code: def testZero(self):
      self.assertEqual(EnergyBand()(zeros(512)), 0)
  
file_path: essentia/test/src/unittests/spectral/test_energyband.py
imports: from essentia_test import *
label_desc: Use image node_id 2 for calling the TestEnergyBand obj's underlying member method code with example usage: obj.testZero() without return types