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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.fs4.test;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import com.yahoo.fs4.*;
import com.yahoo.search.Query;
import org.junit.Ignore;
import org.junit.Test;
import static junit.framework.Assert.assertEquals;
import static junit.framework.TestCase.*;
import static org.junit.Assume.assumeTrue;
/**
* Tests the Packet class. Specifically made this unit test suite
* for checking that queries that are too large for the buffer
* are handled gracefully.
*
* @author <a href="mailto:borud@yahoo-inc.com">Bjorn Borud</a>
*/
public class PacketTestCase {
/**
* Make sure we don't get false negatives for reasonably sized
* buffers
*/
@Test
public void testSmallQueryOK () {
Query query = new Query("/?query=foo");
assertNotNull(query);
QueryPacket queryPacket = QueryPacket.create(query);
assertNotNull(queryPacket);
ByteBuffer buffer = ByteBuffer.allocate(1024);
int position = buffer.position();
try {
queryPacket.encode(buffer, 0);
}
catch (BufferTooSmallException e) {
fail();
}
// make sure state of buffer HAS changed and is according
// to contract
assertTrue(position != buffer.position());
assertTrue(buffer.position() == buffer.limit());
}
/**
* Make a query that is too large and then try to encode it
* into a small ByteBuffer
*/
@Test
public void testLargeQueryFail () {
StringBuilder queryBuffer = new StringBuilder(4008);
queryBuffer.append("/?query=");
for (int i=0; i < 1000; i++) {
queryBuffer.append("the%20");
}
Query query = new Query(queryBuffer.toString());
assertNotNull(query);
QueryPacket queryPacket = QueryPacket.create(query);
assertNotNull(queryPacket);
ByteBuffer buffer = ByteBuffer.allocate(100);
int position = buffer.position();
int limit = buffer.limit();
try {
queryPacket.encode(buffer, 0);
fail();
}
catch (BufferTooSmallException e) {
// success if exception is thrown
}
// make sure state of buffer is unchanged
assertEquals(position, buffer.position());
assertEquals(limit, buffer.limit());
}
@Test
public void requireThatPacketsCanTurnOnCompression() throws BufferTooSmallException {
QueryPacket queryPacket = QueryPacket.create(new Query("/?query=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"));
ByteBuffer buffer = ByteBuffer.allocate(1024);
int channel = 32;
queryPacket.encode(buffer, channel);
buffer.flip();
assertEquals(86, buffer.getInt()); // size
assertEquals(0xda, buffer.getInt()); // code
assertEquals(channel, buffer.getInt());
queryPacket.setCompressionLimit(88);
buffer.clear();
queryPacket.encode(buffer, channel);
buffer.flip();
assertEquals(86, buffer.getInt()); // size
assertEquals(0xda, buffer.getInt()); // code
queryPacket.setCompressionLimit(84);
buffer.clear();
queryPacket.encode(buffer, channel);
buffer.flip();
assertEquals(57, buffer.getInt()); // size
assertEquals(0x060000da, buffer.getInt()); // code
assertEquals(channel, buffer.getInt());
}
@Test
public void requireThatUncompressablePacketsArentCompressed() throws BufferTooSmallException {
QueryPacket queryPacket = QueryPacket.create(new Query("/?query=aaaaaaaaaaaaaaa"));
ByteBuffer buffer = ByteBuffer.allocate(1024);
int channel = 32;
queryPacket.setCompressionLimit(10);
buffer.clear();
queryPacket.encode(buffer, channel);
buffer.flip();
assertEquals(56, buffer.getInt()); // size
assertEquals(0xda, buffer.getInt()); // code
assertEquals(channel, buffer.getInt());
}
class MyPacket extends Packet {
private String bodyString = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
private int myCode = 1234;
@Override
public int getCode() {
return myCode;
}
@Override
protected void encodeBody(ByteBuffer buffer) {
buffer.put(bodyString.getBytes(StandardCharsets.UTF_8));
}
@Override
public void codeDecodedHook(int code) {
assertEquals(myCode, code);
}
@Override
public void decodeBody(ByteBuffer buffer) {
byte[] bytes = new byte[bodyString.length()];
buffer.get(bytes);
assertEquals(bodyString, new String(bytes));
}
}
@Test
public void requireThatCompressedPacketsCanBeDecompressed() throws BufferTooSmallException {
MyPacket packet = new MyPacket();
packet.setCompressionLimit(10);
ByteBuffer buffer = ByteBuffer.allocate(1024);
int channel = 32;
packet.encode(buffer, channel);
buffer.flip();
new MyPacket().decode(buffer);
}
@Test
public void requireThatCompressedByteBufferMayContainExtraData() throws BufferTooSmallException {
MyPacket packet = new MyPacket();
packet.setCompressionLimit(10);
ByteBuffer buffer = ByteBuffer.allocate(1024);
buffer.putLong(0xdeadbeefL);
int channel = 32;
packet.encode(buffer, channel);
buffer.limit(buffer.limit() + 8);
buffer.putLong(0xdeadbeefL);
buffer.flip();
assertEquals(0xdeadbeefL, buffer.getLong()); // read initial content.
new MyPacket().decode(buffer);
assertEquals(0xdeadbeefL, buffer.getLong()); // read final content.
}
class MyBasicPacket extends BasicPacket {
private String bodyString = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
private int myCode = 1234;
@Override
public int getCode() {
return myCode;
}
@Override
protected void encodeBody(ByteBuffer buffer) {
buffer.put(bodyString.getBytes(StandardCharsets.UTF_8));
}
@Override
public void codeDecodedHook(int code) {
assertEquals(myCode, code);
}
@Override
public void decodeBody(ByteBuffer buffer) {
byte[] bytes = new byte[bodyString.length()];
buffer.get(bytes);
assertEquals(bodyString, new String(bytes));
}
}
@Test
public void requireThatCompressedBasicPacketsCanBeDecompressed() throws BufferTooSmallException {
MyBasicPacket packet = new MyBasicPacket();
packet.setCompressionLimit(10);
ByteBuffer buffer = ByteBuffer.allocate(1024);
packet.encode(buffer);
buffer.flip();
new MyBasicPacket().decode(buffer);
}
}
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