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Re: thought on testing function in select.c

From: Amr Shahin <>
Date: Wed, 13 Jul 2011 01:28:00 +0300

On Tue, Jul 12, 2011 at 7:42 AM, Julien Chaffraix <> wrote:

> >> have a the test to pass file descriptors to Curl_poll. run a separate
> >> thread/process that will write to specified files. make sure Curl_poll
> >> returned and has the correct info set.
> >>
> >> I do feel though that this test is a bit complex, if there are better
> >> ideas please share them.
> >
> > They're really hard to unit test sensibly, yes. The hard part about using
> > threads is that we need to detect and use a threading lib that libcurl
> may
> > not use by itself.
> Also it opens a can of worms as now your tests can easily be flakey
> and / or timing depend.
> > I guess an alternative approach is to simply use the functions when
> > connecting to a test server using sockets, as we already have such test
> > servers but that's still a pretty complicated setup for a unit test.
> Usually the solution to that is to mock your objects. As we are not
> using an object-oriented language, we may want to put replacement for
> the standard library functions and use them instead for the unit
> tests. That should enable us to get good coverage of those.
> Julien
> -------------------------------------------------------------------
> List admin:
> Etiquette:

Ok, i would like to first start by breaking those function into a bit of
smaller pieces, i can see that they handle two cases where there is a "fine
poll" and there isn't, after that i could do the trivial testing. Then at a
later stage we can think of some way to fool/mock file handler status.

List admin:
Received on 2011-07-13