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Date: Fri, 11 Oct 2013 10:51:01 -0700
From: Ethan Furman <ethan@stoneleaf.us>
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To: python-list@python.org
Subject: Re: Skipping decorators in unit tests
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Xref: csiph.com comp.lang.python:56701

On 10/10/2013 08:13 PM, Cameron Simpson wrote:
> On 11Oct2013 02:55, Steven D'Aprano <steve+comp.lang.python@pearwood.info> wrote:
>> On Fri, 11 Oct 2013 09:12:38 +1100, Cameron Simpson wrote:
>>> Speaking for myself, I would be include to recast this code:
>>>
>>>    @absolutize
>>>    def addition(a, b):
>>>        return a + b
>>>
>>> into:
>>>
>>>    def _addition(a, b):
>>>        return a + b
>>>    addition = absolutize(_addition)
>>>
>>> Then you can unit test both _addition() and addition().
>>
>> *shudders*
>> Ew ew ew ew.
>
> Care to provide some technical discourse here? Aside from losing the neat
> and evocative @decorator syntax, the above is simple and overt.

And completely dismisses the whole point of adding @decorator to the 
language:  easy to use, easy to see == folks will actually use it.

>> I would much rather do something like this:
>>
>> def undecorate(f):
>>      """Return the undecorated inner function from function f."""
>>      return f.func_closure[0].cell_contents
>
> Whereas this feels like black magic. Is this portable to any decorated
> function? If so, I'd have hoped it was in the stdlib. If not: black magic.

Probably black magic.  But you can go with the decorator.wrapped route; 
after all, you're testing your own stuff so you should have control of 
your own decorators (okay, you may have to adapt a few others ;) .

--
~Ethan~