code: def testEmpty(self):
      # Test that FrequencyBands on an empty vector should return null band energies
      self.assertComputeFails(TempoScaleBands(), [])
  
file_path: essentia/test/src/unittests/rhythm/test_temposcalebands.py
imports: from essentia_test import *
label_desc: Use image node_id 5 for calling the TestTempoScaleBands obj's underlying member method code with example usage: obj.testEmpty() without return types