TST: add NaN tests for all data types (#12535)
- [x] closes #12535
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`

Any interest in converting this to a fixture(s)?  @WillAyd yes, I might try to do that, but not right now, though. OK thanks. This is in real need of it so any contribution there would be *greatly* appreciated.

I think this looks OK otherwise though @jreback  i’ll look soon  @tq0 can you use paramterize here instead; this is getting long and is non-idiomatic. I'd prefer parametreziation be done separately. The diff here is relatively
easy to understand.

On Mon, Jul 15, 2019 at 7:23 AM Jeff Reback <notifications@github.com>
wrote:

> *@jreback* requested changes on this pull request.
>
> comments
>
> —
> You are receiving this because you are subscribed to this thread.
> Reply to this email directly, view it on GitHub
> <https://github.com/pandas-dev/pandas/pull/27378?email_source=notifications&email_token=AAKAOISL4JI7QXKOKLKNDWDP7RT55A5CNFSM4IC4DRBKYY3PNVWWK3TUL52HS4DFWFIHK3DMKJSXC5LFON2FEZLWNFSXPKTDN5WW2ZLOORPWSZGOB6NID5Y#pullrequestreview-261784055>,
> or mute the thread
> <https://github.com/notifications/unsubscribe-auth/AAKAOIQ5EH2Y6VGFQ2AXQ7LP7RT55ANCNFSM4IC4DRBA>
> .
>
 thanks @tq0 if you can follow up with a PR to parameterize would be great.