Update contributor/tempest_tests.rst
Add steps for installation of tempest plugin and for verifying the same.
@@ -11,8 +11,32 @@ information can be found in its `docs`_.
In simple words: if you have installed manila project on the same machine as
tempest, then tempest will find it.
+In case the plugin is not installed (see the verification steps below),
+you can clone and install it yourself.
+
+.. code-block:: console
+
+ $ git clone https://git.openstack.org/openstack/manila-tempest-plugin
+ $ pip install -e manila-tempest-plugin
+
.. _docs: https://docs.openstack.org/tempest/latest/plugin.html#using-plugins
+Verifying installation
+----------------------
+To verify that the plugin is installed on your system, run the following
+command and find "manila_tests" in its output.
+
+.. code-block:: console
+
+ $ tempest list-plugins
+
+Alternatively, or to double-check, list all the tests available on the system
+and find manila tests in it.
+
+.. code-block:: console
+
+ $ tempest run -l
+
Configuration of manila-related tests in tempest.conf
-----------------------------------------------------
All config options for manila are defined in ``manila_tempest_tests/config.py``
