def METHOD_NAME(fullstack_icrs, fullstack_fiducial_altaz):
    """
    Test the full transform from ICRS <-> AltAz
    """
    aacoo = fullstack_icrs.transform_to(fullstack_fiducial_altaz)
    # make sure the round-tripping works
    icrs2 = aacoo.transform_to(ICRS())
    npt.assert_allclose(fullstack_icrs.ra.deg, icrs2.ra.deg)
    npt.assert_allclose(fullstack_icrs.dec.deg, icrs2.dec.deg)