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Java example source code file (SnappyIntegrationTest.java)

This example Java source code file (SnappyIntegrationTest.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

abstractintegrationtest, embeddedchannel, override, random_runs, snappyframedecoder, snappyframeencoder, snappyintegrationtest, test, throwable, util

The SnappyIntegrationTest.java Java example source code

/*
 * Copyright 2013 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.compression;

import io.netty.channel.embedded.EmbeddedChannel;
import org.junit.Test;

import java.util.Random;

public class SnappyIntegrationTest extends AbstractIntegrationTest {

    /**
     * The number of random regression tests run by testRandom() runs.  Whenever testRandom() finds the case that
     * the snappy codec can't encode/decode, it will print the generated source code of the offending test case.
     * You can always reproduce the problem using it rather than relying on testRandom().
     *
     * The default is 1, but you can increase it to increase the chance of finding any unusual cases.
     **/
    private static final int RANDOM_RUNS = 1;

    @Override
    protected EmbeddedChannel createEncoder() {
        return new EmbeddedChannel(new SnappyFrameEncoder());
    }

    @Override
    protected EmbeddedChannel createDecoder() {
        return new EmbeddedChannel(new SnappyFrameDecoder());
    }

    @Test
    public void test1002() throws Throwable {
        // Data from https://github.com/netty/netty/issues/1002
        final byte[] data = {
                11,    0,    0,    0,    0,    0,   16,   65,   96,  119,  -22,   79,  -43,   76,  -75,  -93,
                11,  104,   96,  -99,  126,  -98,   27,  -36,   40,  117,  -65,   -3,  -57,  -83,  -58,    7,
                114,  -14,   68, -122,  124,   88,  118,   54,   45,  -26,  117,   13,  -45,   -9,   60,  -73,
                -53,  -44,   53,   68,  -77,  -71,  109,   43,  -38,   59,  100,  -12,  -87,   44, -106,  123,
                -107,   38,   13, -117,  -23,  -49,   29,   21,   26,   66,    1,   -1,   -1,   -1,   -1,   -1,
                -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
                -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
                -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
                -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   66,    0, -104,  -49,
                16, -120,   22,    8,  -52,  -54, -102,  -52, -119, -124,  -92,  -71,  101, -120,  -52,  -48,
                45,  -26,  -24,   26,   41,  -13,   36,   64,  -47,   15, -124,   -7,  -16,   91,   96,    0,
                -93,  -42,  101,   20,  -74,   39, -124,   35,   43,  -49,  -21,  -92,  -20,  -41,   79,   41,
                110, -105,   42,  -96,   90,   -9, -100,  -22,  -62,   91,    2,   35,  113,  117,  -71,   66,
                1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
                -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
                -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
                -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
                -1,   -1
        };
        testIdentity(data);
    }

    // These tests were found using testRandom() with large RANDOM_RUNS.

    // Tests that copies do not attempt to overrun into a previous frame chunk
    @Test
    public void test5323211032315942961() {
        testWithSeed(5323211032315942961L);
    }

    // Tests that when generating the hash lookup table for finding copies, we
    // do not exceed the length of the input when there are no copies
    @Test
    public void test7088170877360183401() {
        testWithSeed(7088170877360183401L);
    }

    @Test
    public void testRandom() throws Throwable {
        for (int i = 0; i < RANDOM_RUNS; i++) {
            long seed = rand.nextLong();
            if (seed < 0) {
                // Use only positive seed to get prettier test name. :-)
                continue;
            }

            try {
                testWithSeed(seed);
            } catch (Throwable t) {
                System.out.println("Failed with random seed " + seed + ". Here is a test for it:\n");
                printSeedAsTest(seed);
                throw t;
            }
        }
    }

    private void testWithSeed(long seed) {
        byte[] data = new byte[16 * 1048576];
        new Random(seed).nextBytes(data);
        testIdentity(data);
    }

    private static void printSeedAsTest(long l) {
        System.out.println("@Test");
        System.out.println("@Ignore");
        System.out.println("public void test" + l + "(){");
        System.out.println("    testWithSeed(" + l + "L);");
        System.out.println("}");
    }
}

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