code: def test_process(self):
      beats = self.processor(sample_bar_act)
      self.assertTrue(
          np.allclose(
              beats,
              [
                  [0.0913, 1.0],
                  [0.7997, 2.0],
                  [1.4806, 3.0],
                  [2.1478, 1.0],
              ],
          )
      )
  
imports: from __future__ import absolute_import, division, print_function
  import unittest
  from os.path import join
  from madmom.ml.hmm import HiddenMarkovModel
  from madmom.audio.chroma import CLPChroma
  from madmom.features import Activations
  from madmom.features.downbeats import *
  from madmom.models import PATTERNS_BALLROOM
  from .None import ACTIVATIONS_PATH, ANNOTATIONS_PATH, AUDIO_PATH, DETECTIONS_PATH
  from .test_utils import DETECTION_FILES
label_desc: Use image node_id 3 for calling the TestDBNBarTrackingProcessorClass obj's underlying member method code with example usage: obj.test_process() without return types