code: def test_concatenate_audiofileclips(util):
      clip1 = AudioFileClip("media/crunching.mp3").subclip(1, 4)
  
      # Checks it works with videos as well
      clip2 = AudioFileClip("media/big_buck_bunny_432_433.webm")
      concat_clip = concatenate_audioclips((clip1, clip2))
  
      concat_clip.write_audiofile(
          os.path.join(util.TMP_DIR, "concat_audio_file.mp3"),
          logger=None,
      )
  
      assert concat_clip.duration == clip1.duration + clip2.duration
  
file_path: moviepy/tests/test_AudioClips.py
imports: import os
  import numpy
  import pytest
  from moviepy.audio.AudioClip import AudioArrayClip, AudioClip, CompositeAudioClip, concatenate_audioclips
  from moviepy.audio.io.AudioFileClip import AudioFileClip
label_desc: Use image node_id 7 for calling a global function with example usage: test_concatenate_audiofileclips(util) without return types