def METHOD_NAME():
    from mahotas.morph import circle_se
    for r in (4,5):
        c = circle_se(r)
        assert len(c) == (2*r + 1)
        assert len(c) == len(c.T)
        assert not c.all()
        assert c.any()
    with pytest.raises(ValueError):
        circle_se(-1)