def METHOD_NAME(self) -> None:
    simple_field = RequestField("somename", "data")
    assert simple_field.render_headers() == "\r\n"
    filename_field = RequestField("somename", "data", filename="somefile.txt")
    assert filename_field.render_headers() == "\r\n"
    headers_field = RequestField(
        "somename", "data", headers={"Content-Length": "4"}
    )
    assert headers_field.render_headers() == "Content-Length: 4\r\n\r\n"