code: def test_value(self):
      result = fft_frequencies(5, 10)
      self.assertTrue(np.allclose(result, [0, 1, 2, 3, 4]))
  
imports: from __future__ import absolute_import, division, print_function
  import sys
  import unittest
  from os.path import join
  from madmom.audio.spectrogram import Spectrogram
  from madmom.audio.stft import *
  from .None import AUDIO_PATH
label_desc: Use image node_id 3 for calling the TestBinFrequenciesFunction obj's underlying member method code with example usage: obj.test_value() without return types