readMustBePendingUntilChannelIsActive() — netty Function Reference

Source Code

testsuite/src/main/java/io/netty/testsuite/transport/socket/SocketChannelNotYetConnectedTest.java lines 85–123

    @Test
    @Timeout(30)
    public void readMustBePendingUntilChannelIsActive(TestInfo info) throws Throwable {
        run(info, new Runner<Bootstrap>() {
            @Override
            public void run(Bootstrap bootstrap) throws Throwable {
                EventLoopGroup group = new MultiThreadIoEventLoopGroup(1, NioIoHandler.newFactory());
                ServerBootstrap sb = new ServerBootstrap().group(group);
                Channel serverChannel = sb.childHandler(new ChannelInboundHandlerAdapter() {
                    @Override
                    public void channelActive(ChannelHandlerContext ctx) throws Exception {
                        ctx.writeAndFlush(Unpooled.copyInt(42));
                    }
                }).channel(NioServerSocketChannel.class).bind(0).sync().channel();

                final CountDownLatch readLatch = new CountDownLatch(1);
                bootstrap.handler(new ByteToMessageDecoder() {
                    @Override
                    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
                        assertFalse(ctx.channel().isActive());
                        ctx.read();
                    }

                    @Override
                    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
                        assertThat(in.readableBytes()).isLessThanOrEqualTo(Integer.BYTES);
                        if (in.readableBytes() == Integer.BYTES) {
                            assertThat(in.readInt()).isEqualTo(42);
                            readLatch.countDown();
                        }
                    }
                });
                bootstrap.connect(serverChannel.localAddress()).sync();

                readLatch.await();
                group.shutdownGracefully().await();
            }
        });
    }