ansible/docs/docsite/rst/dev_guide/testing_running_locally.rst
2020-02-24 14:29:22 -05:00

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