code: def testZero(self):
      # Inputting zeros should return zero hfc
      hfc = HFC(type="Masri")(zeros(1024))
      self.assertEqual(hfc, 0)
  
      hfc = HFC(type="Jensen")(zeros(1024))
      self.assertEqual(hfc, 0)
  
      hfc = HFC(type="Brossier")(zeros(1024))
      self.assertEqual(hfc, 0)
  
file_path: essentia/test/src/unittests/spectral/test_hfc.py
imports: from essentia_test import *
  from essentia import *
label_desc: Use image node_id 2 for calling the TestHFC obj's underlying member method code with example usage: obj.testZero() without return types