Test plugins evaluate template expressions and return True or False. With test plugins you can create :ref:`conditionals <playbooks_conditionals>` to implement the logic of your tasks, blocks, plays, playbooks, and roles. Ansible uses the `standard tests `_ shipped as part of Jinja, and adds some specialized test plugins. You can :ref:`create custom Ansible test plugins <developing_test_plugins>`.
You can add a custom test plugin by dropping it into a ``test_plugins`` directory adjacent to your play, inside a role, or by putting it in one of the test plugin directory sources configured in :ref:`ansible.cfg <ansible_configuration_settings>`.
.._using_test:
Using test plugins
-------------------
The User Guide offers detailed documentation on :ref:`using test plugins <playbooks_tests>`.
..seealso::
:ref:`about_playbooks`
An introduction to playbooks
:ref:`playbooks_tests`
Using tests
:ref:`playbooks_conditionals`
Using conditional statements
:ref:`filter_plugins`
Filter plugins
:ref:`playbooks_filters`
Using filters
:ref:`lookup_plugins`
Lookup plugins
`User Mailing List <https://groups.google.com/group/ansible-devel>`_
