code: def test_process(self):
      for audio_file, true_activation in zip(
          sample_files, sample_cnn_acts
      ):
          act = self.processor(audio_file)
          self.assertTrue(np.allclose(act, true_activation, rtol=1e-4))
  
imports: from __future__ import absolute_import, division, print_function
  import unittest
  from os.path import join
  from madmom.features import Activations
  from madmom.features.chords import *
  from madmom.io import load_chords
  from .None import ACTIVATIONS_PATH, AUDIO_PATH, DETECTIONS_PATH
label_desc: Use image node_id 2 for calling the TestCNNChordFeatureProcessorClass obj's underlying member method code with example usage: obj.test_process() without return types