def test_audio_normalize_muted():
z_array = np.array([0.0])
make_frame = lambda t: z_array
clip = AudioClip(make_frame, duration=1, fps=44100)
clip = audio_normalize(clip)
assert np.array_equal(clip.to_soundarray(), z_array)
close_all_clips(locals())
def test_audio_normalize():
clip = AudioFileClip("media/crunching.mp3")
clip = audio_normalize(clip)
assert clip.max_volume() == 1