package org.apache.lucene.index;
/*
* 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.
*/
import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.util.TestUtil;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicBoolean;
/**
* Base test case for {@link MergePolicy}.
*/
public abstract class BaseMergePolicyTestCase extends LuceneTestCase {
/** Create a new {@link MergePolicy} instance. */
protected abstract MergePolicy mergePolicy();
public void testForceMergeNotNeeded() throws IOException {
Directory dir = newDirectory();
final AtomicBoolean mayMerge = new AtomicBoolean(true);
final MergeScheduler mergeScheduler = new SerialMergeScheduler() {
@Override
synchronized public void merge(IndexWriter writer, MergeTrigger trigger, boolean newMergesFound) throws IOException {
if (!mayMerge.get() && writer.getNextMerge() != null) {
throw new AssertionError();
}
super.merge(writer, trigger, newMergesFound);
}
};
IndexWriter writer = new IndexWriter(dir, newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random())).setMergeScheduler(mergeScheduler).setMergePolicy(mergePolicy()));
writer.getConfig().getMergePolicy().setNoCFSRatio(random().nextBoolean() ? 0 : 1);
final int numSegments = TestUtil.nextInt(random(), 2, 20);
for (int i = 0; i < numSegments; ++i) {
final int numDocs = TestUtil.nextInt(random(), 1, 5);
for (int j = 0; j < numDocs; ++j) {
writer.addDocument(new Document());
}
writer.getReader().close();
}
for (int i = 5; i >= 0; --i) {
final int segmentCount = writer.getSegmentCount();
final int maxNumSegments = i == 0 ? 1 : TestUtil.nextInt(random(), 1, 10);
mayMerge.set(segmentCount > maxNumSegments);
writer.forceMerge(maxNumSegments);
}
writer.close();
dir.close();
}
}