docstr: A non-URL string is assumed to be a filename. A file we can't
  open will result in an error.
docstr_tok: ["A","non-URL","string","is","assumed","to","be","a","filename",".","A","file","we","can't","open","will","result","in","an","error","."]
code: def test_st_audio_raises_on_bad_filename(self):
      """A non-URL string is assumed to be a filename. A file we can't
      open will result in an error.
      """
      with self.assertRaises(MediaFileStorageError):
          st.audio("not/a/real/file")
  
imports: import io
  import os
  from io import BytesIO
  import numpy
  from parameterized import parameterized
  from scipy.io import wavfile
  import streamlit
  from streamlit.elements.media import _maybe_convert_to_wav_bytes
  from streamlit.errors import StreamlitAPIException
  from streamlit.proto.Alert_pb2 import Alert
  from streamlit.runtime.media_file_storage import MediaFileStorageError
  from streamlit.runtime.memory_media_file_storage import _calculate_file_id
  from streamlit.web.server.server import MEDIA_ENDPOINT
  from tests.delta_generator_test_case import DeltaGeneratorTestCase
label_desc: Use image node_id 13 for calling the AudioTest obj's underlying member method code with example usage: obj.test_st_audio_raises_on_bad_filename() without return types