code: def testNewEmpty(self):
      buffer = MPI.buffer
      buf = buffer()
      self.assertEqual(buf.address, 0)
      self.assertIsNone(buf.obj)
      self.assertEqual(buf.nbytes, 0)
      self.assertFalse(buf.readonly)
      self.assertEqual(buf.format, "B")
      self.assertEqual(buf.itemsize, 1)
      self.assertEqual(len(buf), 0)
      buf[:] = 0
      buf[:] = buffer()
      m = memoryview(buf)
      self.assertEqual(m.format, "B")
      self.assertEqual(m.itemsize, 1)
      self.assertEqual(m.ndim, 1)
      self.assertIs(m.readonly, False)
      self.assertEqual(m.shape, (0,))
      self.assertEqual(m.strides, (1,))
      self.assertEqual(m.tobytes(), b"")
      self.assertEqual(m.tolist(), [])
      buf.release()
      self.assertEqual(buf.address, 0)
      self.assertEqual(buf.nbytes, 0)
      self.assertFalse(buf.readonly)
  
file_path: mpi4py/test/test_buffer.py
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 1 for calling the TestBuffer obj's underlying member method code with example usage: obj.testNewEmpty() without return types