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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.io;
import static org.junit.Assert.*;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.SocketChannel;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import com.yahoo.collections.Tuple2;
import com.yahoo.concurrent.Receiver;
import com.yahoo.concurrent.Receiver.MessageState;
/**
* Test a NIO based Reactor pattern implementation, com.yahoo.io.Listener.
*
* @author <a href="mailto:steinar@yahoo-inc.com">Steinar Knutsen</a>
*/
public class ListenerTestCase {
@Before
public void setUp() throws Exception {
}
@After
public void tearDown() throws Exception {
}
Receiver<Byte> r = new Receiver<>();
private final class MockConnection implements Connection {
private SocketChannel channel;
MockConnection(SocketChannel channel, Listener listener) {
this.channel = channel;
}
@Override
public void write() throws IOException {
}
@Override
public void read() throws IOException {
ByteBuffer b = ByteBuffer.allocate(1);
channel.read(b);
b.flip();
r.put(b.get());
}
@Override
public void close() throws IOException {
channel.close();
}
@Override
public void connect() throws IOException {
}
@Override
public int selectOps() {
return SelectionKey.OP_READ;
}
@Override
public SocketChannel socketChannel() {
return channel;
}
}
private final class GetConnection implements ConnectionFactory {
@Override
public Connection newConnection(SocketChannel channel, Listener listener) {
return new MockConnection(channel, listener);
}
}
@Test
public final void testRun() throws IOException, InterruptedException {
Listener l = new Listener("ListenerTestCase");
l.listen(new GetConnection(), 0);
l.start();
int port = ((InetSocketAddress) l.acceptors.get(0).socket.getLocalAddress()).getPort();
Socket s = new Socket("127.0.0.1", port);
final byte expected = 42;
s.getOutputStream().write(expected);
s.getOutputStream().flush();
s.close();
Tuple2<MessageState, Byte> received = r.get(60 * 1000);
l.acceptors.get(0).interrupt();
l.acceptors.get(0).socket.close();
l.acceptors.get(0).join();
l.interrupt();
l.join();
assertTrue("Test timed out.", received.first == MessageState.VALID);
assertEquals(expected, received.second.byteValue());
}
}
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