/*
* 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.Before;
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.*;
/**
* Test for {@link CountingBytesSource}
*/
public class CountingBytesSourceTest {
private Source<byte[], byte[]> src;
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);
}
@Before
public void setUp() {
Source<byte[], byte[]> parentSrc = new HashMapDB<>();
this.src = new CountingBytesSource(parentSrc);
}
@Test(expected = NullPointerException.class)
public void testKeyNull() {
src.put(null, null);
}
@Test
public void testValueNull() {
src.put(intToKey(0), null);
assertNull(src.get(intToKey(0)));
}
@Test
public void testDelete() {
src.put(intToKey(0), intToValue(0));
src.delete(intToKey(0));
assertNull(src.get(intToKey(0)));
src.put(intToKey(0), intToValue(0));
src.put(intToKey(0), intToValue(0));
src.delete(intToKey(0));
assertEquals(str(intToValue(0)), str(src.get(intToKey(0))));
src.delete(intToKey(0));
assertNull(src.get(intToKey(0)));
src.put(intToKey(1), intToValue(1));
src.put(intToKey(1), intToValue(1));
src.put(intToKey(1), null);
assertEquals(str(intToValue(1)), str(src.get(intToKey(1))));
src.put(intToKey(1), null);
assertNull(src.get(intToKey(1)));
src.put(intToKey(1), intToValue(1));
src.put(intToKey(1), intToValue(2));
src.delete(intToKey(1));
assertEquals(str(intToValue(2)), str(src.get(intToKey(1))));
src.delete(intToKey(1));
assertNull(src.get(intToKey(1)));
}
@Test
public void testALotRefs() {
for (int i = 0; i < 100_000; ++i) {
src.put(intToKey(0), intToValue(0));
}
for (int i = 0; i < 99_999; ++i) {
src.delete(intToKey(0));
assertEquals(str(intToValue(0)), str(src.get(intToKey(0))));
}
src.delete(intToKey(0));
assertNull(src.get(intToKey(0)));
}
@Test
public void testFlushDoNothing() {
for (int i = 0; i < 100; ++i) {
for (int j = 0; j <= i; ++j) {
src.put(intToKey(i), intToValue(i));
}
}
assertEquals(str(intToValue(0)), str(src.get(intToKey(0))));
assertEquals(str(intToValue(99)), str(src.get(intToKey(99))));
assertFalse(src.flush());
assertEquals(str(intToValue(0)), str(src.get(intToKey(0))));
assertEquals(str(intToValue(99)), str(src.get(intToKey(99))));
}
@Test
public void testEmptyValue() {
byte[] value = new byte[0];
src.put(intToKey(0), value);
src.put(intToKey(0), value);
src.delete(intToKey(0));
assertEquals(str(value), str(src.get(intToKey(0))));
src.delete(intToKey(0));
assertNull(src.get(intToKey(0)));
}
}