code: def testCommSpawn(self):
      self.COMM.Barrier()
      child = self.COMM.Spawn(
          self.COMMAND,
          self.ARGS,
          self.MAXPROCS,
          info=self.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, self.MAXPROCS)
  
imports: from mpi4py import MPI
  import mpiunittest
  import sys, os, mpi4py
label_desc: Use image node_id 1 for calling the BaseTestSpawnSingle obj's underlying member method code with example usage: obj.testCommSpawn() without return types