'If journald is unavailable on the machine, ``--journald`` raises a
``UsageError``.'

@skipIf(can_write_to_journald, 'Journald    is    available    on    this    machine.')
def test_journald_unavailable(self):

    @flocker_standard_options
    class MyOptions(Options, ):
        pass
    exc = self.assertRaises(UsageError, MyOptions().parseOptions, ['--journald'])
    self.assertTrue(str(exc).startswith('Journald    unavailable    on    this    machine:    '))
