lang/java/ipc-netty/src/test/java/org/apache/avro/ipc/netty/TestNettyTransceiverWhenFailsToConnect.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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
 *
 *     https://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.apache.avro.ipc.netty;

import org.apache.avro.ipc.Transceiver;

import org.junit.Assert;
import org.junit.Test;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.ServerSocket;

import io.netty.channel.socket.SocketChannel;

/**
 * This is a very specific test that verifies that if the NettyTransceiver fails
 * to connect it cleans up the netty channel that it has created.
 */
public class TestNettyTransceiverWhenFailsToConnect {
  SocketChannel channel = null;

  @Test(expected = IOException.class)
  public void testNettyTransceiverReleasesNettyChannelOnFailingToConnect() throws Exception {
    try (ServerSocket serverSocket = new ServerSocket(0)) {
      try (Transceiver t = new NettyTransceiver(new InetSocketAddress(serverSocket.getLocalPort()), 1, c -> {
        channel = c;
      })) {
        Assert.fail("should have thrown an exception");
      }
    } finally {
      Assert.assertTrue("Channel not shut down", channel == null || channel.isShutdown());
    }
  }
}