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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.handler;
import org.junit.jupiter.api.Test;
import java.nio.ByteBuffer;
import java.util.LinkedList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.*;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertSame;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.fail;
/**
* @author Simon Thoresen Hult
*/
public class BufferedContentChannelTestCase {
@Test
void requireThatIsConnectedWorks() {
MyContent target = new MyContent();
BufferedContentChannel content = new BufferedContentChannel();
assertFalse(content.isConnected());
content.connectTo(target);
assertTrue(content.isConnected());
}
@Test
void requireThatConnectToNullThrowsException() {
BufferedContentChannel content = new BufferedContentChannel();
try {
content.connectTo(null);
fail();
} catch (NullPointerException e) {
}
}
@Test
void requireThatWriteAfterCloseThrowsException() {
BufferedContentChannel content = new BufferedContentChannel();
content.close(null);
try {
content.write(ByteBuffer.allocate(69), null);
fail();
} catch (IllegalStateException e) {
}
}
@Test
void requireThatCloseAfterCloseThrowsException() {
BufferedContentChannel content = new BufferedContentChannel();
content.close(null);
try {
content.close(null);
fail();
} catch (IllegalStateException e) {
}
}
@Test
void requireThatConnecToAfterConnecToThrowsException() {
BufferedContentChannel content = new BufferedContentChannel();
content.connectTo(new MyContent());
try {
content.connectTo(new MyContent());
fail();
} catch (IllegalStateException e) {
}
}
@Test
void requireThatWriteBeforeConnectToWritesToTarget() {
BufferedContentChannel content = new BufferedContentChannel();
ByteBuffer buf = ByteBuffer.allocate(69);
MyCompletion completion = new MyCompletion();
content.write(buf, completion);
MyContent target = new MyContent();
content.connectTo(target);
assertSame(buf, target.writeBuf);
assertSame(completion, target.writeCompletion);
}
@Test
void requireThatWriteAfterConnectToWritesToTarget() {
MyContent target = new MyContent();
BufferedContentChannel content = new BufferedContentChannel();
content.connectTo(target);
ByteBuffer buf = ByteBuffer.allocate(69);
MyCompletion completion = new MyCompletion();
content.write(buf, completion);
assertSame(buf, target.writeBuf);
assertSame(completion, target.writeCompletion);
}
@Test
void requireThatCloseBeforeConnectToClosesTarget() {
BufferedContentChannel content = new BufferedContentChannel();
MyCompletion completion = new MyCompletion();
content.close(completion);
MyContent target = new MyContent();
content.connectTo(target);
assertTrue(target.closed);
assertSame(completion, target.closeCompletion);
}
@Test
void requireThatCloseAfterConnectToClosesTarget() {
MyContent target = new MyContent();
BufferedContentChannel content = new BufferedContentChannel();
content.connectTo(target);
MyCompletion completion = new MyCompletion();
content.close(completion);
assertTrue(target.closed);
assertSame(completion, target.closeCompletion);
}
@Test
void requireThatIsConnectedIsTrueWhenConnectedBeforeClose() {
BufferedContentChannel content = new BufferedContentChannel();
assertFalse(content.isConnected());
content.connectTo(new MyContent());
assertTrue(content.isConnected());
content.close(null);
assertTrue(content.isConnected());
}
@Test
void requireThatIsConnectedIsTrueWhenClosedBeforeConnected() {
BufferedContentChannel content = new BufferedContentChannel();
assertFalse(content.isConnected());
content.close(null);
assertFalse(content.isConnected());
content.connectTo(new MyContent());
assertTrue(content.isConnected());
}
@Test
void requireThatContentIsThreadSafe() throws Exception {
ExecutorService executor = Executors.newFixedThreadPool(101);
for (int run = 0; run < 69; ++run) {
List<ByteBuffer> bufs = new LinkedList<>();
for (int buf = 0; buf < 100; ++buf) {
bufs.add(ByteBuffer.allocate(buf));
}
BufferedContentChannel content = new BufferedContentChannel();
List<Callable<Boolean>> tasks = new LinkedList<>();
for (ByteBuffer buf : bufs) {
tasks.add(new WriteTask(content, buf));
}
MyConcurrentContent target = new MyConcurrentContent();
tasks.add(new ConnectTask(content, target));
List<Future<Boolean>> results = executor.invokeAll(tasks);
for (Future<Boolean> result : results) {
assertTrue(result.get());
}
assertEquals(bufs.size(), target.bufs.size());
for (ByteBuffer buf : target.bufs) {
assertTrue(bufs.remove(buf));
}
assertTrue(bufs.isEmpty());
}
}
private static class WriteTask implements Callable<Boolean> {
final Random rnd = new Random();
final BufferedContentChannel content;
final ByteBuffer buf;
WriteTask(BufferedContentChannel content, ByteBuffer buf) {
this.content = content;
this.buf = buf;
}
@Override
public Boolean call() throws Exception {
if (rnd.nextBoolean()) {
Thread.sleep(rnd.nextInt(5));
}
content.write(buf, null);
return Boolean.TRUE;
}
}
private static class ConnectTask implements Callable<Boolean> {
final BufferedContentChannel content;
final ContentChannel target;
ConnectTask(BufferedContentChannel content, ContentChannel target) {
this.content = content;
this.target = target;
}
@Override
public Boolean call() throws Exception {
content.connectTo(target);
return Boolean.TRUE;
}
}
private static class MyContent implements ContentChannel {
ByteBuffer writeBuf = null;
CompletionHandler writeCompletion;
CompletionHandler closeCompletion;
boolean closed = false;
@Override
public void write(ByteBuffer buf, CompletionHandler handler) {
writeBuf = buf;
writeCompletion = handler;
}
@Override
public void close(CompletionHandler handler) {
closeCompletion = handler;
closed = true;
}
}
private static class MyConcurrentContent implements ContentChannel {
ConcurrentLinkedQueue<ByteBuffer> bufs = new ConcurrentLinkedQueue<>();
@Override
public void write(ByteBuffer buf, CompletionHandler handler) {
bufs.add(buf);
}
@Override
public void close(CompletionHandler handler) {
}
}
private static class MyCompletion implements CompletionHandler {
@Override
public void completed() {
}
@Override
public void failed(Throwable throwable) {
}
}
}
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