Java example source code file (RedisDecoderTest.java)

This example Java source code file (RedisDecoderTest.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.

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Java - Java tags/keywords

arrayredismessage, bar, bytebuf, embeddedchannel, exception, fullbulkstringredismessage, list, ond\r\n, redisarrayaggregator, redisbulkstringaggregator, redisdecodertest, simplestringredismessage, test, util

The RedisDecoderTest.java Java example source code

/*
 * Copyright 2016 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.redis;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.embedded.EmbeddedChannel;
import io.netty.util.IllegalReferenceCountException;
import io.netty.util.ReferenceCountUtil;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.util.List;

import static io.netty.handler.codec.redis.RedisCodecTestUtil.*;
import static org.hamcrest.CoreMatchers.*;
import static org.junit.Assert.*;

/**
 * Verifies the correct functionality of the {@link RedisDecoder} and {@link RedisArrayAggregator}.
 */
public class RedisDecoderTest {

    private EmbeddedChannel channel;

    @Before
    public void setup() throws Exception {
        channel = new EmbeddedChannel(
                new RedisDecoder(),
                new RedisBulkStringAggregator(),
                new RedisArrayAggregator());
    }

    @After
    public void teardown() throws Exception {
        assertFalse(channel.finish());
    }

    @Test
    public void shouldDecodeSimpleString() {
        assertFalse(channel.writeInbound(byteBufOf("+")));
        assertFalse(channel.writeInbound(byteBufOf("O")));
        assertFalse(channel.writeInbound(byteBufOf("K")));
        assertTrue(channel.writeInbound(byteBufOf("\r\n")));

        SimpleStringRedisMessage msg = channel.readInbound();

        assertThat(msg.content(), is("OK"));

        ReferenceCountUtil.release(msg);
    }

    @Test
    public void shouldDecodeTwoSimpleStrings() {
        assertFalse(channel.writeInbound(byteBufOf("+")));
        assertFalse(channel.writeInbound(byteBufOf("O")));
        assertFalse(channel.writeInbound(byteBufOf("K")));
        assertTrue(channel.writeInbound(byteBufOf("\r\n+SEC")));
        assertTrue(channel.writeInbound(byteBufOf("OND\r\n")));

        SimpleStringRedisMessage msg1 = channel.readInbound();
        assertThat(msg1.content(), is("OK"));
        ReferenceCountUtil.release(msg1);

        SimpleStringRedisMessage msg2 = channel.readInbound();
        assertThat(msg2.content(), is("SECOND"));
        ReferenceCountUtil.release(msg2);
    }

    @Test
    public void shouldDecodeError() {
        String content = "ERROR sample message";
        assertFalse(channel.writeInbound(byteBufOf("-")));
        assertFalse(channel.writeInbound(byteBufOf(content)));
        assertFalse(channel.writeInbound(byteBufOf("\r")));
        assertTrue(channel.writeInbound(byteBufOf("\n")));

        ErrorRedisMessage msg = channel.readInbound();

        assertThat(msg.content(), is(content));

        ReferenceCountUtil.release(msg);
    }

    @Test
    public void shouldDecodeInteger() {
        long value = 1234L;
        byte[] content = bytesOf(value);
        assertFalse(channel.writeInbound(byteBufOf(":")));
        assertFalse(channel.writeInbound(byteBufOf(content)));
        assertTrue(channel.writeInbound(byteBufOf("\r\n")));

        IntegerRedisMessage msg = channel.readInbound();

        assertThat(msg.value(), is(value));

        ReferenceCountUtil.release(msg);
    }

    @Test
    public void shouldDecodeBulkString() {
        String buf1 = "bulk\nst";
        String buf2 = "ring\ntest\n1234";
        byte[] content = bytesOf(buf1 + buf2);
        assertFalse(channel.writeInbound(byteBufOf("$")));
        assertFalse(channel.writeInbound(byteBufOf(Integer.toString(content.length))));
        assertFalse(channel.writeInbound(byteBufOf("\r\n")));
        assertFalse(channel.writeInbound(byteBufOf(buf1)));
        assertFalse(channel.writeInbound(byteBufOf(buf2)));
        assertTrue(channel.writeInbound(byteBufOf("\r\n")));

        FullBulkStringRedisMessage msg = channel.readInbound();

        assertThat(bytesOf(msg.content()), is(content));

        ReferenceCountUtil.release(msg);
    }

    @Test
    public void shouldDecodeEmptyBulkString() {
        byte[] content = bytesOf("");
        assertFalse(channel.writeInbound(byteBufOf("$")));
        assertFalse(channel.writeInbound(byteBufOf(Integer.toString(content.length))));
        assertFalse(channel.writeInbound(byteBufOf("\r\n")));
        assertFalse(channel.writeInbound(byteBufOf(content)));
        assertTrue(channel.writeInbound(byteBufOf("\r\n")));

        FullBulkStringRedisMessage msg = channel.readInbound();

        assertThat(bytesOf(msg.content()), is(content));

        ReferenceCountUtil.release(msg);
    }

    @Test
    public void shouldDecodeNullBulkString() {
        assertFalse(channel.writeInbound(byteBufOf("$")));
        assertFalse(channel.writeInbound(byteBufOf(Integer.toString(-1))));
        assertTrue(channel.writeInbound(byteBufOf("\r\n")));

        assertTrue(channel.writeInbound(byteBufOf("$")));
        assertTrue(channel.writeInbound(byteBufOf(Integer.toString(-1))));
        assertTrue(channel.writeInbound(byteBufOf("\r\n")));

