def METHOD_NAME(self, mocked_init):
    lm_aprun = APRun('', {}, None, None, None)
    command = lm_aprun.get_rank_cmd()
    self.assertIn('$MPI_RANK',    command)
    self.assertIn('$PMIX_RANK',   command)
    self.assertIn('$ALPS_APP_PE', command)