code: def test_get_set_dir(self):
      previous_hub_dir = torch.hub.get_dir()
      with tempfile.TemporaryDirectory("hub_dir") as tmpdir:
          torch.hub.set_dir(tmpdir)
          self.assertEqual(torch.hub.get_dir(), tmpdir)
          self.assertNotEqual(previous_hub_dir, tmpdir)
  
          hub_model = hub.load(
              "ailzhang/torchhub_example",
              "mnist",
              pretrained=True,
              verbose=False,
          )
          self.assertEqual(
              sum_of_state_dict(hub_model.state_dict()),
              SUM_OF_HUB_EXAMPLE,
          )
          assert os.path.exists(
              os.path.join(tmpdir, "ailzhang_torchhub_example_master")
          )
  
      # Test that set_dir properly calls expanduser()
      # non-regression test for https://github.com/pytorch/pytorch/issues/69761
      new_dir = os.path.join("~", "hub")
      torch.hub.set_dir(new_dir)
      self.assertEqual(torch.hub.get_dir(), os.path.expanduser(new_dir))
  
imports: import unittest
  from unittest.mock import patch
  import os
  import tempfile
  import warnings
  import torch
  import torch.hub
  from torch.testing._internal.common_utils import retry, IS_SANDCASTLE, TestCase
label_desc: Use image node_id 8 for calling the TestHub obj's underlying member method code with example usage: obj.test_get_set_dir() without return types