8.4.1. Python FFI Tests🔗

Two Python test suites validate the ctypes-based bindings:

• FFI Integration Tests (Tests/test_python_ffi.py) — tests the C shared library directly from Python

• Package Tests (python/tests/) — tests the l4yaml Python package API

Results are captured as both text logs and JUnit XML, with an HTML report generated from the JUnit data.

8.4.2. Cross-Language Comparison🔗

The cross-language comparison runs the full yaml-test-suite through all four backends (Lean, C, Python, Rust) across five limit presets (unlimited, default, strict, permissive, safe_tags).

This verifies that the FFI layer preserves identical parsing behavior — every backend must produce the same pass/fail/skip results for every test case under every preset configuration.

Results are available at Cross-Language Comparison Report.