def METHOD_NAME(self):
    f0 = 110
    freqs = [-6, -4.9, -4.2, -4, -3.5, -2.0, -1.0, -0.75, -0.5]
    freqs = [freq*f0 for freq in freqs]
    mags = ones(len(freqs))
    self.assertComputeFails(HarmonicPeaks(), freqs, mags, f0)