[tor-dev] Stem Testing Mocking Issue

[Damian Johnson]

> We also updated your adaptation to our patch so that no code is repeated.
> This should make the function cleaner and more readable.  This new code can
> be found at:
> https://github.com/jacthinman/Tor-Stem/blob/mocking/test/mocking.py

Ah ha, makes much more sense now - thanks. After some reflection I
realized that the mocking code was more convoluted that it needs to
be. What do you think of this change instead?

https://gitweb.torproject.org/user/atagar/stem.git/commitdiff/eb51eab0badf6b64d6119312478098686553f605

It seems to handle both of our use cases while also axing much of the
special handling for builtins...

>>> import test.mocking
>>> import time
>>> my_mock = lambda i: i
>>> test.mocking.mock(time.time, my_mock)
>>> time.time(5)
5
>>> test.mocking.revert_mocking()
>>> time.time()
1339689308.64306

>>> test.mocking.mock(open, my_mock)
>>> open(5)
5
>>> test.mocking.revert_mocking()
>>> open("/some_file", "r")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IOError: [Errno 2] No such file or directory: '/some_file'

If it looks good to you then I'll go ahead and merge this with master.
Cheers! -Damian

PS. Thanks for converting the mocking module to reStrcutredText.
Usually that would have been a welcome improvement, however in this
case I'd already converted it in the master branch so that actually
generated merge conflicts with your patch. It's helpful if there's
separate commits for separate changes (ie, a commit for the mocking
changes and another for the reStructuredText conversion). That said, I
don't always follow this rule either. ;)