Update tests to work with latest test dependencies (mock, vcrpy in particular)

[koobs]

Several tests fail when testing with the latest versions of test dependencies:

mock 3.x (3.0.4)
vcrpy 2.x (2.0.1)

These are the versions that exist (or are likely to exist) in downstream OS package sets, as they do for FreeBSD Ports in this case.

Most appear to fail with the same class of error, as follows:

TweepError: Failed to send request: No match for the request (<Request (GET) https://api.twitter.com/1.1/followers/ids.json?cursor=-1&id=tweepytest>) was found. Can't overwrite existing cassette ('cassettes/testcursorcu
rsoritems.json') in your current record mode ('none').

If you would like the full set, let me know and I'll include them in a followup.

It would be great if testing was against the latest versions of their test dependencies to pick up bugs/incompatibility issues as early as possible. This ensures downstream consumers (packagers in particular) are able to extensively and reliably QA upstream packages, and ensure a great experience for users.

To achieve this I'd suggest (in a branch):

• Removing test_requirements.txt in favour of setup.py:tests_require (similar to 778bd7a for requirements.txt/install_requires)
• Keep test dependencies unpinned (>=) so latest versions are used
• Note: Add tox dependency to extras_require { 'dev': ['tox'] } (not tests_require) as its not a compulsory requirement (unlike nose, mock vcrpy otoh, which are 'required'). coverage flake and other development only dependencies can go in here too.
• Use tweepy[dev] to install tox where upstream requires it (travis, wherever)
• Fix issues associated with mock 3.x, vcrpy 2.x, etc

[Harmon758]

Regarding test dependencies, I haven't had any issues using the latest versions for all of them, including the ones you specified.

That error you're encountering is due to c880c90, where the default test account was switched from @tweepytest to @TheTweepyTester and cassettes were updated accordingly. That commit missed updating the default testing configuration:

tweepy/tests/config.py

Line 14 in c880c90

username = os.environ.get('TWITTER_USERNAME', 'tweepytest')

Therefore, the default testing configuration was unable to find cassettes that used the username, tweepytest.

However, c573a28 has updated the default test account and corresponding cassettes again, along with the default testing configuration this time, so this shouldn't be an issue anymore. For more details, see #1242.

As for your additional points, I did and do plan on addressing them as follows:

• Unpin test requirements: 7f12532
  (in test_requirements.txt and tox.ini)
• Replace test_requirements.txt with tests_require in setup.py: 1b4d154
• Separate dev requirements from test requirements using extras_require in setup.py: 18c39a6
  (specifically, separate tox and add coveralls)

This will also likely result in the following changes:

• Specify nose.collector as the test suite in setup.py: 5413d21
• Use setup.cfg to specify nosetests verbosity and tests to run: 7d17d6c
  (merging and replacing travis-tests.cfg and explicit specification in tox.ini)
• Mirror test requirements using extras_require in setup.py: 1b4d154, 9cb5ae6
  (might be necessary to facilitate the ability to install test requirements without running tests
  and specifically, for Travis CI and tox)

And include additional changes I'm planning:

• Change default testing configuration to use existing cassettes: eada1ed
  (use_replay/USE_REPLAY = True)
• Document how to set up and run tests (More information needed on how to run tests #681): 0aa7310
• Drop nose or upgrade to nose2 (b4c06a4)

[Harmon758]

I've now completed almost all of the changes I had planned.

The only thing remaining to do is to drop usage of nose. Even the documentation for the library itself recommends against continuing to use it. Thus, I've already removed the only explicit usage of the library with 4312997. I don't see the point in migrating to nose2 and switching to another unnecessary library, so all that remains is to replace it with unittest. This should be relatively simple, only requiring setup.py to be updated to remove nose as a test requirement and suite and tox.ini and .travis.yml to be updated to run a unittest command with the specific test modules currently in setup.cfg.

However, I don't see any reason to drop it entirely right now, as it's still working and requires little to no overhead, while providing a nice interface for tox and Travis CI and clean visual output for tests and coverage. Hence, I'm going to leave it as is for now until such a point where it's necessary to make changes.

[Harmon758]

Following up, I've removed nose usage now, with b4c06a4, as it will stop working with Python 3.10 (nose-devs/nose#1099).

I anticipate using pytest in the future, to facilitate testing with asyncio / aiohttp, etc.

[koobs]

Thank you!