code: def testCommSpawn(self):
      self.COMM.Barrier()
      count = 2 + (self.COMM.Get_size() == 0)
      COMMAND = [self.COMMAND] * count
      ARGS = [self.ARGS] * len(COMMAND)
      MAXPROCS = [self.MAXPROCS] * len(COMMAND)
      INFO = [self.INFO] * len(COMMAND)
      child = self.COMM.Spawn_multiple(
          COMMAND,
          ARGS,
          MAXPROCS,
          info=INFO,
          root=self.ROOT,
      )
      local_size = child.Get_size()
      remote_size = child.Get_remote_size()
      child.Barrier()
      child.Disconnect()
      self.COMM.Barrier()
      self.assertEqual(local_size, self.COMM.Get_size())
      self.assertEqual(remote_size, sum(MAXPROCS))
  
imports: from mpi4py import MPI
  import mpiunittest
  import sys, os, mpi4py
label_desc: Use image node_id 1 for calling the BaseTestSpawnMultiple obj's underlying member method code with example usage: obj.testCommSpawn() without return types