code: def test_audio_count_zero(self):
      shape = (0, self.num_samples, 2)
      audio = np.array([]).reshape(shape).astype(np.float32)
      pb = self.audio("k488", audio, 44100, max_outputs=3)
      self.assertEqual(1, len(pb.value))
      results = tensor_util.make_ndarray(pb.value[0].tensor)
      self.assertEqual(results.shape, (0, 2))
  
imports: import glob
  import os
  import numpy
  import tensorflow
  from tensorboard.compat import tf2
  from tensorboard.plugins.audio import metadata
  from tensorboard.plugins.audio import summary
  from tensorboard.util import tensor_util
label_desc: Use image node_id 8 for calling the SummaryBaseTest obj's underlying member method code with example usage: obj.test_audio_count_zero() without return types