code: def test_downbeats(self):
      with self.assertRaises(BeatIntervalError):
          run_script(
              "beats",
              det_suffix=".dbn_downbeat_tracker.txt",
              args=["--down"],
          )
  
file_path: madmom/tests/test_bin_evaluate.py
imports: from __future__ import absolute_import, division, print_function
  import imp
  import os
  import sys
  import unittest
  import numpy
  from .None import ANNOTATIONS_PATH, DETECTIONS_PATH
  from madmom.evaluation.beats import BeatIntervalError
label_desc: Use image node_id 3 for calling the TestEvaluateScript obj's underlying member method code with example usage: obj.test_downbeats() without return types