launchpad-dev team mailing list archive

[Stuart Bishop <stuart.bishop@xxxxxxxxxxxxx>]

On Tue, Aug 16, 2011 at 10:19 PM, Gary Poster <gary.poster@xxxxxxxxxxxxx> wrote:
>
> On Aug 16, 2011, at 11:13 AM, Jonathan Lange wrote:
>
>> On Tue, Aug 16, 2011 at 3:46 PM, Jeroen Vermeulen <jtv@xxxxxxxxxxxxx> wrote:
>>> Since my last thread of this kind led to such great news, I'm just going to
>>> keep doing it.
>>>
>>> Wouldn't it be great if our test suite automatically ran each of our utility
>>> interfaces through:
>>>
>>>    self.assertProvides(
>>>        getUtility(ISomethingSource), ISomethingSource)
>>>
>>> It's a pain to have to remember doing that for every utility, but doing it
>>> quickly checks for a wide range of possible mistakes.
>>>
>>
>> You don't have to remember if you are doing TDD and it's testing a
>> behaviour worth having.
>>
>> That said, ZCA probably ought to do a check like that on registration.
>
> And slow the startup further?  I'd vote no.  This is something that historically has belonged in tests, and I think it should stay there.

If you know the internals, it would probably a 5 line test to check
that every registered utility provides its interface. And a few extra
lines to fix the test fallout... :-)

-- 
Stuart Bishop <stuart@xxxxxxxxxxxxxxxx>
http://www.stuartbishop.net/