    @Test
    public void basicTest() {

        final Evaluator evaluator = new Evaluator();
        Assert.assertTrue(
                evaluator.evaluate(
                        Equals.builder()
                                .lhs(new ObjectValue("a"))
                                .rhs(new ObjectValue("a"))
                                .build()
                        , node))
        ;
        Assert.assertFalse(
                evaluator.evaluate(
                        Equals.builder()
                                .lhs(new ObjectValue("a"))
                                .rhs(new ObjectValue("b"))
                                .build()
                        , node));
    }