@Test
public void testNetSocketStreamCallbackIsAsync() {
this.server = vertx.createNetServer(new NetServerOptions());
AtomicInteger done = new AtomicInteger();
NetSocketStream stream = server.connectStream();
stream.handler(req -> {});
ThreadLocal<Object> stack = new ThreadLocal<>();
stack.set(true);
stream.endHandler(v -> {
assertTrue(vertx.context().isEventLoopContext());
assertNull(stack.get());