'Internals are never mutable.'

def test_immutable_input(self):

    jds = np.array([2450000.5], dtype=np.double)
    t = Time(jds, format='jd', scale='tai')
    assert allclose_jd(t.jd, jds)
    jds[0] = 2458654
    assert (not allclose_jd(t.jd, jds))
    mjds = np.array([50000.0], dtype=np.double)
    t = Time(mjds, format='mjd', scale='tai')
    assert allclose_jd(t.jd, [2450000.5])
    mjds[0] = 0.0
    assert allclose_jd(t.jd, [2450000.5])
