JournalPruneTest.java

/*
 * Copyright (c) [2016] [ <ether.camp> ]
 * This file is part of the ethereumJ library.
 *
 * The ethereumJ library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The ethereumJ library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the ethereumJ library. If not, see <http://www.gnu.org/licenses/>.
 */
package org.ethereum.datasource;

import org.ethereum.crypto.HashUtil;
import org.ethereum.datasource.inmem.HashMapDB;
import org.ethereum.util.ByteUtil;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

/**
 * Created by Anton Nashatyrev on 27.07.2016.
 */
public class JournalPruneTest {

    class StringJDS extends JournalSource<byte[]> {
        final HashMapDB<byte[]> mapDB;
        final Source<byte[], byte[]> db;

        public StringJDS() {
            this(new HashMapDB<byte[]>());
        }

        private StringJDS(HashMapDB<byte[]> mapDB) {
            this(mapDB, new CountingBytesSource(mapDB));
        }

        private StringJDS(HashMapDB<byte[]> mapDB, Source<byte[], byte[]> db) {
            super(db);
            this.db = db;
            this.mapDB = mapDB;
        }

        public synchronized void put(String key) {
            super.put(key.getBytes(), key.getBytes());
        }

        public synchronized void delete(String key) {
            super.delete(key.getBytes());
        }

        public String get(String key) {
            return new String(super.get(key.getBytes()));
        }
    }

    private void checkDb(StringJDS db, String ... keys) {
        assertEquals(keys.length, db.mapDB.keys().size());
        for (String key : keys) {
            assertTrue(db.get(key.getBytes()) != null);
        }
    }

    private void putKeys(StringJDS db, String ... keys) {
        for (String key : keys) {
            db.put(key.getBytes(), key.getBytes());
        }
    }

    @Test
    public void simpleTest() {
        StringJDS jds = new StringJDS();

        putKeys(jds, "a1", "a2");

        jds.put("a3");
        jds.delete("a2");
        jds.commitUpdates(hashInt(1));
        jds.put("a2");
        jds.delete("a3");
        jds.commitUpdates(hashInt(2));
        jds.delete("a2");
        jds.commitUpdates(hashInt(3));

        jds.persistUpdate(hashInt(1));
        checkDb(jds, "a1", "a2", "a3");

        jds.persistUpdate(hashInt(2));
        checkDb(jds, "a1", "a2");

        jds.persistUpdate(hashInt(3));
        checkDb(jds, "a1");

        assertEquals(0, ((HashMapDB) jds.journal).getStorage().size());
    }

    @Test
    public void forkTest1() {
        StringJDS jds = new StringJDS();

        putKeys(jds, "a1", "a2", "a3");

        jds.put("a4");
        jds.put("a1");
        jds.delete("a2");
        jds.commitUpdates(hashInt(1));
        jds.put("a5");
        jds.delete("a3");
        jds.put("a2");
        jds.put("a1");
        jds.commitUpdates(hashInt(2));

        checkDb(jds, "a1", "a2", "a3", "a4", "a5");

        jds.persistUpdate(hashInt(1));
        jds.revertUpdate(hashInt(2));
        checkDb(jds, "a1", "a3", "a4");

        assertEquals(0, ((HashMapDB) jds.journal).getStorage().size());
    }

    @Test
    public void forkTest2() {
        StringJDS jds = new StringJDS();

        putKeys(jds, "a1", "a2", "a3");

        jds.delete("a1");
        jds.delete("a3");
        jds.commitUpdates(hashInt(1));
        jds.put("a4");
        jds.commitUpdates(hashInt(2));
        jds.commitUpdates(hashInt(3));
        jds.put("a1");
        jds.delete("a2");
        jds.commitUpdates(hashInt(4));
        jds.put("a4");
        jds.commitUpdates(hashInt(5));
        jds.put("a3");
        jds.commitUpdates(hashInt(6));

        checkDb(jds, "a1", "a2", "a3", "a4");

        jds.persistUpdate(hashInt(1));
        jds.revertUpdate(hashInt(2));
        checkDb(jds, "a1", "a2", "a3", "a4");

        jds.persistUpdate(hashInt(3));
        jds.revertUpdate(hashInt(4));
        jds.revertUpdate(hashInt(5));
        checkDb(jds, "a2", "a3");

        jds.persistUpdate(hashInt(6));
        checkDb(jds, "a2", "a3");

        assertEquals(0, ((HashMapDB) jds.journal).getStorage().size());
    }

    @Test
    public void forkTest3() {
        StringJDS jds = new StringJDS();

        putKeys(jds, "a1");

        jds.put("a2");
        jds.commitUpdates(hashInt(1));
        jds.put("a1");
        jds.put("a2");
        jds.put("a3");
        jds.commitUpdates(hashInt(2));
        jds.put("a1");
        jds.put("a2");
        jds.put("a3");
        jds.commitUpdates(hashInt(3));

        checkDb(jds, "a1", "a2", "a3");

        jds.persistUpdate(hashInt(1));
        jds.revertUpdate(hashInt(2));
        jds.revertUpdate(hashInt(3));
        checkDb(jds, "a1", "a2");

        assertEquals(0, ((HashMapDB) jds.journal).getStorage().size());
    }

    public byte[] hashInt(int i) {
        return HashUtil.sha3(ByteUtil.intToBytes(i));
    }
}