def METHOD_NAME():
    t = Time([1, 2, 3], format="cxcsec")
    assert t.masked is False
    assert np.all(t.mask == [False, False, False])
    # Before masking, format output is not a masked array (it is an ndarray
    # like always)
    assert not isinstance(t.value, np.ma.MaskedArray)
    assert not isinstance(t.unix, np.ma.MaskedArray)
    t[2] = np.ma.masked
    assert t.masked is True
    assert np.all(t.mask == [False, False, True])
    assert allclose_sec(t.value[:2], [1, 2])
    assert is_masked(t.value[2])
    assert is_masked(t[2].value)
    # After masking format output is a masked array
    assert isinstance(t.value, np.ma.MaskedArray)
    assert isinstance(t.unix, np.ma.MaskedArray)
    # TODO : test all formats