code: def testGetLibraryVersion(self):
      version = MPI.Get_library_version()
      self.assertIsInstance(version, str)
      self.assertGreater(len(version), 0)
  
imports: from mpi4py import MPI
  import mpiunittest
  import os
label_desc: Use image node_id 4 for calling the TestEnviron obj's underlying member method code with example usage: obj.testGetLibraryVersion() without return types