/*
* Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.nio;
import com.hazelcast.test.HazelcastSerialClassRunner;
import com.hazelcast.test.HazelcastTestSupport;
import com.hazelcast.test.annotation.QuickTest;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import java.nio.ByteBuffer;
import java.util.LinkedList;
import java.util.List;
import java.util.Random;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
/**
* Unit test that verifies that a packet can safely be stored in a byte-buffer and converted back
* again into a packet.
*/
@RunWith(HazelcastSerialClassRunner.class)
@Category(QuickTest.class)
public class PacketTransportTest extends HazelcastTestSupport {
/**
* Checks if the packet can deal with a buffer that is very small, but the data is very large, which
* needs repeated calls to {@link Packet#writeTo(ByteBuffer)} and {@link Packet#readFrom(ByteBuffer)}.
*/
@Test
public void largeValue() {
Packet originalPacket = new Packet(generateRandomString(100000).getBytes());
Packet clonedPacket = new Packet();
ByteBuffer bb = ByteBuffer.allocate(20);
boolean writeCompleted;
boolean readCompleted;
do {
writeCompleted = originalPacket.writeTo(bb);
bb.flip();
readCompleted = clonedPacket.readFrom(bb);
bb.clear();
} while (!writeCompleted);
assertTrue(readCompleted);
assertPacketEquals(originalPacket, clonedPacket);
}
@Test
public void lotsOfPackets() {
List<Packet> originalPackets = new LinkedList<Packet>();
Random random = new Random();
for (int k = 0; k < 1000; k++) {
byte[] bytes = generateRandomString(random.nextInt(1000) + 8).getBytes();
Packet originalPacket = new Packet(bytes);
originalPackets.add(originalPacket);
}
ByteBuffer bb = ByteBuffer.allocate(20);
for (Packet originalPacket : originalPackets) {
Packet clonedPacket = new Packet();
boolean writeCompleted;
boolean readCompleted;
do {
writeCompleted = originalPacket.writeTo(bb);
bb.flip();
readCompleted = clonedPacket.readFrom(bb);
bb.clear();
} while (!writeCompleted);
assertTrue(readCompleted);
assertPacketEquals(originalPacket, clonedPacket);
}
}
/**
* Verifies that writing a Packet to a ByteBuffer and then reading it from the ByteBuffer, gives the same Packet (content).
*/
@Test
public void cloningOfPacket() {
Packet originalPacket = new Packet("foobarbaz".getBytes());
ByteBuffer bb = ByteBuffer.allocate(100);
boolean written = originalPacket.writeTo(bb);
assertTrue(written);
bb.flip();
Packet clonedPacket = new Packet();
boolean read = clonedPacket.readFrom(bb);
assertTrue(read);
assertPacketEquals(originalPacket, clonedPacket);
}
private static void assertPacketEquals(Packet originalPacket, Packet clonedPacket) {
assertEquals(originalPacket.getFlags(), clonedPacket.getFlags());
assertArrayEquals(originalPacket.toByteArray(), clonedPacket.toByteArray());
}
}