[Zope-dev] SVN: zope.dublincore/trunk/ Move test-dependencies to 'extras'.

[Tres Seaver]

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Fred Drake wrote:
> On Fri, Aug 29, 2008 at 5:26 PM, Malthe Borch <mborch at gmail.com> wrote:
>> I didn't know there was a controversy, but I do remember that there was
>> consensus that ``extras_require`` is not the most elegant solution.
> 
> Oh, there is!
> 
>> If you can advise a different way to avoid pulling in
>> ``zope.app.testing`` I'm happy to revert the change; otherwise I think
>> we should live and let live with it since it at the very least does the job.
> 
> There's no good way to avoid dependencies like zope.app.testing;
> because that's part of the test environment, the tests won't show
> whether there are problems when it's removed.  If you want to fly what
> you test, test dependencies can't be eliminated.

BTW, that phrase is disingeuous:  as one who worked on testing one of
the earliest fly-by-wire fighter jets[1] (long ago in a galaxy far far
away), I can assure you that the plane did *not* have all its various
test jigs attatched to it as it rolled down the runway.

 - Before assembly, components get tested in isolation using whatever
   jigs were appropriate, with testing done at each "rollup" of a
   new assembly.

 - After integration into the airframe, the set of tests possible
   were vastly reduced:  a minimal set of tests could be done
   in a preflight check without external equipment, but any failure
   in such a test resulted in pulling the indicated part for
   diagnosis using dedicated equipment.


[1] http://en.wikipedia.org/wiki/F-16_Falcon#Fly-by-wire


Tres.
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Tres Seaver          +1 540-429-0999          tseaver at palladion.com
Palladion Software   "Excellence by Design"    http://palladion.com
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