The ExtensionTestCase class is a special test case base class for

Review Board extensions. It exposes the models of the extension via

the models attribute on instances of the sub-class.
To run tests on the extension, execute

./reviewboard/manage.py test -- extension.tests

where extensions.test is the module containing the tests.

Created an extension with a model. Subclassed ExtensionTestCase

and created test methods that passed on that subclass.