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REVIEWING.rst

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Reviewing Tempest Code

To start read the OpenStack Common Review Checklist

Ensuring code is executed

For any new or change to a test it has to be verified in the gate. This means that the first thing to check with any change is that a gate job actually runs it. Tests which aren't executed either because of configuration or skips should not be accepted.

Unit Tests

For any change that adds new functionality to either common functionality or an out-of-band tool unit tests are required. This is to ensure we don't introduce future regressions and to test conditions which we may not hit in the gate runs. Tests, and service clients aren't required to have unit tests since they should be self verifying by running them in the gate.

API Stability

Tests should only be added for a published stable APIs. If a patch contains tests for an API which hasn't been marked as stable or for an API that which doesn't conform to the API stability guidelines then it should not be approved.

Reject Copy and Paste Test Code

When creating new tests that are similar to existing tests it is tempting to simply copy the code and make a few modifications. This increases code size and the maintenance burden. Such changes should not be approved if it is easy to abstract the duplicated code into a function or method.

Being explicit

When tests are being added that depend on a configurable feature or extension, polling the API to discover that it is enabled should not be done. This will just result in bugs being masked because the test can be skipped automatically. Instead the config file should be used to determine whether a test should be skipped or not. Do not approve changes that depend on an API call to determine whether to skip or not.

Test Documentation

When a new test is being added refer to the :ref:`TestDocumentation` section in hacking to see if the requirements are being met. With the exception of a class level docstring linking to the API ref doc in the API tests and a docstring for scenario tests this is up to the reviewers discretion whether a docstring is required or not.

When to approve

  • Every patch needs two +2s before being approved.
  • Its ok to hold off on an approval until a subject matter expert reviews it
  • If a patch has already been approved but requires a trivial rebase to merge, you do not have to wait for a second +2, since the patch has already had two +2s.