code: def test_background_no_file():
      muda.deformers.BackgroundNoise(
          files="does-not-exist.ogg", n_samples=1
      )
  
imports: from copy import deepcopy
  import re
  import six
  import numpy
  import soundfile
  import jams
  import librosa
  import muda
  import pytest
  import scipy
  from contextlib import contextmanager
label_desc: Use image node_id 29 for calling a global function with example usage: test_background_no_file() without return types