org.spout.api.protocol.ByteBufferChannelProcessorTest.java Source code

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Here is the source code for org.spout.api.protocol.ByteBufferChannelProcessorTest.java

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/*
 * This file is part of Spout.
 *
 * Copyright (c) 2011 Spout LLC <http://www.spout.org/>
 * Spout is licensed under the Spout License Version 1.
 *
 * Spout is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option)
 * any later version.
 *
 * In addition, 180 days after any changes are published, you can use the
 * software, incorporating those changes, under the terms of the MIT license,
 * as described in the Spout License Version 1.
 *
 * Spout is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
 * more details.
 *
 * You should have received a copy of the GNU Lesser General Public License,
 * the MIT license and the Spout License Version 1 along with this program.
 * If not, see <http://www.gnu.org/licenses/> for the GNU Lesser General Public
 * License and see <http://spout.in/licensev1> for the full license, including
 * the MIT license.
 */
package org.spout.api.protocol;

import java.util.Random;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import org.junit.Test;

import org.spout.api.protocol.fake.ChannelHandlerContextFaker;

import static org.junit.Assert.assertTrue;

public class ByteBufferChannelProcessorTest {
    private final int LENGTH = 65536;
    Thread mainThread;

    @Test
    public void randomPassthrough() {

        mainThread = Thread.currentThread();

        ByteBuf buffer = Unpooled.buffer(2048);

        ChannelHandlerContext ctx = ChannelHandlerContextFaker.setup();

        ByteBufferChannelProcessor processor = new ByteBufferChannelProcessor(256);

        byte[] input = new byte[LENGTH];
        byte[] output = new byte[LENGTH];

        Random r = new Random();

        for (int i = 0; i < input.length; i++) {
            input[i] = (byte) (r.nextInt());
        }

        int writePointer = 0;
        int readPointer = 0;

        int pass = 0;

        while (writePointer < LENGTH && (pass++) < 512) {

            int toWrite = r.nextInt(512);

            if (r.nextInt(10) == 0) {
                // simulate "large" packets
                toWrite *= 10;
            }

            if (toWrite > buffer.writableBytes()) {
                toWrite = buffer.writableBytes();
            }
            if (toWrite > LENGTH - writePointer) {
                toWrite = LENGTH - writePointer;
            }

            System.out.println("Writing block of size " + toWrite);

            buffer.writeBytes(input, writePointer, toWrite);
            writePointer += toWrite;

            ByteBuf outputBuffer = processor.write(ctx, buffer);

            buffer.discardReadBytes();

            while (outputBuffer.isReadable()) {
                int toRead = r.nextInt(768);
                if (toRead > outputBuffer.readableBytes()) {
                    toRead = outputBuffer.readableBytes();
                }
                System.out.println("ToRead: " + toRead + " of " + outputBuffer.readableBytes());
                outputBuffer.readBytes(output, readPointer, toRead);
                readPointer += toRead;
                outputBuffer.discardReadBytes();
            }

            outputBuffer.release();
        }

        buffer.release();

        for (int i = 0; i < input.length; i++) {
            assertTrue("Mismatch at position " + i, input[i] == output[i]);
        }
    }
}