Please consider making lsst.ts.common.BaseDataClient into an async context manager by adding __aenter__ and ___aexit__ methods. This would only be used by unit tests and I'm not completely sure how much it will help. But at least have a look.

It will look like this:

    async def __aenter__(self) -> BaseDataClient:

        await self.start()

        return self

    async def __aexit__(

        self,

        type: typing.Type[BaseException] | None,

        value: BaseException | None,

        traceback: types.TracebackType | None,

    ) -> None:

        await self.stop()

I suggest trying to use it in some unit tests to sanity-check whether it is a good idea.