code: def test_diff_nods(path=None, otherpath=None):
      ds = Dataset(path).create()
      assert_result_count(
          ds.diff(
              path=otherpath,
              on_failure="ignore",
              result_renderer="disabled",
          ),
          1,
          status="error",
          message="path not underneath this dataset",
      )
      otherds = Dataset(otherpath).create()
      assert_result_count(
          ds.diff(
              path=otherpath,
              on_failure="ignore",
              result_renderer="disabled",
          ),
          1,
          path=otherds.path,
          status="error",
          message=(
              "dataset containing given paths is not underneath the "
              "reference dataset %s: %s",
              ds,
              otherds.path,
          ),
      )
  
imports: import os
  import os.path
  from unittest.mock import patch
  import datalad.utils
  from datalad.api import create, diff, save
  from datalad.cmd import GitWitlessRunner, StdOutCapture
  from datalad.consts import PRE_INIT_COMMIT_SHA
  from datalad.distribution.dataset import Dataset
  from datalad.support.exceptions import NoDatasetFound
  from datalad.tests.utils_pytest import DEFAULT_BRANCH, OBSCURE_FILENAME, SkipTest, assert_in, assert_raises, assert_repo_status, assert_result_count, assert_status, chpwd, create_tree, eq_, get_deeply_nested_structure, has_symlink_capability, known_failure_githubci_win, neq_, ok_, with_tempfile
  from datalad.utils import Path
label_desc: Use image node_id 7 for calling a global function with example usage: test_diff_nods(path, otherpath) without return types