com.spotify.netty4.handler.codec.zmtp.ProtocolViolationTests.java Source code

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Here is the source code for com.spotify.netty4.handler.codec.zmtp.ProtocolViolationTests.java

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/*
 * Copyright (c) 2012-2013 Spotify AB
 *
 * 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.spotify.netty4.handler.codec.zmtp;

import com.google.common.util.concurrent.SettableFuture;

import org.junit.After;
import org.junit.Before;
import org.junit.experimental.theories.Theories;
import org.junit.experimental.theories.Theory;
import org.junit.experimental.theories.suppliers.TestedOn;
import org.junit.runner.RunWith;

import java.net.InetSocketAddress;

import io.netty.bootstrap.Bootstrap;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.util.ReferenceCountUtil;

import static com.spotify.netty4.handler.codec.zmtp.ZMTPProtocols.ZMTP20;
import static com.spotify.netty4.handler.codec.zmtp.ZMTPSocketType.ROUTER;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.assertFalse;

@RunWith(Theories.class)
public class ProtocolViolationTests {

    private Channel serverChannel;
    private InetSocketAddress serverAddress;

    private final String identity = "identity";
    private NioEventLoopGroup bossGroup;
    private NioEventLoopGroup group;

    @ChannelHandler.Sharable
    private static class MockHandler extends ChannelInboundHandlerAdapter {

        private SettableFuture<Void> active = SettableFuture.create();
        private SettableFuture<Throwable> exception = SettableFuture.create();
        private SettableFuture<Void> inactive = SettableFuture.create();

        private volatile boolean handshaked;
        private volatile boolean read;

        @Override
        public void channelActive(final ChannelHandlerContext ctx) throws Exception {
            active.set(null);
        }

        @Override
        public void channelInactive(final ChannelHandlerContext ctx) throws Exception {
            inactive.set(null);
        }

        @Override
        public void userEventTriggered(final ChannelHandlerContext ctx, final Object evt) throws Exception {
            if (evt instanceof ZMTPHandshakeSuccess) {
                handshaked = true;
            }
        }

        @Override
        public void channelRead(final ChannelHandlerContext ctx, final Object msg) throws Exception {
            ReferenceCountUtil.release(msg);
            read = true;
        }

        @Override
        public void exceptionCaught(final ChannelHandlerContext ctx, final Throwable cause) throws Exception {
            exception.set(cause);
            ctx.close();
        }
    }

    private final MockHandler mockHandler = new MockHandler();

    @Before
    public void setup() {
        final ServerBootstrap serverBootstrap = new ServerBootstrap();
        serverBootstrap.channel(NioServerSocketChannel.class);
        bossGroup = new NioEventLoopGroup(1);
        group = new NioEventLoopGroup();
        serverBootstrap.group(bossGroup, group);
        serverBootstrap.childHandler(new ChannelInitializer<NioSocketChannel>() {
            @Override
            protected void initChannel(final NioSocketChannel ch) throws Exception {
                ch.pipeline().addLast(
                        ZMTPCodec.builder().protocol(ZMTP20).socketType(ROUTER).localIdentity(identity).build(),
                        mockHandler);
            }
        });

        serverChannel = serverBootstrap.bind(new InetSocketAddress("localhost", 0)).awaitUninterruptibly()
                .channel();
        serverAddress = (InetSocketAddress) serverChannel.localAddress();
    }

    @After
    public void teardown() {
        if (serverChannel != null) {
            serverChannel.close();
        }
        if (bossGroup != null) {
            bossGroup.shutdownGracefully();
        }
        if (group != null) {
            group.shutdownGracefully();
        }
    }

    @Theory
    public void protocolErrorsCauseException(@TestedOn(ints = { 16, 17, 27, 32, 48, 53 }) final int payloadSize)
            throws Exception {
        final Bootstrap b = new Bootstrap();
        b.group(new NioEventLoopGroup());
        b.channel(NioSocketChannel.class);
        b.handler(new ChannelInitializer<NioSocketChannel>() {
            @Override
            protected void initChannel(final NioSocketChannel ch) throws Exception {
                ch.pipeline().addLast(new MockHandler());
            }
        });

        final Channel channel = b.connect(serverAddress).awaitUninterruptibly().channel();

        final ByteBuf payload = Unpooled.buffer(payloadSize);
        for (int i = 0; i < payloadSize; i++) {
            payload.writeByte(0);
        }
        channel.writeAndFlush(payload);

        mockHandler.active.get(5, SECONDS);
        mockHandler.exception.get(5, SECONDS);
        mockHandler.inactive.get(5, SECONDS);
        assertFalse(mockHandler.handshaked);
        assertFalse(mockHandler.read);
    }
}