"""Phase 13 site 2: _chunk_code Result migration.

Site 2 (BC at L224): the AST-aware chunking has a fallback to text chunking
on any failure:
    try:
        parser = ASTParser('python')
        tree = parser.parse(content)
        ...
        return chunks
    except Exception:
        return self._chunk_text(content)

Body: broad catch + fallback to a different implementation. Per Phase 11
anti-sliming, this is an empty-default fallback. Migrate to Result.
"""
import sys
sys.path.insert(0, ".")


def test_phase13_site2_chunk_code_result_exists():
    import src.rag_engine
    assert hasattr(src.rag_engine.RAGEngine, "_chunk_code_result") or \
           hasattr(src.rag_engine, "_chunk_code_result"), \
        "_chunk_code_result helper missing"


def test_phase13_site2_chunk_code_legacy_no_broad_except():
    """Legacy _chunk_code must NOT have bare 'except Exception'."""
    import inspect
    import src.rag_engine
    src_text = inspect.getsource(src.rag_engine.RAGEngine._chunk_code)
    assert "except Exception:" not in src_text, \
        "_chunk_code legacy must not have bare 'except Exception'"