forms_integration.rs: 19 tests passed

Acceptance Criteria Verification

✅ Discovery code is in its own module/file

Status: COMPLETE

• File exists at crates/pdftract-cli/tests/fixture_discovery.rs
• Well-documented with module-level and function-level docs
• Clean, modular code structure

✅ Provides a clear public function for getting PDF fixtures

Status: COMPLETE

• Multiple public functions for different discovery needs
• Clear function names: discover_all_fixtures(), discover_fixtures_by_category(), etc.
• Comprehensive documentation with examples
• Return types are clearly documented (Vec<PathBuf>, FixtureStats, etc.)

✅ Is importable and usable from test code

Status: COMPLETE

• Successfully imported via mod fixture_discovery; in test files
• Functions imported via use fixture_discovery::{...} statements
• No compilation errors or import issues
• Used across multiple test files

Verification Steps Performed

1. Reviewed fixture_discovery.rs implementation
2. Verified public API functions
3. Checked imports in cli_invocation_fixtures.rs and forms_integration.rs
4. Ran full test suite: 50/50 tests passed
5. Verified module documentation and examples

Conclusion

The fixture discovery code is already fully extracted into a standalone, reusable module that meets all acceptance criteria. The module provides:

• Clean separation of concerns
• Comprehensive public API
• Full test coverage
• Clear documentation
• Reusable patterns for test code

No code changes were required - the implementation was already complete.

Files Verified

• crates/pdftract-cli/tests/fixture_discovery.rs
• crates/pdftract-cli/tests/cli_invocation_fixtures.rs
• crates/pdftract-cli/tests/forms_integration.rs

Test Commands Run

cargo test --test fixture_discovery --test cli_invocation_fixtures --test forms_integration

Result: 50/50 tests passed in 0.29s