def METHOD_NAME(self):
    fs = 100  #Hz
    f0 = 100  #Hz
    extent = 5  #Hz
    vibrato = 5 #Hz
    x = [f0] * 1024 + extent * sin(2 * pi * vibrato * arange(1024) / fs)
    vibratoEst, extentEst = Vibrato(sampleRate=fs)(x.astype(float32))
    self.assertAlmostEqual(vibrato,mean(vibratoEst[3:-3]), 1)
    extentCents = 1200*log2((f0+extent)/float(f0-extent))
    self.assertAlmostEqual(extentCents, mean(extentEst[3:-3]), 1e-1)