# bf-2nl4x: Encryption Test Infrastructure - Verification Note

## Summary

The encryption test file `/home/coding/pdftract/tests/encryption_errors.rs` already contains all necessary imports and test infrastructure. The file compiles successfully and has comprehensive test infrastructure in place.

## Current State

### Imports Present (Lines 16-27)

All required imports are already in place:

1. **Standard library imports:**
   - `std::fs` - filesystem operations
   - `std::path::{Path, PathBuf}` - path handling
   - `std::process::Command` - process spawning for CLI testing

2. **pdftract CLI imports:**
   - `pdftract_cli::hash::{EXIT_ENCRYPTED, EXIT_SUCCESS}` - exit code constants

3. **pdftract Core imports:**
   - `pdftract_core::diagnostics::{DiagCode, Diagnostic}` - error diagnostics
   - `pdftract_core::encryption::decryptor::DecryptionError` - encryption error types

### Test Infrastructure in Place (Lines 30-99)

1. **Constants:**
   - `EXPECTED_ENCRYPTION_EXIT_CODE` (line 34) - exit code 3 for encryption errors
   - `ENCRYPTED_FIXTURES` (lines 37-44) - list of encrypted test fixtures

2. **Helper Functions:**
   - `pdftract_bin()` (lines 51-64) - locates the pdftract binary
   - `encrypted_fixtures_dir()` (lines 67-70) - path to encrypted fixtures
   - `encrypted_fixture()` (lines 73-75) - path to specific fixture
   - `assert_encryption_diagnostic()` (lines 78-89) - validates diagnostic output
   - `assert_encryption_exit_code()` (lines 92-99) - validates exit code behavior

3. **Test Modules (Lines 106-236):**
   - `unsupported_handlers` - tests for unknown encryption handlers
   - `exit_codes` - tests for encryption exit code behavior
   - `password_handling` - tests for password scenarios
   - `consistency` - tests for consistent error handling

### Feature Gate

The file is properly feature-gated with `#![cfg(feature = "decrypt")]` (line 14) to only compile when decryption support is enabled.

## Compilation Status

✅ **File compiles successfully**

```bash
cargo check --tests
# No compilation errors
```

All imports match the actual crate structure:
- `pdftract_cli::hash::{EXIT_ENCRYPTED, EXIT_SUCCESS}` ✅ Verified exists in `crates/pdftract-cli/src/hash.rs`
- `pdftract_core::diagnostics::{DiagCode, Diagnostic}` ✅ Verified exists in `crates/pdftract-core/src/diagnostics.rs`
- `pdftract_core::encryption::decryptor::DecryptionError` ✅ Verified exists in `crates/pdftract-core/src/encryption/decryptor.rs`

## Acceptance Criteria Status

- ✅ **All necessary imports added (use statements):** All 6 import statements present and correct
- ✅ **Test infrastructure in place (helpers, fixtures if needed):** 2 constants + 5 helper functions + 4 test modules
- ✅ **File still compiles successfully:** No compilation errors
- ✅ **Imports match actual crate structure:** All imports verified against source code

## Notes

The encryption test infrastructure was already implemented in a previous commit as part of bead bf-5for4. The comprehensive test structure includes:
- Modular test organization by encryption scenario
- Fixture validation infrastructure
- Exit code verification patterns
- Password handling tests
- Proper feature gating for decryption support

No additional imports or infrastructure were needed - all requirements are met.

## References

- Parent bead: bf-56jda
- Previous bead: bf-11mft (verified test file location)
- Plan line 258, Failure Mode Taxonomy: ENCRYPTION_UNSUPPORTED
- Plan line 732: Input | Encryption-unsupported | /Encrypt dict with unknown handler
- Plan line 765: ENCRYPTION_UNSUPPORTED diagnostic code