assertEquals("Access-Control-Max-Age", CorsHandler.ACCESS_CONTROL_MAX_AGE);
    }

    // Test that constants are protected static final
    @Test
    public void test_constantsModifiers() throws Exception {
        Field[] fields = CorsHandler.class.getDeclaredFields();
        for (Field field : fields) {
            if (field.getName().startsWith("ACCESS_CONTROL_")) {