'L{_makeRunner} returns a L{DistTrialRunner} instance when the C{--jobs}
option is passed, and passes the C{workerNumber} and C{workerArguments}
parameters to it.'

def test_jobs(self):

    self.options.parseOptions(['--jobs', '4', '--force-gc'])
    runner = trial._makeRunner(self.options)
    self.assertIsInstance(runner, DistTrialRunner)
    self.assertEqual(4, runner._workerNumber)
    self.assertEqual(['--force-gc'], runner._workerArguments)
