code: def testOneSample(self):
      filename = "audiowritertest.wav"
      signal = array([[0.5, 0.3]])
  
      # write the audio file:
      gen = VectorInput(signal)
      writer = AudioWriter(filename=filename)
      gen.data >> writer.audio
      run(gen)
  
      # load the audio file and validate:
      loader = AudioLoader(filename=filename)
      pool = Pool()
  
      loader.audio >> (pool, "audio")
      loader.numberChannels >> None
      loader.sampleRate >> None
      loader.md5 >> None
      loader.bit_rate >> None
      loader.codec >> None
      run(loader)
      os.remove(filename)
      self.compare(pool["audio"], signal)
  
file_path: essentia/test/src/unittests/io/test_audiowriter_streaming.py
imports: from essentia_test import *
  from essentia.streaming import AudioWriter, AudioLoader
  from essentia.streaming import MonoMixer
  import os
label_desc: Use image node_id 5 for calling the TestAudioWriter_Streaming obj's underlying member method code with example usage: obj.testOneSample() without return types