@DisplayName("starts server")
@Test
void start() {

  WebsocketRouteTransport serverTransport =
      new WebsocketRouteTransport(HttpServer.create(), routes -> {}, "/test-path");
  serverTransport
      .start(duplexConnection -> Mono.empty())
      .as(StepVerifier::create)
      .expectNextCount(1)
      .verifyComplete();
}