code: def testRegression(self):
      filename = join(testdata.audio_dir, "recorded", "distorted.wav")
      audio = MonoLoader(
          filename=filename, downmix="left", sampleRate=44100
      )()
      distortedIntensity = Intensity()(audio)
  
      filename = join(
          testdata.audio_dir, "recorded", "spaceambient.wav"
      )
      audio = MonoLoader(
          filename=filename, downmix="left", sampleRate=44100
      )()
      ambientIntensity = Intensity()(audio)
  
      filename = join(testdata.audio_dir, "recorded", "dubstep.wav")
      audio = MonoLoader(
          filename=filename, downmix="left", sampleRate=44100
      )()
      dubstepIntensity = Intensity()(audio)
  
      self.assertTrue(distortedIntensity > ambientIntensity)
      self.assertTrue(distortedIntensity >= dubstepIntensity)
      self.assertTrue(dubstepIntensity > ambientIntensity)
  
imports: from essentia_test import *
label_desc: Use image node_id 4 for calling the TestIntensity obj's underlying member method code with example usage: obj.testRegression() without return types