/*
* 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.
*/
package org.apache.lucene.codecs.lucene50;
import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.codecs.Codec;
import org.apache.lucene.codecs.blocktree.FieldReader;
import org.apache.lucene.codecs.blocktree.Stats;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.BasePostingsFormatTestCase;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.TestUtil;
/**
* Tests BlockPostingsFormat
*/
public class TestBlockPostingsFormat extends BasePostingsFormatTestCase {
private final Codec codec = TestUtil.alwaysPostingsFormat(new Lucene50PostingsFormat());
@Override
protected Codec getCodec() {
return codec;
}
/** Make sure the final sub-block(s) are not skipped. */
public void testFinalBlock() throws Exception {
Directory d = newDirectory();
IndexWriter w = new IndexWriter(d, new IndexWriterConfig(new MockAnalyzer(random())));
for(int i=0;i<25;i++) {
Document doc = new Document();
doc.add(newStringField("field", Character.toString((char) (97+i)), Field.Store.NO));
doc.add(newStringField("field", "z" + Character.toString((char) (97+i)), Field.Store.NO));
w.addDocument(doc);
}
w.forceMerge(1);
DirectoryReader r = DirectoryReader.open(w);
assertEquals(1, r.leaves().size());
FieldReader field = (FieldReader) r.leaves().get(0).reader().fields().terms("field");
// We should see exactly two blocks: one root block (prefix empty string) and one block for z* terms (prefix z):
Stats stats = field.getStats();
assertEquals(0, stats.floorBlockCount);
assertEquals(2, stats.nonFloorBlockCount);
r.close();
w.close();
d.close();
}
private void shouldFail(int minItemsInBlock, int maxItemsInBlock) {
expectThrows(IllegalArgumentException.class, () -> {
new Lucene50PostingsFormat(minItemsInBlock, maxItemsInBlock);
});
}
public void testInvalidBlockSizes() throws Exception {
shouldFail(0, 0);
shouldFail(10, 8);
shouldFail(-1, 10);
shouldFail(10, -1);
shouldFail(10, 12);
}
}