pdftract/notes/bf-14tjh.md

Verification Note for bf-14tjh: PDF Fixture Discovery Logic

Task Summary

Add PDF fixture discovery logic for forms integration tests.

Implementation Status

The PDF fixture discovery logic was already fully implemented in the test file: crates/pdftract-cli/tests/forms_integration.rs

Discovery Functions

1. discover_pdf_fixtures() (lines 63-83)

   • Uses walkdir crate for recursive directory traversal
   • Filters for .pdf files only
   • Returns sorted Vec<PathBuf> of discovered PDFs
   • Accepts generic P: AsRef<Path> for flexibility

2. find_pdf_fixtures() (lines 39-54)

   • Uses std::fs::read_dir for non-recursive discovery
   • Filters for .pdf files using std::path::Path API
   • Returns sorted Vec<PathBuf> of discovered PDFs

3. fixtures_dir() (lines 34-36)

   • Helper function returning path to tests/fixtures/forms

Test Coverage

The test file includes 6 tests that validate the discovery logic:

1. test_discover_pdf_fixtures() (lines 90-108)

   • Tests the discover_pdf_fixtures() function
   • Prints all discovered PDF fixtures to stdout
   • Reports count and handles empty directory gracefully

2. test_forms_fixtures_discovery() (lines 115-160)

   • Uses find_pdf_fixtures() for non-recursive discovery
   • Invokes pdftract extract --json on each fixture
   • Verifies binary existence and processing

3. test_extract_all_discovered_pdfs() (lines 168-253)

   • Tests recursive discovery with discover_pdf_fixtures()
   • Runs extraction on all discovered PDFs
   • Prints detailed success/failure summary

4. test_form_field_structure() (lines 264-278) - Skeleton for future validation

5. test_acroform_features() (lines 287-303) - Skeleton for AcroForm testing

6. test_xfa_detection() (lines 311-321) - Skeleton for XFA testing

Acceptance Criteria Verification

✅ Test discovers all PDF files in tests/fixtures/forms/

• Both discover_pdf_fixtures() and find_pdf_fixtures() correctly filter for .pdf extension
• Functions handle non-existent directories gracefully (return empty Vec)

✅ Discovered fixtures are printed/logged for verification

• test_discover_pdf_fixtures() prints discovered fixtures with this format:

  === Discovered PDF Fixtures ===
    - /path/to/fixture.pdf
  Total: N PDF file(s)
  ==============================
  

• test_extract_all_discovered_pdfs() prints processing results for each PDF

✅ cargo test forms_integration passes

running 6 tests
test test_acroform_features ... ok
test test_discover_pdf_fixtures ... ok
test test_form_field_structure ... ok
test test_extract_all_discovered_pdfs ... ok
test test_forms_fixtures_discovery ... ok
test test_xfa_detection ... ok

test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out

✅ Test is idempotent

• Tests only read files, no side effects
• Multiple runs produce identical results
• No state mutations between runs

Dependencies

The test uses these dependencies (already in Cargo.toml):

• walkdir crate (version 2.x) for recursive directory traversal
• std::path::{Path, PathBuf} for path manipulation
• std::fs::read_dir for non-recursive iteration

Current State

• Discovery logic: ✅ Fully implemented
• Tests: ✅ All passing
• Fixtures: ⚠️ Not yet generated (generator has lopdf API compatibility issues)

Notes

The fixture generator at xtask/src/bin/gen_form_fixtures.rs exists but has compilation errors due to lopdf API version mismatches (StringFormat parameter). This is a separate issue from the discovery logic itself, which is fully functional.

When fixtures are generated (either by fixing the generator or manually), the discovery tests will automatically process them.