class_docstr: A unittest class for testing the HighConfidence postprocessor.
code: def test_check_params(self):
      with self.assertRaises(ValueError):
          _ = HighConfidence(cutoff=-0.6)
  
file_path: adversarial-robustness-toolbox/tests/defences/test_high_confidence.py
imports: import logging
  import unittest
  import numpy
  from art.defences.postprocessor import HighConfidence
  from art.utils import load_dataset
  from tests.utils import master_seed, get_image_classifier_kr_tf, get_image_classifier_kr_tf_binary
label_desc: Use image node_id 7 for calling the TestHighConfidence obj's underlying member method code with example usage: obj.test_check_params() without return types