@Bean("dispatcherHandler")
    public DispatcherHandler dispatcherHandler() {
        return new DispatcherHandler();
    }
@Test
    public void testDispatcherHandler() {
        applicationContextRunner.run(context -> {
                DispatcherHandler handler = context.getBean("dispatcherHandler", DispatcherHandler.class);
                assertNotNull(handler);
            }
        );
    }