[Zope3-dev] layers can't be new style classes?

[Chris Withers]

Jim Fulton wrote:
> A layer is simply an object that has __module__, __name__, and __bases__
> attributes and that has setUp and tearDown methods.  That's it.  You
> can achieve that any way you want.  I regret the use of the __bases__
> attribute.  It would have been better if I had left it up to layer
> implementations to call base layers, rather than having the test runner 
> call
> them automatically.  It was a bad automation tradeoff.

Is it too late to add an explicit Layer class to zope.testing that deals 
with this properly rather than confusing n00bs like me?

(even if it does involve some BBB if/then/else'ing in testrunner.py...)

cheers,

Chris

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