code: def testZero(self):
      # array of zeros should output zeros
      self.assertEqualVector(
          HighResolutionFeatures()(zeros(120)), [0, 0, 0]
      )
  
imports: from essentia_test import *
label_desc: Use image node_id 2 for calling the TestHighResolutionFeatures obj's underlying member method code with example usage: obj.testZero() without return types