keystone/HACKING.rst
2017-10-06 16:10:56 +00:00

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Keystone Style Commandments
===========================
- Step 1: Read the OpenStack Style Commandments
https://docs.openstack.org/hacking/latest/
- Step 2: Read on
Keystone Specific Commandments
------------------------------
- Avoid using "double quotes" where you can reasonably use 'single quotes'
TODO vs FIXME
-------------
- TODO(name): implies that something should be done (cleanup, refactoring,
etc), but is expected to be functional.
- FIXME(name): implies that the method/function/etc shouldn't be used until
that code is resolved and bug fixed.
Logging
-------
Use the common logging module, and ensure you ``getLogger``::
from oslo_log import log
LOG = log.getLogger(__name__)
LOG.debug('Foobar')
AssertEqual argument order
--------------------------
assertEqual method's arguments should be in ('expected', 'actual') order.
Properly Calling Callables
--------------------------
Methods, functions and classes can specify optional parameters (with default
values) using Python's keyword arg syntax. When providing a value to such a
callable we prefer that the call also uses keyword arg syntax. For example::
def f(required, optional=None):
pass
# GOOD
f(0, optional=True)
# BAD
f(0, True)
This gives us the flexibility to re-order arguments and more importantly
to add new required arguments. It's also more explicit and easier to read.
Testing
-------
keystone uses testtools and stestr for its unittest suite and its test
runner. If you'd like to learn more in depth:
https://testtools.readthedocs.io/en/latest/
https://stestr.readthedocs.io/en/latest/