def test_rag_fusion_mode_with_subqueries(client: R2RClient):
    """
    If/when you actually implement multi-subquery logic for rag_fusion,
    you'd pass 'num_sub_queries': 3, etc.
    Currently it's a placeholder, but let's just confirm the service doesn't error out.
    """
    resp = client.retrieval.search(
        query="What are Plato's main dialogues?",
        search_mode="custom",
        search_settings={
            "search_strategy": "rag_fusion",
            "use_semantic_search": True,
            "limit": 5,
            "num_sub_queries": 3,
        },
    )
    results = resp.results
    assert (
        results is not None
    ), "No results returned by RAG-Fusion with subqueries"
    # When fully implemented, you can check if the chunk results are non-empty, etc.

    If/when you actually implement multi-subquery logic for rag_fusion,
    you'd pass 'num_sub_queries': 3, etc.
    Currently it's a placeholder, but let's just confirm the service doesn't error out.
    
py/tests/integration/test_retrieval.py