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+.. _test_plugins:
+
+Test plugins
+=============
+
+.. contents::
+   :local:
+   :depth: 2
+
+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>`.
+
+
+.. _enabling_test:
+
+Enabling 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
+-------------------
+
+You can use tests anywhere you can use templating in Ansible: in a play, in variables file, or in a Jinja2 template for the :ref:`template <template_module>` module. For more information on using test plugins, see :ref:`playbooks_tests`.
+
+Tests always return ``True`` or ``False``, they are always a boolean, if you need a different return type, you should be looking at filters.
+
+You can recognize test plugins by the use of the ``is`` statement in a template, they can also be used as part of the ``select`` family of filters.
+
+.. code-block:: YAML+Jinja
+
+  vars:
+    is_ready: '{{ task_result is success }}'
+
+  tasks:
+  - name: conditionals are always in 'template' context
+    action: dostuff
+    when: task_result is failed
+
+Tests will always have an ``_input`` and this is normally what is on the left side of ``is``. Tests can also take additional parameters as you would to most programming functions. These parameters can be either ``positional`` (passed in order) or ``named`` (passed as key=value pairs). When passing both types, positional arguments should go first.
+
+.. code-block:: YAML+Jinja
+
+  tasks:
+  - name: pass positional parameter to match test
+    action: dostuff
+    when: myurl is match("https://example.com/users/.*/resources")
+
+  - name: pass named parameter to truthy test
+    action: dostuff
+    when: myvariable is truthy(convert_bool=True)
+
+  - name: pass both types to 'version' test
+    action: dostuff
+    when: sample_semver_var is version('2.0.0-rc.1+build.123', 'lt', version_type='semver')
+
+
+Using test plugins with lists
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+As mentioned above, one way to use tests is with the ``select`` familiy of filters (``select``, ``reject``, ``selectattr``, ``rejectattr``).
+
+.. code-block:: YAML+Jinja
+
+   # give me only defined variables from a list of variables, using 'defined' test
+   good_vars: "{{ all_vars|select('defined') }}"
+
+   # this uses the 'equalto' test to filter out non 'fixed' type of addresses from a list
+   only_fixed_addresses:  "{{ all_addresses|selectattr('type', 'equalsto', 'fixed') }}"
+
+   # this does the opposite of the previous one
+   only_fixed_addresses:  "{{ all_addresses|rejectattr('type', 'equalsto', 'fixed') }}"
+
+
+Plugin list
+-----------
+
+You can use ``ansible-doc -t filter -l`` to see the list of available plugins. Use ``ansible-doc -t filter <plugin name>`` to see specific documents and examples.
+
+
+
+.. 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_tests`
+       Using tests
+   :ref:`lookup_plugins`
+       Lookup plugins
+   `User Mailing List <https://groups.google.com/group/ansible-devel>`_
+       Have a question?  Stop by the google group!
+   :ref:`communication_irc`
+       How to join Ansible chat channels