code: def test_process_path(self):
      root_directory = self.get_tempdir()
      with mock.patch.object(paths, "get_unique_id") as mock_unique_id:
          mock_unique_id.return_value = ("test",)
          path = paths.process_path(root_directory, "foo", "bar")
      self.assertEqual(path, f"{root_directory}/test/foo/bar")
  
file_path: acme/acme/utils/paths_test.py
imports: from unittest import mock
  from acme.testing import test_utils
  import acme.utils.paths
  from absl.testing import absltest
label_desc: Use image node_id 1 for calling the PathTest obj's underlying member method code with example usage: obj.test_process_path() without return types