code: def test_spectral_roll_off(self):
      np.testing.assert_almost_equal(spectral_roll_off(const0, Fs), 0.0)
      np.testing.assert_almost_equal(spectral_roll_off(const1, Fs), 0.0)
      np.testing.assert_almost_equal(
          spectral_roll_off(constNeg, Fs), 0.0
      )
      np.testing.assert_almost_equal(spectral_roll_off(constF, Fs), 0.0)
      np.testing.assert_almost_equal(spectral_roll_off(lin, Fs), 450.0)
      np.testing.assert_almost_equal(
          spectral_roll_off(lin0, Fs), 450.0, decimal=5
      )
      np.testing.assert_almost_equal(
          spectral_roll_off(wave, Fs), 5.0, decimal=5
      )
      np.testing.assert_almost_equal(
          spectral_roll_off(offsetWave, Fs), 5.0, decimal=5
      )
      np.testing.assert_almost_equal(
          spectral_roll_off(noiseWave, Fs), 465.0, decimal=5
      )
  
imports: import unittest
  import numpy
  from tsfel.feature_extraction.features import *
label_desc: Use image node_id 47 for calling the TestFeatures obj's underlying member method code with example usage: obj.test_spectral_roll_off() without return types