Overwrite debug function to do pre_setup and post_teardown

[tricosmo]

Hi

As the problem is discribed there. pytest-dev/pytest#1932 (comment). I think this is maybe a worthy fix.

Sorry this is the first time I create a pull request, if any unclear, please let me know
Thanks.
Niansheng Liu

[makmanalp]

Bump - this is causing headaches for me too, and it took me a long while to track down because it breaks even the debugging and manifests in very odd ways.

The reasoning of the py.test folks seems reasonable - if you're going to override __call__ it makes sense that you should have to override other stuff to make sure the behavior is consistent, including debug() (docs here), which is basically the same thing as __call__ but calling a different function and not collecting the result. FWIW, the change has my 👍 .