Test for difference in .add_translation_dirs() with and without .commit()

output

(pyramid)[piotr@demon pyramid]$ nosetests -t test_xxx
E
======================================================================
ERROR: test_xxx (pyramid.tests.test_config.test_i18n.TestI18NConfiguratorMixin)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/piotr/projects/pyramid/pyramid/tests/test_config/test_i18n.py", line 95, in test_xxx
    dirs = config.registry.getUtility(ITranslationDirectories)
  File "/home/piotr/.virtualenvs/pyramid/lib/python2.7/site-packages/zope/interface/registry.py", line 172, in getUtility
    raise ComponentLookupError(provided, name)
ComponentLookupError: (<InterfaceClass pyramid.interfaces.ITranslationDirectories>, u'')

----------------------------------------------------------------------
Ran 1 test in 0.015s

FAILED (errors=1)

test_i18n.py

    # def test_add_translation_dirs_abspath(self):
    #     from pyramid.interfaces import ITranslationDirectories
    #     config = self._makeOne(autocommit=True)
    #     config.add_translation_dirs(locale)
    #     self.assertEqual(config.registry.getUtility(ITranslationDirectories),
    #                     [locale])


    def test_xxx(self):
        from pyramid.interfaces import ITranslationDirectories
        config = self._makeOne()
        config.add_translation_dirs('pyramid.tests.pkgs.localeapp:locale')
        dirs = config.registry.getUtility(ITranslationDirectories)