code: def testGetProcessorName(self):
      procname = MPI.Get_processor_name()
      self.assertIsInstance(procname, str)
  
imports: from mpi4py import MPI
  import mpiunittest
  import os
label_desc: Use image node_id 5 for calling the TestEnviron obj's underlying member method code with example usage: obj.testGetProcessorName() without return types