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   /*
    * Copyright 2019 The Netty Project
    *
    * The Netty Project 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 io.netty.testsuite.transport.socket;
  
  import io.netty.bootstrap.ServerBootstrap;
  import io.netty.buffer.ByteBuf;
  import io.netty.channel.Channel;
  import io.netty.channel.ChannelHandlerContext;
  import io.netty.channel.ChannelOption;
  import io.netty.channel.SimpleChannelInboundHandler;
  import io.netty.channel.socket.ChannelInputShutdownEvent;
  import io.netty.channel.socket.DuplexChannel;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.TestInfo;
  import org.junit.jupiter.api.Timeout;
  
  import java.io.IOException;
  import java.net.SocketAddress;
  import java.util.concurrent.BlockingQueue;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.LinkedBlockingQueue;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  public abstract class AbstractSocketShutdownOutputByPeerTest<Socket> extends AbstractServerSocketTest {
  
      @Test
      @Timeout(value = 30000, unit = TimeUnit.MILLISECONDS)
      public void testShutdownOutput(TestInfo testInfo) throws Throwable {
          run(testInfo, new Runner<ServerBootstrap>() {
              @Override
              public void run(ServerBootstrap serverBootstrap) throws Throwable {
                  testShutdownOutput(serverBootstrap);
              }
          });
      }
  
      public void testShutdownOutput(ServerBootstrap sb) throws Throwable {
          TestHandler h = new TestHandler();
          Socket s = newSocket();
          Channel sc = null;
          try {
              sc = sb.childHandler(h).childOption(ChannelOption.ALLOW_HALF_CLOSURE, true).bind().sync().channel();
  
              connect(s, sc.localAddress());
              write(s, 1);
  
              assertEquals(1, (int) h.queue.take());
  
              assertTrue(h.ch.isOpen());
              assertTrue(h.ch.isActive());
              assertFalse(h.ch.isInputShutdown());
              assertFalse(h.ch.isOutputShutdown());
  
              shutdownOutput(s);
  
              h.halfClosure.await();
  
              assertTrue(h.ch.isOpen());
              assertTrue(h.ch.isActive());
              assertTrue(h.ch.isInputShutdown());
              assertFalse(h.ch.isOutputShutdown());
  
              while (h.closure.getCount() != 1 && h.halfClosureCount.intValue() != 1) {
                  Thread.sleep(100);
              }
          } finally {
              if (sc != null) {
                  sc.close();
              }
              close(s);
          }
      }
  
      @Test
      @Timeout(value = 30000, unit = TimeUnit.MILLISECONDS)
      public void testShutdownOutputWithoutOption(TestInfo testInfo) throws Throwable {
          run(testInfo, new Runner<ServerBootstrap>() {
              @Override
              public void run(ServerBootstrap serverBootstrap) throws Throwable {
                  testShutdownOutputWithoutOption(serverBootstrap);
              }
         });
     }
 
     public void testShutdownOutputWithoutOption(ServerBootstrap sb) throws Throwable {
         TestHandler h = new TestHandler();
         Socket s = newSocket();
         Channel sc = null;
         try {
             sc = sb.childHandler(h).bind().sync().channel();
 
             connect(s, sc.localAddress());
             write(s, 1);
 
             assertEquals(1, (int) h.queue.take());
 
             assertTrue(h.ch.isOpen());
             assertTrue(h.ch.isActive());
             assertFalse(h.ch.isInputShutdown());
             assertFalse(h.ch.isOutputShutdown());
 
             shutdownOutput(s);
 
             h.closure.await();
 
             assertFalse(h.ch.isOpen());
             assertFalse(h.ch.isActive());
             assertTrue(h.ch.isInputShutdown());
             assertTrue(h.ch.isOutputShutdown());
 
             while (h.halfClosure.getCount() != 1 && h.halfClosureCount.intValue() != 0) {
                 Thread.sleep(100);
             }
         } finally {
             if (sc != null) {
                 sc.close();
             }
             close(s);
         }
     }
 
     protected abstract void shutdownOutput(Socket s) throws IOException;
 
     protected abstract void connect(Socket s, SocketAddress address) throws IOException;
 
     protected abstract void close(Socket s) throws IOException;
 
     protected abstract void write(Socket s, int data) throws IOException;
 
     protected abstract Socket newSocket();
 
     private static class TestHandler extends SimpleChannelInboundHandler<ByteBuf> {
         volatile DuplexChannel ch;
         final BlockingQueue<Byte> queue = new LinkedBlockingQueue<Byte>();
         final CountDownLatch halfClosure = new CountDownLatch(1);
         final CountDownLatch closure = new CountDownLatch(1);
         final AtomicInteger halfClosureCount = new AtomicInteger();
 
         @Override
         public void channelActive(ChannelHandlerContext ctx) throws Exception {
             ch = (DuplexChannel) ctx.channel();
         }
 
         @Override
         public void channelInactive(ChannelHandlerContext ctx) throws Exception {
             closure.countDown();
         }
 
         @Override
         public void channelRead0(ChannelHandlerContext ctx, ByteBuf msg) throws Exception {
             queue.offer(msg.readByte());
         }
 
         @Override
         public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
             if (evt instanceof ChannelInputShutdownEvent) {
                 halfClosureCount.incrementAndGet();
                 halfClosure.countDown();
             }
         }
     }
 }