package org.apache.lucene.util;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with this
* work for additional information regarding copyright ownership. The ASF
* 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.
*/
public class TestByteBlockPool extends LuceneTestCase {
public void testReadAndWrite() throws IOException {
Counter bytesUsed = Counter.newCounter();
ByteBlockPool pool = new ByteBlockPool(new ByteBlockPool.DirectTrackingAllocator(bytesUsed));
pool.nextBuffer();
boolean reuseFirst = random().nextBoolean();
for (int j = 0; j < 2; j++) {
List<BytesRef> list = new ArrayList<>();
int maxLength = atLeast(500);
final int numValues = atLeast(100);
BytesRef ref = new BytesRef();
for (int i = 0; i < numValues; i++) {
final String value = TestUtil.randomRealisticUnicodeString(random(),
maxLength);
list.add(new BytesRef(value));
ref.copyChars(value);
pool.append(ref);
}
// verify
long position = 0;
for (BytesRef expected : list) {
ref.grow(expected.length);
ref.length = expected.length;
pool.readBytes(position, ref.bytes, ref.offset, ref.length);
assertEquals(expected, ref);
position += ref.length;
}
pool.reset(random().nextBoolean(), reuseFirst);
if (reuseFirst) {
assertEquals(ByteBlockPool.BYTE_BLOCK_SIZE, bytesUsed.get());
} else {
assertEquals(0, bytesUsed.get());
pool.nextBuffer(); // prepare for next iter
}
}
}
}