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Date: Sat, 26 Sep 2009 11:28:59 -0700
From: Dan Colish <dan@unencrypted.org>
To: Mark Mielke <mark@mark.mielke.cc>
Cc: Simon Riggs <simon@2ndQuadrant.com>, Robert Haas <robertmhaas@gmail.com>,
	pgsql-hackers <pgsql-hackers@postgresql.org>
Subject: Re: Hot Standby on git
Message-ID: <20090926182859.GA9544@funkstrom.spiretech.com>
Mail-Followup-To: Mark Mielke <mark@mark.mielke.cc>,
	Simon Riggs <simon@2ndQuadrant.com>,
	Robert Haas <robertmhaas@gmail.com>,
	pgsql-hackers <pgsql-hackers@postgresql.org>
References: <1253958559.4449.833.camel@ebony.2ndQuadrant>
	<603c8f070909260629s1f070a8bl8aa6dc97fa87ce43@mail.gmail.com>
	<1253973877.4449.899.camel@ebony.2ndQuadrant>
	<4ABE28FD.7060404@mark.mielke.cc>
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On Sat, Sep 26, 2009 at 10:45:17AM -0400, Mark Mielke wrote:
> On 09/26/2009 10:04 AM, Simon Riggs wrote:
> >>If you think there's
> >>something useful I could do, let me know and I'll take a look.
> >I feel like I need a better way of unit testing new code. Some of the
> >code in the patch is to handle corner cases, so recreating them is
> >fairly hard. It is a nagging feeling that I am missing some knowledge
> >here and would welcome some insight, or research, into better ways of
> >doing general case unit testing.
> 
> You might try and steal ideas from EasyMock / PowerMock - but not
> sure how well the ideas map to C.
> 
> Generally it means allowing the functions to be called from a "mock"
> environment, where subroutine calls that might be called are stubbed
> out to return sample data that would simulate your scenario. Object
> oriented languages that require every object to provide an interface
> where most object methods can be overridden are more ideal for
> performing this sort of test.
> 
> I rarely ever see this sort of stuff in FOSS projects, and never
> that I can remember in FOSS C projects. It's not easy, though.
> 
> I assume you are doing it through code changing right now.
> Commenting out lines, replacing them with others, etc?
> 
> Cheers,
> mark
> 
> -- 
> Mark Mielke<mark@mielke.cc>
> 
> 

There are a variety of projects dedicated to creating C unit test
frameworks. I don't have a lot of experience with them, but I have heard
good things about check and cunit. Here's a link I found with a longer
list of frameworks. http://www.opensourcetesting.org/unit_c.php

--
--Dan