code: def test_concatenate_audioclips_render(util, mono_wave):
      """Concatenated AudioClips through ``concatenate_audioclips`` should return
      a clip that can be rendered to a file.
      """
      filename = os.path.join(
          util.TMP_DIR, "concatenate_audioclips.mp3"
      )
  
      clip_440 = AudioClip(mono_wave(440), duration=0.01, fps=44100)
      clip_880 = AudioClip(mono_wave(880), duration=0.000001, fps=22050)
  
      concat_clip = concatenate_audioclips((clip_440, clip_880))
      concat_clip.write_audiofile(filename, logger=None)
  
      assert (
          concat_clip.duration == clip_440.duration + clip_880.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 3 for calling a global function with example usage: test_concatenate_audioclips_render(util, mono_wave) without return types