assertTrue(violations.isEmpty());
    }

    // Test annotation composition
    public void test_composedAnnotation() {
        ComposedBean bean = new ComposedBean();
        bean.setComposedCron("invalid");

        Set<ConstraintViolation<ComposedBean>> violations = validator.validate(bean);
        assertFalse(violations.isEmpty());
    }

    // Inner test classes for validation testing