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Re: avoid the redefinition of a function

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  Re: avoid the redefinition of a function Tim Chase <python.list@tim.thechases.com> - 2012-09-12 17:45 -0500

#29003 — Re: avoid the redefinition of a function

On 09/12/12 16:47, D'Arcy Cain wrote:
> On Wed, 12 Sep 2012 16:37:11 -0400
> Terry Reedy <tjreedy@udel.edu> wrote:
>> assures one that the test is being run. (I don't always test first, but 
>> I once discovered a test not being run when I modified it in a way that 
>> should have made it fail, but it didn't.)
> 
> 1. Write the test
> 2. Run the test - make sure it fails
> 3. write code until test passes
> 4. Stop writing code
> 
> People underestimate the importance of steps 2 and 4.  Number 2 is
> important because a test that can't fail is worse than useless.  Number
> 4 is important because it prevents code that doesn't have a
> corresponding test.  If you feel the need to write more code then go
> back to step 1.
> 
> And run all of your tests every day.  You will sleep better at night.

Though I usually try to do test-driven development, I confess a
fondness for Titus Brown's "Stupidity driven testing"[1] :-)

-tkc

[1]
http://ivory.idyll.org/blog/stupidity-driven-testing.html
(one of my most memorable pearls from PyCon'07)

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