code: def testDefaultFieldValues(self):
      self.assertEqual(self.STATUS.Get_source(), MPI.ANY_SOURCE)
      self.assertEqual(self.STATUS.Get_tag(), MPI.ANY_TAG)
      self.assertEqual(self.STATUS.Get_error(), MPI.SUCCESS)
  
file_path: mpi4py/test/test_status.py
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 3 for calling the TestStatus obj's underlying member method code with example usage: obj.testDefaultFieldValues() without return types