docstr: When attempted to save into a non-existing dir, error message must contain the file path.
docstr_tok: ["When","attempted","to","save","into","a","non-existing","dir",",","error","message","must","contain","the","file","path","."]
code: def test_save_fail(self):
      """
      When attempted to save into a non-existing dir, error message must contain the file path.
      """
      path = os.path.join("non_existing_directory", "foo.wav")
      with self.assertRaisesRegex(RuntimeError, path):
          self._save(path, torch.zeros(1, 1), 8000)
  
imports: import io
  import os
  import pathlib
  import subprocess
  import sys
  from functools import partial
  from typing import Optional
  import torch
  from parameterized import parameterized
  from torchaudio._backend.ffmpeg import _parse_save_args
  from torchaudio._backend.utils import get_save_func
  from torchaudio.io import CodecConfig
  from torchaudio_unittest.backend.dispatcher.sox.common import get_enc_params, name_func
  from torchaudio_unittest.common_utils import disabledInCI, get_wav_data, load_wav, nested_params, PytorchTestCase, save_wav, skipIfNoExec, skipIfNoFFmpeg, TempDirMixin, TorchaudioTestCase
label_desc: Use image node_id 1 for calling the TestSaveNonExistingDirectory obj's underlying member method code with example usage: obj.test_save_fail() without return types