code: def testOne(self):
      # Checks for a single value
      # self.assertEqual(Spectrum()([1]),  [1])
      self.assertComputeFails(Spectrum(), [1])
  
file_path: essentia/test/src/unittests/standard/test_spectrum.py
imports: from essentia_test import *
label_desc: Use image node_id 7 for calling the TestSpectrum obj's underlying member method code with example usage: obj.testOne() without return types