code: def testZero(self):
      ebr = EnergyBandRatio(
          startFrequency=0.0, stopFrequency=100.0, sampleRate=1
      )
      self.assertEqual(ebr(zeros(1000)), 0)
  
imports: from essentia_test import *
label_desc: Use image node_id 2 for calling the TestEnergyBandRatio obj's underlying member method code with example usage: obj.testZero() without return types