code: def test_error(self):
      # num_mel_bins must be positive.
      with self.assertRaises(ValueError):
          signal = array_ops.zeros((2, 3, 0))
          mfcc_ops.mfccs_from_log_mel_spectrograms(signal)
  
file_path: tensorflow-upstream/tensorflow/python/kernel_tests/signal/mfcc_ops_test.py
imports: from absl.testing import parameterized
  from tensorflow.python.eager import context
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import tensor_shape
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import random_ops
  from tensorflow.python.ops.signal import mfcc_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the MFCCTest obj's underlying member method code with example usage: obj.test_error() without return types