        FullBulkStringRedisMessage msg1 = channel.readInbound();
        assertThat(msg1.isNull(), is(true));
        ReferenceCountUtil.release(msg1);

        FullBulkStringRedisMessage msg2 = channel.readInbound();
        assertThat(msg2.isNull(), is(true));
        ReferenceCountUtil.release(msg2);

        FullBulkStringRedisMessage msg3 = channel.readInbound();
        assertThat(msg3, is(nullValue()));
    }

    @Test
    public void shouldDecodeSimpleArray() throws Exception {
        assertFalse(channel.writeInbound(byteBufOf("*3\r\n")));
        assertFalse(channel.writeInbound(byteBufOf(":1234\r\n")));
        assertFalse(channel.writeInbound(byteBufOf("+sim")));
        assertFalse(channel.writeInbound(byteBufOf("ple\r\n-err")));
        assertTrue(channel.writeInbound(byteBufOf("or\r\n")));

        ArrayRedisMessage msg = channel.readInbound();
        List<RedisMessage> children = msg.children();

        assertThat(msg.children().size(), is(equalTo(3)));

        assertThat(children.get(0), instanceOf(IntegerRedisMessage.class));
        assertThat(((IntegerRedisMessage) children.get(0)).value(), is(1234L));
        assertThat(children.get(1), instanceOf(SimpleStringRedisMessage.class));
        assertThat(((SimpleStringRedisMessage) children.get(1)).content(), is("simple"));
        assertThat(children.get(2), instanceOf(ErrorRedisMessage.class));
        assertThat(((ErrorRedisMessage) children.get(2)).content(), is("error"));

        ReferenceCountUtil.release(msg);
    }

    @Test
    public void shouldDecodeNestedArray() throws Exception {
        ByteBuf buf = Unpooled.buffer();
        buf.writeBytes(byteBufOf("*2\r\n"));
        buf.writeBytes(byteBufOf("*3\r\n:1\r\n:2\r\n:3\r\n"));
        buf.writeBytes(byteBufOf("*2\r\n+Foo\r\n-Bar\r\n"));
        assertTrue(channel.writeInbound(buf));

        ArrayRedisMessage msg = channel.readInbound();
        List<RedisMessage> children = msg.children();

        assertThat(msg.children().size(), is(2));

        ArrayRedisMessage intArray = (ArrayRedisMessage) children.get(0);
        ArrayRedisMessage strArray = (ArrayRedisMessage) children.get(1);

        assertThat(intArray.children().size(), is(3));
        assertThat(((IntegerRedisMessage) intArray.children().get(0)).value(), is(1L));
        assertThat(((IntegerRedisMessage) intArray.children().get(1)).value(), is(2L));
        assertThat(((IntegerRedisMessage) intArray.children().get(2)).value(), is(3L));

        assertThat(strArray.children().size(), is(2));
        assertThat(((SimpleStringRedisMessage) strArray.children().get(0)).content(), is("Foo"));
        assertThat(((ErrorRedisMessage) strArray.children().get(1)).content(), is("Bar"));

        ReferenceCountUtil.release(msg);
    }

    @Test(expected = IllegalReferenceCountException.class)
    public void shouldErrorOnDoubleReleaseArrayReferenceCounted() throws Exception {
        ByteBuf buf = Unpooled.buffer();
        buf.writeBytes(byteBufOf("*2\r\n"));
        buf.writeBytes(byteBufOf("*3\r\n:1\r\n:2\r\n:3\r\n"));
        buf.writeBytes(byteBufOf("*2\r\n+Foo\r\n-Bar\r\n"));
        assertTrue(channel.writeInbound(buf));

        ArrayRedisMessage msg = channel.readInbound();

        ReferenceCountUtil.release(msg);
        ReferenceCountUtil.release(msg);
    }

    @Test(expected = IllegalReferenceCountException.class)
    public void shouldErrorOnReleaseArrayChildReferenceCounted() throws Exception {
        ByteBuf buf = Unpooled.buffer();
        buf.writeBytes(byteBufOf("*2\r\n"));
        buf.writeBytes(byteBufOf("*3\r\n:1\r\n:2\r\n:3\r\n"));
        buf.writeBytes(byteBufOf("$3\r\nFoo\r\n"));
        assertTrue(channel.writeInbound(buf));

        ArrayRedisMessage msg = channel.readInbound();

        List<RedisMessage> children = msg.children();
        ReferenceCountUtil.release(msg);
        ReferenceCountUtil.release(children.get(1));
    }

    @Test(expected = IllegalReferenceCountException.class)
    public void shouldErrorOnReleasecontentOfArrayChildReferenceCounted() throws Exception {
        ByteBuf buf = Unpooled.buffer();
        buf.writeBytes(byteBufOf("*2\r\n"));
        buf.writeBytes(byteBufOf("$3\r\nFoo\r\n$3\r\nBar\r\n"));
        assertTrue(channel.writeInbound(buf));

        ArrayRedisMessage msg = channel.readInbound();

        List<RedisMessage> children = msg.children();
        ByteBuf childBuf = ((FullBulkStringRedisMessage) children.get(0)).content();
        ReferenceCountUtil.release(msg);
        ReferenceCountUtil.release(childBuf);
    }
}