Running the Tests for pbr
=========================

The testing system is based on a combination of `tox`_ and `testr`_. The canonical
approach to running tests is to simply run the command ``tox``. This will
create virtual environments, populate them with dependencies and run all of
the tests that OpenStack CI systems run. Behind the scenes, tox is running
``testr run --parallel``, but is set up such that you can supply any additional
testr arguments that are needed to tox. For example, you can run:
``tox -- --analyze-isolation`` to cause tox to tell testr to add
``--analyze-isolation`` to its argument list.

It is also possible to run the tests inside of a virtual environment
you have created, or it is possible that you have all of the dependencies
installed locally already. If you'd like to go this route, the requirements
are listed in ``requirements.txt`` and the requirements for testing are in
``test-requirements.txt``. Installing them via pip, for instance, is simply::

  pip install -r requirements.txt -r test-requirements.txt

In you go this route, you can interact with the testr command directly.
Running ``testr run`` will run the entire test suite. ``testr run --parallel``
will run it in parallel (this is the default incantation tox uses). More
information about testr can be found at: http://wiki.openstack.org/testr

.. _tox: http://tox.testrun.org/
.. _testr: https://wiki.openstack.org/wiki/Testr