code: def testZero(self):
      pass
      # Inputting zeros should return null band energies
      fbands = [0, 100, 200, 300, 400, 500, 600, 700, 800]
      scaledbands, cumul = TempoScaleBands()(
          FrequencyBands(frequencyBands=fbands)(zeros(1024))
      )
      self.assertEqualVector(scaledbands, zeros(len(fbands) - 1))
      self.assertEqual(cumul, 0.0)
  
file_path: essentia/test/src/unittests/rhythm/test_temposcalebands.py
imports: from essentia_test import *
label_desc: Use image node_id 3 for calling the TestTempoScaleBands obj's underlying member method code with example usage: obj.testZero() without return types