Added mock, coverage and pep8 dep. Added pep8 options

[montefra]

I've added mock as mandatory dependency for python < 3.3 and coverage and pep8 as optional one. I've also added the pep8 options that I've found this morning in the tests.py script.

[montefra]

why does the second call of tests.py is

python ../matplotlib/tests.py -sv --processes=5 --process-timeout=300

and not

python tests.py -sv --processes=5 --process-timeout=300

like the first one?

[pelson]

Thanks @montefra. Why are mock and pep8 considered mandatory dependencies? Both are 100% (optional?) test dependencies, but neither should be used in the non-test codebase.

[montefra]

@pelson: mock is mandatory for testing if one uses python < 3.3, so I have added it after the nose entry. coverage and pep8 are optional and I've added them after:

Optionally you can install:

Why are mock and pep8 considered mandatory dependencies? Both are 100% (optional?) test dependencies, but neither should be used in the non-test codebase.

What do you mean? I've edited only testing.rst, I haven't added mock, coverage or pep8 anywhere else.

[jenshnielsen]

@pelson Mock is actually used to build the docs at this stage to avoid pulling in additional dependencies when running autodoc. I should probably improve the documentation to reflect that.

[montefra]

If the commit is accepted, would it make sense to also have a message in setupext:Tests if coverage and/or pep8 are not installed?

[pelson]

What do you mean? I've edited only testing.rst, I haven't added mock, coverage or pep8 anywhere else.

My apologies, the PR title does not reflect what you have done. I'm 👍 with this change as it is.