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ignores
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=======
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Sanity tests for individual files can be skipped, and specific errors can be ignored.
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When to Ignore Errors
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---------------------
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Sanity tests are designed to improve code quality and identify common issues with content.
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When issues are identified during development, those issues should be corrected.
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As development of Ansible continues, sanity tests are expanded to detect issues that previous releases could not.
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To allow time for existing content to be updated to pass newer tests, ignore entries can be added.
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New content should not use ignores for existing sanity tests.
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When code is fixed to resolve sanity test errors, any relevant ignores must also be removed.
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If the ignores are not removed, this will be reported as an unnecessary ignore error.
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This is intended to prevent future regressions due to the same error recurring after being fixed.
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When to Skip Tests
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------------------
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Although rare, there are reasons for skipping a sanity test instead of ignoring the errors it reports.
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If a sanity test results in a traceback when processing content, that error cannot be ignored.
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If this occurs, open a new `bug report <https://github.com/ansible/ansible/issues/new?template=bug_report.md>`_ for the issue so it can be fixed.
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If the traceback occurs due to an issue with the content, that issue should be fixed.
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If the content is correct, the test will need to be skipped until the bug in the sanity test is fixed.
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Caution should be used when skipping sanity tests instead of ignoring them.
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Since the test is skipped entirely, resolution of the issue will not be automatically detected.
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This will prevent prevent regression detection from working once the issue has been resolved.
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For this reason it is a good idea to periodically review skipped entries manually to verify they are required.
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Ignore File Location
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--------------------
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The location of the ignore file depends on the type of content being tested.
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Ansible Collections
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~~~~~~~~~~~~~~~~~~~
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Since sanity tests change between Ansible releases, a separate ignore file is needed for each Ansible major release.
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The filename is ``tests/sanity/ignore-X.Y.txt`` where ``X.Y`` is the Ansible release being used to test the collection.
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Maintaining a separate file for each Ansible release allows a collection to pass tests for multiple versions of Ansible.
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Ansible
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~~~~~~~
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When testing Ansible, all ignores are placed in the ``test/sanity/ignore.txt`` file.
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Only a single file is needed because ``ansible-test`` is developed and released as a part of Ansible itself.
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Ignore File Format
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------------------
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The ignore file contains one entry per line.
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Each line consists of two columns, separated by a single space.
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Comments may be added at the end of an entry, started with a hash (``#``) character, which can be proceeded by zero or more spaces.
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Blank and comment only lines are not allowed.
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The first column specifies the file path that the entry applies to.
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File paths must be relative to the root of the content being tested.
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This is either the Ansible source or an Ansible collection.
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File paths cannot contain a space or the hash (``#``) character.
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The second column specifies the sanity test that the entry applies to.
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This will be the name of the sanity test.
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If the sanity test is specific to a version of Python, the name will include a dash (``-``) and the relevant Python version.
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If the named test uses error codes then the error code to ignore must be appended to the name of the test, separated by a colon (``:``).
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Below are some example ignore entries for an Ansible collection::
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roles/my_role/files/my_script.sh shellcheck:SC2154 # ignore undefined variable
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plugins/modules/my_module.py validate-modules:E105 # ignore license check
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plugins/modules/my_module.py import-3.8 # needs update to support collections.abc on Python 3.8+
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It is also possible to skip a sanity test for a specific file.
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This is done by adding ``!skip`` after the sanity test name in the second column.
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When this is done, no error code is included, even if the sanity test uses error codes.
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Below are some example skip entries for an Ansible collection::
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plugins/module_utils/my_util.py validate-modules!skip # waiting for bug fix in module validator
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plugins/lookup/my_plugin.py compile-2.6!skip # Python 2.6 is not supported on the controller
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Ignore File Errors
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------------------
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There are various errors that can be reported for the ignore file itself:
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- syntax errors parsing the ignore file
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- references a file path that does not exist
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- references to a sanity test that does not exist
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- ignoring an error that does not occur
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- ignoring a file which is skipped
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- duplicate entries
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