code: def testOneElement(self):
      # input spectrum must be 0.5*framesize
      SC = SpectralContrast(sampleRate=44100)
      self.assertComputeFails(SC, [1])
  
file_path: essentia/test/src/unittests/spectral/test_spectralcontrast.py
imports: from essentia_test import *
label_desc: Use image node_id 8 for calling the TestSpectralContrast obj's underlying member method code with example usage: obj.testOneElement() without return types