Unit Tests

Unit Tests

Manila contains a suite of unit tests, in the manila/tests directory.

Any proposed code change will be automatically rejected by the OpenStack Jenkins server if the change causes unit test failures.

Running the tests

To run all unit tests simply run:

tox

This will create a virtual environment, load all the packages from test-requirements.txt and run all unit tests as well as run flake8 and hacking checks against the code.

You may run individual test targets, for example only py27 tests, by running:

tox -e py27

Note that you can inspect the tox.ini file to get more details on the available options and what the test run does by default.

Running a subset of tests

Instead of running all tests, you can specify an individual directory, file, class, or method that contains test code.

To run the tests in the manila/tests/scheduler directory:

tox -epy27 -- manila.tests.scheduler

To run the tests in the ShareManagerTestCase class in manila/tests/share/test_manager.py:

tox -epy27 -- manila.tests.share.test_manager.ShareManagerTestCase

To run the ShareManagerTestCase::test_share_manager_instance test method in manila/tests/share/test_manager.py:

tox -epy27 -- manila.tests.share.test_manager.ShareManagerTestCase.test_share_manager_instance

For more information on these options and details about stestr, please see the stestr documentation.

Database Setup

Some unit tests will use a local database. You can use tools/test-setup.sh to set up your local system the same way as it’s setup in the CI environment.

Gotchas

Running Tests from Shared Folders

If you are running the unit tests from a shared folder, you may see tests start to fail or stop completely as a result of Python lockfile issues [3]. You can get around this by manually setting or updating the following line in manila/tests/conf_fixture.py:

FLAGS['lock_path'].SetDefault('/tmp')

Note that you may use any location (not just /tmp!) as long as it is not a shared folder.

Footnotes

[1]See Setting Up a Development Environment for more details about the use of virtualenv.
[2]There is an effort underway to use a fake DB implementation for the unit tests. See https://lists.launchpad.net/openstack/msg05604.html
[3]See Vish’s comment in this bug report: https://bugs.launchpad.net/manila/+bug/882933
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