docstr: Returns native dtype when normalize=False else float32
code: def test_wav(
      self, dtype, sample_rate, num_channels, normalize, channels_first
  ):
      """Returns native dtype when normalize=False else float32"""
      self.assert_dtype(
          "wav",
          dtype,
          sample_rate,
          num_channels,
          normalize,
          channels_first,
      )
  
imports: import os
  import tarfile
  from unittest.mock import patch
  import torch
  from parameterized import parameterized
  from torchaudio._internal import module_utils
  from torchaudio.backend import soundfile_backend
  from torchaudio_unittest.common_utils import get_wav_data, load_wav, normalize_wav, PytorchTestCase, save_wav, skipIfNoModule, TempDirMixin
  from .common import dtype2subtype, parameterize, skipIfFormatNotSupported
label_desc: Use image node_id 2 for calling the MockedLoadTest obj's underlying member method code with example usage: obj.test_wav(dtype, sample_rate, num_channels, normalize, channels_first) without return types