code: def test_loop1(self):
      parent = Parent()
      parent.child = parent
      dirname = tempfile.mkdtemp()
  
      # The assertion in PFRL should fail on save().
      # Otherwise it seems to raise OSError: [Errno 63] File name too long
      with self.assertRaises(AssertionError):
          parent.save(dirname)
  
imports: import os
  import tempfile
  import unittest
  import torch
  import pfrl
label_desc: Use image node_id 3 for calling the TestAttributeSavingMixin obj's underlying member method code with example usage: obj.test_loop1() without return types