[Python-Dev] sprints and pushes

[Tres Seaver]

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On 03/23/2011 01:24 PM, Antoine Pitrou wrote:
> On Wed, 23 Mar 2011 10:25:01 -0700
> Ethan Furman <ethan at stoneleaf.us> wrote:
>>
>> I think the use-case has been lost.  Think sprints and multiple push 
>> races.  No one is arguing that the smoke-test should be the default, but 
>> seriously, are you willing to spend an hour or more re-running the 
>> complete suite of tests six, eight, or 12 times because of push races in 
>> a sprint?  I can see losing a good portion of your sprinting day.
> 
> Well, keep in ming hg is a *distributed* version control system. You
> don't have to push your changes right now. You can keep your changesets
> for yourself, make several of them (different bug fixes, for example),
> and push them (after a single merge) at the end of day.

That doesn't work so well at a sprint, where the point is to maximize
the value of precious face-time to get stuff done *now*.  Long test
latencies and nearly-real-time collaboration are not friendly, as the
agile folks document:

 http://c2.com/cgi/wiki?TestSpeed

Maybe we need to chop the problem up as:

- - Pure documentation changes never require running any test suite
  (this includes true comments in code, as well as docstrings which
  are not used to drive doctests or other tested output).

- - "core" language changes always require running the full test suite.

- - We compute an import-dependency map for the stdlib (maybe during
  build?), and add support for running tests of a named module and its
  dependents. Any non-documentation change to a stdlib module requires
  running this new kind of test against that module.


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