code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The SFC licenses this file
  // to you under the Apache License, Version 2.0 (the
  // "License"); you may not use this file except in compliance
  // with the License.  You may obtain a copy of the License at
  //
  //   http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing,
  // software distributed under the License is distributed on an
  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, either express or implied.  See the License for the
  // specific language governing permissions and limitations
  // under the License.
  
  package org.openqa.selenium.events;
  
  import static java.util.concurrent.TimeUnit.SECONDS;
  import static org.assertj.core.api.Assertions.assertThat;
  
  import java.util.concurrent.CompletableFuture;
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.TimeoutException;
  import org.assertj.core.api.Assertions;
  import org.junit.jupiter.api.Test;
  import org.openqa.selenium.events.zeromq.ZeroMqEventBus;
  import org.openqa.selenium.grid.security.Secret;
  import org.zeromq.ZContext;
  
  class ZeroMqEventBusTest {
  
    @Test
    void shouldEnsureMessagesRequireSecret()
        throws InterruptedException, ExecutionException, TimeoutException {
      String publish = "inproc://zmqebt-publish";
      String subscribe = "inproc://zmqebt-subscribe";
  
      ZContext context = new ZContext();
      try (EventBus good =
              ZeroMqEventBus.create(context, publish, subscribe, true, new Secret("cheese"));
          EventBus alsoGood =
              ZeroMqEventBus.create(context, publish, subscribe, false, new Secret("cheese"));
          EventBus bad =
              ZeroMqEventBus.create(context, publish, subscribe, false, new Secret("peas"))) {
  
        RuntimeException errorException = new RuntimeException("oh noes!");
        EventName eventName = new EventName("evt");
        CompletableFuture<String> future = new CompletableFuture<>();
        good.addListener(new EventListener<>(eventName, String.class, future::complete));
        good.addListener(
            ZeroMqEventBus.onRejectedEvent(evt -> future.completeExceptionally(errorException)));
  
        alsoGood.fire(new Event(eventName, "tasty"));
  
        String value = future.get(5, SECONDS);
        assertThat(value).isEqualTo("tasty");
  
        CompletableFuture<String> badFuture = new CompletableFuture<>();
        good.addListener(new EventListener<>(eventName, String.class, badFuture::complete));
        good.addListener(
            ZeroMqEventBus.onRejectedEvent(evt -> badFuture.completeExceptionally(errorException)));
        bad.fire(new Event(eventName, "not tasty"));
  
        Assertions.assertThatThrownBy(() -> badFuture.get(5, SECONDS))
            .getCause()
            .isSameAs(errorException);
      }
    }
  }
  