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Java example source code file (PerFrameDeflateEncoderTest.java)

This example Java source code file (PerFrameDeflateEncoderTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

binarywebsocketframe, bytebuf, continuationwebsocketframe, embeddedchannel, perframedeflateencoder, perframedeflateencodertest, random, test, util

The PerFrameDeflateEncoderTest.java Java example source code

/*
 * Copyright 2014 The Netty Project
 *
 * The Netty Project licenses this file to you 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 io.netty.handler.codec.http.websocketx.extensions.compression;

import static org.junit.Assert.*;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.embedded.EmbeddedChannel;
import io.netty.handler.codec.compression.ZlibCodecFactory;
import io.netty.handler.codec.compression.ZlibWrapper;
import io.netty.handler.codec.http.websocketx.BinaryWebSocketFrame;
import io.netty.handler.codec.http.websocketx.ContinuationWebSocketFrame;
import io.netty.handler.codec.http.websocketx.extensions.WebSocketExtension;

import java.util.Arrays;
import java.util.Random;

import org.junit.Test;

public class PerFrameDeflateEncoderTest {

    private static final Random random = new Random();

    @Test
    public void testCompressedFrame() {
        EmbeddedChannel encoderChannel = new EmbeddedChannel(new PerFrameDeflateEncoder(9, 15, false));
        EmbeddedChannel decoderChannel = new EmbeddedChannel(
                ZlibCodecFactory.newZlibDecoder(ZlibWrapper.NONE));

        // initialize
        byte[] payload = new byte[300];
        random.nextBytes(payload);
        BinaryWebSocketFrame frame = new BinaryWebSocketFrame(true,
                WebSocketExtension.RSV3, Unpooled.wrappedBuffer(payload));

        // execute
        encoderChannel.writeOutbound(frame);
        BinaryWebSocketFrame compressedFrame = encoderChannel.readOutbound();

        // test
        assertNotNull(compressedFrame);
        assertNotNull(compressedFrame.content());
        assertTrue(compressedFrame instanceof BinaryWebSocketFrame);
        assertEquals(WebSocketExtension.RSV1 | WebSocketExtension.RSV3, compressedFrame.rsv());

        decoderChannel.writeInbound(compressedFrame.content());
        decoderChannel.writeInbound(DeflateDecoder.FRAME_TAIL);
        ByteBuf uncompressedPayload = decoderChannel.readInbound();
        assertEquals(300, uncompressedPayload.readableBytes());

        byte[] finalPayload = new byte[300];
        uncompressedPayload.readBytes(finalPayload);
        assertTrue(Arrays.equals(finalPayload, payload));
        uncompressedPayload.release();
    }

    @Test
    public void testAlreadyCompressedFrame() {
        EmbeddedChannel encoderChannel = new EmbeddedChannel(new PerFrameDeflateEncoder(9, 15, false));

        // initialize
        byte[] payload = new byte[300];
        random.nextBytes(payload);

        BinaryWebSocketFrame frame = new BinaryWebSocketFrame(true,
                WebSocketExtension.RSV3 | WebSocketExtension.RSV1, Unpooled.wrappedBuffer(payload));

        // execute
        encoderChannel.writeOutbound(frame);
        BinaryWebSocketFrame newFrame = encoderChannel.readOutbound();

        // test
        assertNotNull(newFrame);
        assertNotNull(newFrame.content());
        assertTrue(newFrame instanceof BinaryWebSocketFrame);
        assertEquals(WebSocketExtension.RSV3 | WebSocketExtension.RSV1, newFrame.rsv());
        assertEquals(300, newFrame.content().readableBytes());

        byte[] finalPayload = new byte[300];
        newFrame.content().readBytes(finalPayload);
        assertTrue(Arrays.equals(finalPayload, payload));
        newFrame.release();
    }

    @Test
    public void testFramementedFrame() {
        EmbeddedChannel encoderChannel = new EmbeddedChannel(new PerFrameDeflateEncoder(9, 15, false));
        EmbeddedChannel decoderChannel = new EmbeddedChannel(
                ZlibCodecFactory.newZlibDecoder(ZlibWrapper.NONE));

        // initialize
        byte[] payload1 = new byte[100];
        random.nextBytes(payload1);
        byte[] payload2 = new byte[100];
        random.nextBytes(payload2);
        byte[] payload3 = new byte[100];
        random.nextBytes(payload3);

        BinaryWebSocketFrame frame1 = new BinaryWebSocketFrame(false,
                WebSocketExtension.RSV3, Unpooled.wrappedBuffer(payload1));
        ContinuationWebSocketFrame frame2 = new ContinuationWebSocketFrame(false,
                WebSocketExtension.RSV3, Unpooled.wrappedBuffer(payload2));
        ContinuationWebSocketFrame frame3 = new ContinuationWebSocketFrame(true,
                WebSocketExtension.RSV3, Unpooled.wrappedBuffer(payload3));

        // execute
        encoderChannel.writeOutbound(frame1);
        encoderChannel.writeOutbound(frame2);
        encoderChannel.writeOutbound(frame3);
        BinaryWebSocketFrame compressedFrame1 = encoderChannel.readOutbound();
        ContinuationWebSocketFrame compressedFrame2 = encoderChannel.readOutbound();
        ContinuationWebSocketFrame compressedFrame3 = encoderChannel.readOutbound();

        // test
        assertNotNull(compressedFrame1);
        assertNotNull(compressedFrame2);
        assertNotNull(compressedFrame3);
        assertEquals(WebSocketExtension.RSV1 | WebSocketExtension.RSV3, compressedFrame1.rsv());
        assertEquals(WebSocketExtension.RSV1 | WebSocketExtension.RSV3, compressedFrame2.rsv());
        assertEquals(WebSocketExtension.RSV1 | WebSocketExtension.RSV3, compressedFrame3.rsv());
        assertFalse(compressedFrame1.isFinalFragment());
        assertFalse(compressedFrame2.isFinalFragment());
        assertTrue(compressedFrame3.isFinalFragment());

        decoderChannel.writeInbound(compressedFrame1.content());
        decoderChannel.writeInbound(Unpooled.wrappedBuffer(DeflateDecoder.FRAME_TAIL));
        ByteBuf uncompressedPayload1 = decoderChannel.readInbound();
        byte[] finalPayload1 = new byte[100];
        uncompressedPayload1.readBytes(finalPayload1);
        assertTrue(Arrays.equals(finalPayload1, payload1));
        uncompressedPayload1.release();

        decoderChannel.writeInbound(compressedFrame2.content());
        decoderChannel.writeInbound(Unpooled.wrappedBuffer(DeflateDecoder.FRAME_TAIL));
        ByteBuf uncompressedPayload2 = decoderChannel.readInbound();
        byte[] finalPayload2 = new byte[100];
        uncompressedPayload2.readBytes(finalPayload2);
        assertTrue(Arrays.equals(finalPayload2, payload2));
        uncompressedPayload2.release();

        decoderChannel.writeInbound(compressedFrame3.content());
        decoderChannel.writeInbound(Unpooled.wrappedBuffer(DeflateDecoder.FRAME_TAIL));
        ByteBuf uncompressedPayload3 = decoderChannel.readInbound();
        byte[] finalPayload3 = new byte[100];
        uncompressedPayload3.readBytes(finalPayload3);
        assertTrue(Arrays.equals(finalPayload3, payload3));
        uncompressedPayload3.release();
    }
}

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