code: def testZero(self):
      self.assertAlmostEqual(
          OddToEvenHarmonicEnergyRatio()([0], [0]), 1
      )
      self.assertAlmostEqual(
          OddToEvenHarmonicEnergyRatio()([1], [0]), 1
      )
  
file_path: essentia/test/src/unittests/tonal/test_oddtoevenharmonicenergyratio.py
imports: from essentia_test import *
label_desc: Use image node_id 3 for calling the TestOddToEvenHarmonicEnergyRatio obj's underlying member method code with example usage: obj.testZero() without return types