code: def testEmpty(self):
      inputFilename = join(
          testdata.audio_dir, "generated", "empty", "empty.aiff"
      )
      # NOTE: AudioLoader will through exception on "empty.wav" complaining that
      # it cannot read stream info, using "empty.aiff" therefore...
      loader = AudioLoader(filename=inputFilename)
      mixer = MonoMixer(type="left")
      pool = Pool()
  
      loader.audio >> mixer.audio
      mixer.audio >> (pool, "mix")
      loader.numberChannels >> mixer.numberChannels
      loader.sampleRate >> None
      loader.md5 >> None
      loader.bit_rate >> None
      loader.codec >> None
      run(loader)
      self.assertEqualVector(pool.descriptorNames(), [])
  
file_path: essentia/test/src/unittests/standard/test_monomixer_streaming.py
imports: from essentia_test import *
  from essentia.streaming import MonoMixer, AudioLoader
label_desc: Use image node_id 6 for calling the TestMonoMixer_Streaming obj's underlying member method code with example usage: obj.testEmpty() without return types