'I\'m not entirely sure about the mocking, so test that.'

@mock_gettext
def test_mocked_gettext(self):

    from django.utils.translation import ugettext as _
    with uselocale('en-US'):
        eq_(_('Hello'), 'Hello')
    with uselocale('fr'):
        eq_(_('Hello'), 'Bonjour')
    with uselocale('es'):
        eq_(_('Hello'), 'Hola')
