Setup/teardown exception capturing as early/late as possible to catch all exceptions

[nicoddemus]

Now exception capturing is setup as early as possible, and disabled as late as possible. Also, this new approach allows us to distinguish exceptions captured during setup/call/teardown, which provides a more friendly message when the exception occurred inside the test call (as opposed during qtbot's teardown).

Fixes #105
Fixes #106

[The-Compiler]

Why not simply:

exceptions = self.exceptions
self.exceptions = []

here?

[nicoddemus]

Of course! 😅

Done

[The-Compiler]

Looks great apart from the things I commented on! It doesn't fix #106 though - I added a comment there to clear things up hopefully.

With this, I can finally develop complex fixtures without getting an abort() thrown at me 😉

[nicoddemus]

Implemented the changes we talked about. Could you please test the new commits again? Thanks!

[The-Compiler]

Yay, thanks again! I'll test and merge this either later today or tomorrow.

[nicoddemus]

Nice, thanks!

[The-Compiler]

This is also 2.8 specific 😉

[nicoddemus]

Ooops. 😅

[The-Compiler]

Looks good now, and fixes the issues I've had 👍

I think I'll give #107 a quick try on my way home (unless you want to), and after that, what do you think about a release?

[nicoddemus]

I think I'll give #107 a quick try on my way home (unless you want to), and after that, what do you think about a release?

Please go ahead with #107, thanks! 😄

I would like to address pytest-dev/pytest-mock#22 as well into 1.9.0, if possible.