cinder/HACKING.rst

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Cinder Style Commandments
=========================
- Step 1: Read the OpenStack Style Commandments
http://docs.openstack.org/developer/hacking/
- Step 2: Read on
Cinder Specific Commandments
----------------------------
General
-------
- Use 'raise' instead of 'raise e' to preserve original traceback or exception being reraised::
except Exception as e:
...
raise e # BAD
except Exception:
...
raise # OKAY
Creating Unit Tests
-------------------
For every new feature, unit tests should be created that both test and
(implicitly) document the usage of said feature. If submitting a patch for a
bug that had no unit test, a new passing unit test should be added. If a
submitted bug fix does have a unit test, be sure to add a new one that fails
without the patch and passes with the patch.
Cinder is transitioning to use mock, rather than mox, and so new tests should
use mock only.
For more information on creating unit tests and utilizing the testing
infrastructure in OpenStack Cinder, please read the Cinder testing
`README.rst <https://github.com/openstack/cinder/blob/master/cinder/testing/README.rst>`_.