code: def test_identity(self):
      for p in TEST_NDARRAYS:
          img = p(self.imt)
          identity = mt.RandIdentity()
          assert_allclose(img, identity(img))
  
file_path: MONAI/tests/test_randidentity.py
imports: from __future__ import annotations
  import unittest
  import monai.transforms
  from monai.data import CacheDataset
  from tests.utils import TEST_NDARRAYS, NumpyImageTestCase2D, assert_allclose
label_desc: Use image node_id 1 for calling the TestIdentity obj's underlying member method code with example usage: obj.test_identity() without return types