[Python-Dev] Re: python/dist/src/Lib rfc822.py,1.78,1.79

Barry Warsaw barry at python.org
Tue Feb 8 17:59:23 CET 2005

On Tue, 2005-02-08 at 10:35, Guido van Rossum wrote:

> This would have been caught if there was a unit test validating what
> the documentation says. Why aren't there unit tests for this code? I
> think we need to raise the bar for "wholistic" improvements to a
> module: first write a unit test if there isn't already one (and if
> there is one, make sure that it tests all documented behavior), *then*
> refactor. Yes, this would be less fun. It's not supposed to be fun.
> It's supposed to avoid breaking code.

+1.  This module is used in so many place, you really have to take the
documented interface seriously (not that you shouldn't otherwise, of
course).  I suspect even the undocumented current semantics are relied
on in many place.


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