..
      Copyright 2012 New Dream Network, LLC (DreamHost)

      Licensed under the Apache License, Version 2.0 (the "License"); you may
      not use this file except in compliance with the License. You may obtain
      a copy of the License at

          http://www.apache.org/licenses/LICENSE-2.0

      Unless required by applicable law or agreed to in writing, software
      distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
      WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
      License for the specific language governing permissions and limitations
      under the License.

=================
Running the Tests
=================

Ceilometer includes an extensive set of automated unit tests which are
run through tox_.

1. Install ``tox``::

   $ sudo pip install tox

2. On Ubuntu install ``mongodb`` and ``libmysqlclient-dev`` packages::

   $ sudo apt-get install mongodb
   $ sudo apt-get install libmysqlclient-dev

   For Fedora20 there is no ``libmysqlclient-dev`` package, so you’ll need
   to install ``mariadb-devel.x86-64`` (or ``mariadb-devel.i386``) instead::

   $ sudo yum install mongodb
   $ sudo yum install mariadb-devel.x86_64

3. Install the test dependencies::

   $ sudo pip install -r /opt/stack/ceilometer/test-requirements.txt

4. Run the unit and code-style tests::

   $ cd /opt/stack/ceilometer
   $ tox -e py27,pep8

   As tox is a wrapper around testr, it also accepts the same flags as testr.
   See the `testr documentation`_ for details about these additional flags.

.. _testr documentation: https://testrepository.readthedocs.org/en/latest/MANUAL.html

   Use a double hyphen to pass options to testr. For example, to run only tests under tests/api/v2::

      $ tox -e py27 -- api.v2

   To debug tests (ie. break into pdb debugger), you can use ''debug'' tox
   environment. Here's an example, passing the name of a test since you'll
   normally only want to run the test that hits your breakpoint::

       $ tox -e debug ceilometer.tests.test_bin

   For reference, the ``debug`` tox environment implements the instructions
   here: https://wiki.openstack.org/wiki/Testr#Debugging_.28pdb.29_Tests

5. There is a growing suite of tests which use a tool called `gabbi`_ to
   test and validate the behavior of the Ceilometer API. These tests are run
   when using the usual ``py27`` tox target but if desired they can be run by
   themselves::

   $ tox -e gabbi

   The YAML files used to drive the gabbi tests can be found in
   ``ceilometer/tests/gabbi/gabbits``. If you are adding to or adjusting the
   API you should consider adding tests here.

.. _gabbi: https://gabbi.readthedocs.org/

.. seealso::

   * tox_

.. _tox: http://tox.testrun.org/latest/