def test_search_rag_fusion_mode(client: R2RClient):
    """
    Integration test for RAG-Fusion search. For now, your code is a placeholder
    that calls _basic_search. But this ensures it doesn't error out and returns
    valid results.
    """
    suffix = str(uuid.uuid4())
    client.documents.create(
        raw_text=f"Plato was another Greek philosopher. RAGFusionTestDoc: {suffix}",
        metadata={"category": "test_rag_fusion"},
    )

    # 2) Perform a RAG-Fusion search
    resp = client.retrieval.search(
        query="Plato's contributions?",
        search_mode="custom",
        search_settings={
            "search_strategy": "rag_fusion",
            "use_semantic_search": True,
            "limit": 5,
            # "num_sub_queries": 3 if you actually implement it
        },
    )

    # 3) Validate the results
    results = resp.results
    assert results is not None, "No results returned by RAG-Fusion search"
    chunk_results = results.chunk_search_results
    assert chunk_results is not None, "No chunk_search_results for RAG-Fusion"
    # Possibly check if chunk_results is not empty if you have data
    assert (
        len(results.chunk_search_results) == 5
    ), "Expected 5 chunk search results"

    Integration test for RAG-Fusion search. For now, your code is a placeholder
    that calls _basic_search. But this ensures it doesn't error out and returns
    valid results.
    
py/tests/integration/test_retrieval.py