@Override
    protected Mono<Void> doFilter(final ServerWebExchange exchange) {
        ServerHttpResponse response = exchange.getResponse();
        response.setStatusCode(HttpStatus.OK);
        return Mono.empty();
    }
@Test
    public void testDoFilter() {
        ServerWebExchange webExchange =
                MockServerWebExchange.from(MockServerHttpRequest
                        .post("http://localhost:8080/"));
        Mono<Void> filter = excludeFilter.doFilter(webExchange);
        StepVerifier.create(filter).verifyComplete();
    }