code: def test_fourier_tempo_frequencies(sr, hop_length, win_length):
      freqs = librosa.fourier_tempo_frequencies(
          sr=sr, hop_length=hop_length, win_length=win_length
      )
  
      # DC
      assert freqs[0] == 0
  
      # Nyquist, positive here for more convenient display purposes
      assert freqs[-1] == sr * 60 / 2.0 / hop_length
  
      # Ensure that the frequencies increase linearly
      dels = np.diff(freqs)
      assert np.allclose(dels, dels[0])
  
imports: import os
  import sys
  import warnings
  import librosa
  import numpy
  import pytest
label_desc: Use image node_id 24 for calling a global function with example usage: test_fourier_tempo_frequencies(sr, hop_length, win_length) without return types