Allow the user to filter slow tests above a threshold

[nickromano]

I have added an option to allow a user to specify a threshold so only tests slower than SLOW_TEST_THRESHOLD_MS will be shown.

Without specifying the setting the slowest tests will always show as expected.

$ python manage.py test
Creating test database for alias 'default'...
..........
----------------------------------------------------------------------
Ran 10 tests in 0.413s

OK
Destroying test database for alias 'default'...

10 slowest tests:
0.3597s test_detail_view_with_a_future_poll (polls.tests.PollIndexDetailTests)
0.2843s test_detail_view_with_a_past_poll (polls.tests.PollIndexDetailTests)
0.0068s test_index_view_with_a_future_poll (polls.tests.PollViewTests)
0.0047s test_index_view_with_a_past_poll (polls.tests.PollViewTests)
0.0045s test_index_view_with_two_past_polls (polls.tests.PollViewTests)
0.0041s test_index_view_with_future_poll_and_past_poll (polls.tests.PollViewTests)
0.0036s test_index_view_with_no_polls (polls.tests.PollViewTests)
0.0003s test_was_published_recently_with_future_poll (polls.tests.PollMethodTests)
0.0002s test_was_published_recently_with_recent_poll (polls.tests.PollMethodTests)
0.0002s test_was_published_recently_with_old_poll (polls.tests.PollMethodTests)

But if you have the option to specify for example SLOW_TEST_THRESHOLD_MS = 200 then only tests slower than this limit will show:

$ python manage.py test
Creating test database for alias 'default'...
..........
----------------------------------------------------------------------
Ran 10 tests in 0.413s

OK
Destroying test database for alias 'default'...

2 slowest tests over 200ms:
0.3597s test_detail_view_with_a_future_poll (polls.tests.PollIndexDetailTests)
0.2843s test_detail_view_with_a_past_poll (polls.tests.PollIndexDetailTests)

And if there are no tests above the threshold you will see the following message (for example if SLOW_TEST_THRESHOLD_MS is set to 400):

$ python manage.py test
Creating test database for alias 'default'...
..........
----------------------------------------------------------------------
Ran 10 tests in 0.413s

OK
Destroying test database for alias 'default'...

No tests slower than 400ms

Please let me know if you have any questions!

Thank you,
Nick

[coveralls]

Coverage decreased (-17.8%) to 66.154% when pulling d44c100 on nickromano:timing-threshold into 45a86b8 on realpython:master.

[coveralls]

Coverage decreased (-17.8%) to 66.154% when pulling d44c100 on nickromano:timing-threshold into 45a86b8 on realpython:master.

[coveralls]

Coverage decreased (-17.8%) to 66.154% when pulling d44c100 on nickromano:timing-threshold into 45a86b8 on realpython:master.

[nickromano]

If anyone has an idea of how to run and check the teardown_test_environment method in django_slowtests.tests.tests please let me know!

I'd be happy to write test cases for it.

[nickromano]

@mjhea0 Thanks again for the quick merge. Would it be possible to bump the package version number and upload to pypi?

[mjhea0]

@nickromano just updated it. https://pypi.python.org/pypi/django-slowtests/

[nickromano]

@mjhea0 Awesome thank you!