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Cinder Style Commandments

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.