    @Test
    public void testPlus() {

        Assert.assertEquals(Integer.class, ALU.plus(b, b).getClass());
        Assert.assertEquals(Integer.class, ALU.plus(b, s).getClass());
        Assert.assertEquals(Integer.class, ALU.plus(b, i).getClass());
        Assert.assertEquals(Long.class, ALU.plus(b, l).getClass());
        Assert.assertEquals(Float.class, ALU.plus(b, f).getClass());
        Assert.assertEquals(Double.class, ALU.plus(b, d).getClass());
    }