code: def test_audio_dataset_from_directory_no_audio(self):
      directory = self._prepare_directory(num_classes=2, count=0)
      with self.assertRaisesRegex(
          ValueError, "No audio files found in directory"
      ):
          _ = audio_dataset_utils.audio_dataset_from_directory(
              directory
          )
  
imports: import os
  import numpy
  from keras import testing
  from keras.utils import audio_dataset_utils
  from keras.utils.module_utils import tensorflow
label_desc: Use image node_id 11 for calling the AudioDatasetFromDirectoryTest obj's underlying member method code with example usage: obj.test_audio_dataset_from_directory_no_audio() without return types