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)()
      self.assertEqualVector(
          MonoMixer(type="left")(loader[0], loader[2]), []
      )
  
file_path: essentia/test/src/unittests/standard/test_monomixer.py
imports: from essentia_test import *
  from essentia import *
  from numpy import sum
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