code: def test_open_same_path_should_use_cache(self):
      import cv2  # noqa: F401
  
      # un-cached open
      with patch("cv2.imread") as mock_cv2_imread:
          self.open_instance(pd.DataFrame([self.image_file_path]))
          mock_cv2_imread.assert_called_once_with(self.image_file_path)
  
      # cached open
      with patch("cv2.imread") as mock_cv2_imread:
          self.open_instance(pd.DataFrame([self.image_file_path]))
          mock_cv2_imread.assert_not_called()
  
file_path: evadb/test/integration_tests/long/functions/ndarray/test_open.py
imports: import unittest
  from test.util import create_sample_image
  import numpy
  import pandas
  import pytest
  from mock import patch
  from evadb.functions.ndarray.open import Open
  from evadb.utils.generic_utils import try_to_import_cv2
label_desc: Use image node_id 4 for calling the OpenTests obj's underlying member method code with example usage: obj.test_open_same_path_should_use_cache() without return types