code: def test_mfcc_empty(self):
      # Passing in an empty tensor should result in an error
      self.assertRaises(AssertionError, kaldi.mfcc, torch.empty(0))
  
file_path: audio/test/torchaudio_unittest/compliance/kaldi/legacy_test.py
imports: import torch
  import torchaudio.compliance.kaldi
  from torchaudio_unittest import common_utils
label_desc: Use image node_id 3 for calling the Test_Kaldi obj's underlying member method code with example usage: obj.test_mfcc_empty() without return types