How to use the ptr._generate_pyre_cmd function in ptr

def test_generate_pyre_cmd(self) -> None:
        with TemporaryDirectory() as td:
            td_path = Path(td)
            pyre_exe = Path("pyre")

            conf = {"run_pyre": True}
            expected = (str(pyre_exe), "--source-directory", str(td_path), "check")
            if ptr.WINDOWS:
                expected = ()
            self.assertEqual(ptr._generate_pyre_cmd(td_path, pyre_exe, conf), expected)