"""Phase 10 site 4: _should_cache_gemini_result helper."""
import sys
sys.path.insert(0, ".")


def test_phase10_site4_should_cache_gemini_result_exists():
    import src.ai_client
    assert hasattr(src.ai_client, "_should_cache_gemini_result"), \
        "_should_cache_gemini_result helper missing"


def test_phase10_site4_should_cache_gemini_result_returns_result():
    import src.ai_client
    import inspect
    fn = src.ai_client._should_cache_gemini_result
    sig = inspect.signature(fn)
    assert "Result" in str(sig.return_annotation), \
        f"_should_cache_gemini_result return must be Result, got {sig.return_annotation}"