How to use the uvicorn.lifespan.on.LifespanOn function in uvicorn

async def test():
        config = Config(app=app, lifespan="auto")
        lifespan = LifespanOn(config)

        await lifespan.startup()
        assert lifespan.error_occured
        assert not lifespan.should_exit
        await lifespan.shutdown()

async def test():
        config = Config(app=app, lifespan="on")
        lifespan = LifespanOn(config)

        assert not startup_complete
        assert not shutdown_complete
        await lifespan.startup()
        assert startup_complete
        assert not shutdown_complete
        await lifespan.shutdown()
        assert startup_complete
        assert shutdown_complete

async def test():
        config = Config(app=app, lifespan="on")
        lifespan = LifespanOn(config)

        await lifespan.startup()
        assert lifespan.error_occured
        assert lifespan.should_exit
        await lifespan.shutdown()

async def test():
        config = Config(app=app, lifespan="auto")
        lifespan = LifespanOn(config)

        assert not startup_complete
        assert not shutdown_complete
        await lifespan.startup()
        assert startup_complete
        assert not shutdown_complete
        await lifespan.shutdown()
        assert startup_complete
        assert shutdown_complete

)
        else:
            self.ssl = None

        encoded_headers = [
            (key.lower().encode("latin1"), value.encode("latin1"))
            for key, value in self.headers
        ]
        self.encoded_headers = (
            encoded_headers if b"server" in dict(encoded_headers) else
            [(b"server", b"Emmett")] + encoded_headers
        )

        self.http_protocol_class = self.http
        self.ws_protocol_class = self.ws
        self.lifespan_class = LifespanOn

        self.loaded_app = self.app
        self.interface = "asgi3"

        self.loaded = True