code: def testWhiteNoise(self):
      result = RollOff(cutoff=0.85)([1] * 101)
      self.assertAlmostEqual(result, 44100 / 2 * 0.85)
  
file_path: essentia/test/src/unittests/spectral/test_rolloff.py
imports: from essentia_test import *
label_desc: Use image node_id 4 for calling the TestRollOff obj's underlying member method code with example usage: obj.testWhiteNoise() without return types