code: def testZero(self):
      sampleRate = 44100
      input = [0.0] * int(sampleRate * 1)
      replayGainDiff = ReplayGain(sampleRate=sampleRate)(input)
      dbSilence = -100  # by definition in essentiamath
      loudness_ref = -31.492595672607422
      self.assertAlmostEqual(replayGainDiff, loudness_ref - dbSilence)
  
imports: from essentia_test import *
label_desc: Use image node_id 1 for calling the TestReplayGain obj's underlying member method code with example usage: obj.testZero() without return types