bug#22534: File notify broken on Windows

[Eli Zaretskii]

> From: Fabrice Popineau <fabrice.popineau@gmail.com>
> Date: Mon, 8 Feb 2016 11:43:10 +0100
> Cc: Eli Zaretskii <eliz@gnu.org>, 22534@debbugs.gnu.org
> 
>  > events: ((created changed deleted)) ((17491048 created
>  > 
> c:/Users/Fabrice/AppData/Local/Temp/file-notify-test-parent20748Ali/file-notify-test20748Nvo)
>  > (17491048 changed
>  > 
> c:/Users/Fabrice/AppData/Local/Temp/file-notify-test-parent20748Ali/file-notify-test20748Nvo))
> 
>  Fails also for me in batch mode. Surprisingly, it doesn't fail always,
>  sometimes (about 1 in 10 runs) it succeeds here, and fails in the next
>  step. Strange.
> 
> I see the same. The deleted notifications number vary. When you expect 2, 
> sometimes I see 1.
> When you expect one, sometimes I see it. But not frequently.

Did you try adding calls to read-event after the functions that are
supposed to produce these events?

(I didn't yet have time to look into the traces.  Will do when I have
time.)

Btw, is there an easy way of running just one test out of
file-notify-test.el?  Running all of them takes a long time,
especially now that the 06 test is no longer considered "expensive".

Thanks.