def test_prepare_function_call_no_return_type():
    """Test function preparation without return type annotation"""
    def test_func(text: str):
        """Process this: {{ text }}"""
        pass

    docstring, kwargs, return_type = _prepare_function_call(
        test_func,
        args=("Hello",),
        kwargs={}
    )

    assert docstring == "Process this: Hello"
    assert kwargs == {"text": "Hello"}
    assert return_type is None
Test function preparation without return type annotation
tests/test_function_prep.py