code: def test_array_values(self):
      input_data = {"img": [[0, 1], [1, 2]], "seg": [[0, 1], [1, 2]]}
      result = CopyItemsd(keys="img", times=1, names="img_1")(
          input_data
      )
      self.assertTrue("img_1" in result)
      result["img_1"][0][0] += 1
      np.testing.assert_allclose(result["img"], [[0, 1], [1, 2]])
      np.testing.assert_allclose(result["img_1"], [[1, 1], [1, 2]])
  
file_path: MONAI/tests/test_copy_itemsd.py
imports: from __future__ import annotations
  import unittest
  import numpy
  import torch
  from parameterized import parameterized
  from monai.networks import eval_mode
  from monai.transforms import CopyItemsd
  from monai.utils import ensure_tuple
  from tests.utils import assert_allclose
label_desc: Use image node_id 4 for calling the TestCopyItemsd obj's underlying member method code with example usage: obj.test_array_values() without return types