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nova/doc/source/unit_tests.rst
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Joe Gordon a1e8fc6dd9 Update docs layout
* Explain these docs are for trunk (copied from ironic)
* All the docs in this repo are meant to be developer docs, so having a
  devref inside of the docs is redundant and just makes the docs more
  complicated to navigate. Move everything out of the devref folder and
  link to everything from main index.
* Move man pages into separate section. The man pages are pretty sparse
* right now, we should either make them useful or just delete them
* Remove dead docs from unused_docs list in doc/source/conf.py
* Shuffle docs landing page, move common referees to the top (API,
  hypervisor support matrix), Add a introduction section and more. The
  hope is the updated layout makes this document easier to navigate.
* Use maxdepth of 1
* Rename a few sections with what are hopefully better names

The next step is to prune out outdated documents and further cleanup
this page.

Change-Id: Iff453e47ccc902a0e72b1a5f6ce1ee939ff3a1a0
2015-05-15 10:47:18 -07:00

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Unit Tests
==========
Nova contains a suite of unit tests, in the nova/tests directory.
Any proposed code change will be automatically rejected by the OpenStack
Jenkins server [#f1]_ if the change causes unit test failures.
Preferred way to run the tests
------------------------------
The preferred way to run the unit tests is using ``tox``. See `the
unit testing section of the Testing wiki page`_ and `Nova's HACKING.rst`_
for more information. Following are some simple examples.
To run the style tests::
tox -e pep8
You can request multiple tests, separated by commas::
tox -e py27,pep8
.. _the unit testing section of the Testing wiki page: https://wiki.openstack.org/wiki/Testing#Unit_Tests
.. _Nova's HACKING.rst: http://git.openstack.org/cgit/openstack/nova/tree/HACKING.rst
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 ``nova/tests/unit/scheduler`` directory::
tox -e py27 nova.tests.unit.scheduler
To run the tests in the ``nova/tests/unit/virt/libvirt/test_driver.py`` file::
tox -e py27 test_driver
To run the tests in the ``CacheConcurrencyTestCase`` class in
``nova/tests/unit/virt/libvirt/test_driver.py``::
tox -e py27 test_driver.CacheConcurrencyTestCase
To run the `ValidateIntegerTestCase.test_invalid_inputs` test method in
``nova/tests/unit/test_utils.py``::
tox -epy27 test_utils.ValidateIntegerTestCase.test_invalid_inputs
Debugging strange test failures
-------------------------------
Things to try when there are odd test failures such as failure on
jenkins but not locally.
The venv can get stale. Force a refresh by adding the -r flag::
tox -r -e pep8
.. rubric:: Footnotes
.. [#f1] See :doc:`jenkins`.