code: def test_process(self):
      act = self.processor(sample_file)
      self.assertTrue(np.allclose(act, sample_key_act))
  
      act = self.processor(sample2_file)
      self.assertTrue(np.allclose(act, sample2_key_act))
  
file_path: madmom/tests/test_features_key.py
imports: from __future__ import absolute_import, division, print_function
  import unittest
  from os.path import join
  from madmom.features import Activations
  from madmom.features.key import *
  from .None import AUDIO_PATH, ACTIVATIONS_PATH
label_desc: Use image node_id 2 for calling the TestCNNKeyRecognitionProcessorClass obj's underlying member method code with example usage: obj.test_process() without return types