def METHOD_NAME(self):
    data = self.ifg_single.X[0]
    fft = IRFFT(dx=dx)
    fft(data)
    stored_phase = fft.phase
    zpd = fft.zpd
    fft_stored = IRFFT(dx=dx, phase_corr=PhaseCorrection.STORED)
    fft_stored(data, phase=stored_phase, zpd=zpd)
    np.testing.assert_array_equal(fft.spectrum, fft_stored.spectrum)
    np.testing.assert_array_equal(fft.phase, fft_stored.phase)