    @Test
    public void transformTest4() throws Exception {

        TupleFilter or = new LogicalTupleFilter(TupleFilter.FilterOperatorEnum.AND);
        TupleFilter a = ConstantTupleFilter.FALSE;
        TupleFilter b = ConstantTupleFilter.FALSE;

        or.addChild(a);
        or.addChild(b);
        or = new FilterOptimizeTransformer().transform(or);
        Assert.assertEquals(ConstantTupleFilter.FALSE, or);
    }