Re: Testing with concurrent sessions

Robert Haas wrote:
> On Wed, Jan 6, 2010 at 4:52 PM, Kevin Grittner
> <Kevin.Grittner@wicourts.gov> wrote:
>   
>> "David E. Wheeler" <david@kineticode.com> wrote:
>>
>>     
>>> Last I heard, Andrew was willing to require Test::More for
>>> testing, so that a Perl script could handle multiple psql
>>> connections (perhaps forked) and output test results based on
>>> them. But he wasn't as interested in requiring DBI and DBD::Pg,
>>> neither of which are in the Perl core and are more of a PITA to
>>> install (not huge, but the barrier might as well stay low).
>>>       
>> OK, I've gotten familiar with Perl as a programming language and
>> tinkered with Test::More.  What's not clear to me yet is what would
>> be considered good technique for launching several psql sessions
>> from that environment, interleaving commands to each of them, and
>> checking results from each of them as the test plan progresses.  Any
>> code snippets or URLs to help me understand that are welcome.  (It
>> seems clear enough with DBI, but I'm trying to avoid that per the
>> above.)
>>     
>
> Doing this without DBI is going to be ten times harder than doing it
> with DBI.  Are we really sure that's not a viable option?
>
>
>   

In the buildfarm? Yes, I think so. The philosophy of the buildfarm is 
that it should do what you would do yourself by hand.

And adding DBI as a requirement for running a buildfarm member would be 
a significant extra barrier to entry, ISTM. (I am very fond of DBI, and 
use it frequently, BTW)

I'm persuadable on most things, but this one would take a bit of doing.

A parallel psql seems to me a better way to go. We talked about that a 
while ago, but I don't recall what happened to it.

cheers

andrew