code: def fixture_decode_wav():
      """fixture_decode_wav"""
      path = os.path.join(
          os.path.dirname(os.path.abspath(__file__)),
          "test_audio",
          "ZASFX_ADSR_no_sustain.wav",
      )
      content = tf.io.read_file(path)
  
      audio = tf.audio.decode_wav(tf.io.read_file(path))
      value = audio.audio * (1 << 15)
      value = tf.cast(value, tf.int16)
  
      args = content
      func = lambda e: tfio.audio.decode_wav(e, dtype=tf.int16)
      expected = value
  
      return args, func, expected
  
imports: import os
  import sys
  import pytest
  import numpy
  import tensorflow
  import tensorflow_io
label_desc: Use image node_id 6 for calling a global function with example usage: fixture_decode_wav() and returns: args,  func,  expected