Re: [PATCH 1/2] test: wait until expected value appear in log

[Alexander Turenko <alexander.turenko@tarantool.org>]

>  fio.basename(snaps[1], '.snap') >= fio.basename(xlogs[1], '.xlog')
>  
>  -- gh-2780 check that scheduled snapshots are performed
> -fiber.sleep(3 * PERIOD)
> --- check that it's not first snapshot
> -test_run:grep_log("default", "saving snapshot", 400) == nil
> -test_run:grep_log("default", "making snapshot", 400) ~= nil
> +test_run:wait_log("default", "making snapshot", 400, 1.0 + PERIOD)
>  
>  -- restore default options
>  box.cfg{checkpoint_interval = 3600 * 4, checkpoint_count = 4 }

Cite from the previous review:

> >  -- gh-2780 check that scheduled snapshots are performed
> > -fiber.sleep(3 * PERIOD)
> >  -- check that it's not first snapshot
> > -test_run:grep_log("default", "saving snapshot", 400) == nil
> > -test_run:grep_log("default", "making snapshot", 400) ~= nil
> > +wait_cond(function() return test_run:grep_log("default", "saving snapshot", 400) == nil end)
> > +wait_cond(function() return test_run:grep_log("default", "making snapshot", 400) ~= nil end)

> Now we don't check that 'saving snapshot' does not appear during some
> time period. Maybe we should check it after 'making snapshot'.

It seems you decided to remove the check for some reason you don't mention in
the commit message. Am I missed something obvious?

In the previous message I just stated that **your** (previous) version of the
patch does not check for 'saving snapshot' while the original case does.

WBR, Alexander Turenko.