code: def test_process(self):
      downbeat_act = self.processor(sample_file)
      self.assertTrue(
          np.allclose(downbeat_act, sample_downbeat_act, atol=1e-5)
      )
  
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 2 for calling the TestRNNDownBeatProcessorClass obj's underlying member method code with example usage: obj.test_process() without return types