/*
* 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.datasource.inmem.HashMapDB;
import org.ethereum.vm.DataWord;
import org.junit.Test;
import org.spongycastle.util.encoders.Hex;
import static org.ethereum.crypto.HashUtil.sha3;
import static org.ethereum.util.ByteUtil.longToBytes;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
/**
* Testing {@link ReadWriteCache}
*/
public class ReadWriteCacheTest {
private byte[] intToKey(int i) {
return sha3(longToBytes(i));
}
private byte[] intToValue(int i) {
return (new DataWord(i)).getData();
}
private String str(Object obj) {
if (obj == null) return null;
return Hex.toHexString((byte[]) obj);
}
@Test
public void testSimple() {
Source<byte[], byte[]> src = new HashMapDB<>();
ReadWriteCache<byte[], byte[]> cache = new ReadWriteCache.BytesKey<>(src, WriteCache.CacheType.SIMPLE);
for (int i = 0; i < 10_000; ++i) {
cache.put(intToKey(i), intToValue(i));
}
// Everything is cached
assertEquals(str(intToValue(0)), str(cache.getCached(intToKey(0)).value()));
assertEquals(str(intToValue(9_999)), str(cache.getCached(intToKey(9_999)).value()));
// Source is empty
assertNull(src.get(intToKey(0)));
assertNull(src.get(intToKey(9_999)));
// After flush src is filled
cache.flush();
assertEquals(str(intToValue(9_999)), str(src.get(intToKey(9_999))));
assertEquals(str(intToValue(0)), str(src.get(intToKey(0))));
// Deleting key that is currently in cache
cache.put(intToKey(0), intToValue(12345));
assertEquals(str(intToValue(12345)), str(cache.getCached(intToKey(0)).value()));
cache.delete(intToKey(0));
assertTrue(null == cache.getCached(intToKey(0)) || null == cache.getCached(intToKey(0)).value());
assertEquals(str(intToValue(0)), str(src.get(intToKey(0))));
cache.flush();
assertNull(src.get(intToKey(0)));
// No size estimators
assertEquals(0, cache.estimateCacheSize());
}
}