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.. _testing_running_locally:
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***************
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Testing Ansible
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***************
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This document describes how to:
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* Run tests locally using ``ansible-test``
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* Extend
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.. contents::
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:local:
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Requirements
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============
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There are no special requirements for running ``ansible-test`` on Python 2.7 or later.
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The ``argparse`` package is required for Python 2.6.
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The requirements for each ``ansible-test`` command are covered later.
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Test Environments
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=================
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Most ``ansible-test`` commands support running in one or more isolated test environments to simplify testing.
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Remote
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------
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The ``--remote`` option runs tests in a cloud hosted environment.
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An API key is required to use this feature.
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Recommended for integration tests.
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See the `list of supported platforms and versions <https://github.com/ansible/ansible/blob/devel/test/lib/ansible_test/_data/completion/remote.txt>`_ for additional details.
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Environment Variables
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---------------------
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When using environment variables to manipulate tests there some limitations to keep in mind. Environment variables are:
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* Not propagated from the host to the test environment when using the ``--docker`` or ``--remote`` options.
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* Not exposed to the test environment unless enabled in ``test/lib/ansible_test/_internal/util.py`` in the ``common_environment`` function.
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Example: ``ANSIBLE_KEEP_REMOTE_FILES=1`` can be set when running ``ansible-test integration --venv``. However, using the ``--docker`` option would
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require running ``ansible-test shell`` to gain access to the Docker environment. Once at the shell prompt, the environment variable could be set
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and the tests executed. This is useful for debugging tests inside a container by following the
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:ref:`Debugging AnsibleModule-based modules <debugging_modules>` instructions.
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Interactive Shell
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=================
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Use the ``ansible-test shell`` command to get an interactive shell in the same environment used to run tests. Examples:
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* ``ansible-test shell --docker`` - Open a shell in the default docker container.
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* ``ansible-test shell --venv --python 3.6`` - Open a shell in a Python 3.6 virtual environment.
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Code Coverage
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=============
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Code coverage reports make it easy to identify untested code for which more tests should
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be written. Online reports are available but only cover the ``devel`` branch (see
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:ref:`developing_testing`). For new code local reports are needed.
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Add the ``--coverage`` option to any test command to collect code coverage data. If you
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aren't using the ``--venv`` or ``--docker`` options which create an isolated python
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environment then you may have to use the ``--requirements`` option to ensure that the
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correct version of the coverage module is installed:
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.. code-block:: shell-session
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ansible-test coverage erase
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ansible-test units --coverage apt
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ansible-test integration --coverage aws_lambda
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ansible-test coverage html
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Reports can be generated in several different formats:
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* ``ansible-test coverage report`` - Console report.
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* ``ansible-test coverage html`` - HTML report.
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* ``ansible-test coverage xml`` - XML report.
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To clear data between test runs, use the ``ansible-test coverage erase`` command. For a full list of features see the online help:
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.. code-block:: shell-session
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ansible-test coverage --help
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