Add TESTING file

Change-Id: Ifa3ff45189b794dfb2c29e127599dbe547b57f71
Reviewed-on: https://review.openstack.org/35354
Reviewed-by: Anita Kuno <anteaya@anteaya.info>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Approved: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins
diff --git a/TESTING.rst b/TESTING.rst
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+===========================
+Testing Your OpenStack Code
+===========================
+------------
+A Quickstart
+------------
+
+This is designed to be enough information for you to run your first tests.
+Detailed information on testing can be found here: https://wiki.openstack.org/wiki/Testing
+
+*Install pip*::
+
+  [apt-get | yum] install python-pip
+More information on pip here: http://www.pip-installer.org/en/latest/
+
+*Use pip to install tox*::
+
+  pip install tox
+
+Run The Tests
+-------------
+
+*Navigate to the project's root directory and execute*::
+
+  tox
+Note: completing this command may take a long time (depends on system resources)
+also, you might not see any output until tox is complete.
+
+Information about tox can be found here: http://testrun.org/tox/latest/
+
+
+Run The Tests in One Environment
+--------------------------------
+
+Tox will run your entire test suite in the environments specified in the project tox.ini::
+
+  [tox]
+
+  envlist = <list of available environments>
+
+To run the test suite in just one of the environments in envlist execute::
+
+  tox -e <env>
+so for example, *run the test suite in py26*::
+
+  tox -e py26
+
+Run One Test
+------------
+
+To run individual tests with tox::
+
+  tox -e <env> -- path.to.module.Class.test
+
+For example, to *run the basic Zuul test*::
+
+  tox -e py27 -- tests.test_scheduler.TestScheduler.test_jobs_launched
+
+To *run one test in the foreground* (after previously having run tox
+to set up the virtualenv)::
+
+  .tox/py27/bin/python -m testtools.run tests.test_scheduler.TestScheduler.test_jobs_launched
+
+Need More Info?
+---------------
+
+More information about testr: https://wiki.openstack.org/wiki/Testr
+
+More information about nose: https://nose.readthedocs.org/en/latest/
+
+
+More information about testing OpenStack code can be found here:
+https://wiki.openstack.org/wiki/Testing