code: def testZero(self):
      # Inputting zeros should return null band energies
      bbands = BarkBands()
      self.assert_(all(bbands(zeros(1024)) == 0))
      self.assert_(all(bbands(zeros(10)) == 0))
  
imports: from essentia_test import *
label_desc: Use image node_id 3 for calling the TestBarkBands obj's underlying member method code with example usage: obj.testZero() without return types