package org.apache.lucene.search;
/**
* Copyright 2004 The Apache Software Foundation
*
* Licensed 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 junit.framework.TestCase;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.analysis.SimpleAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
/** Document boost unit test.
*
* @author Doug Cutting
* @version $Revision: 150694 $
*/
public class TestDocBoost extends TestCase {
public TestDocBoost(String name) {
super(name);
}
public void testDocBoost() throws Exception {
RAMDirectory store = new RAMDirectory();
IndexWriter writer = new IndexWriter(store, new SimpleAnalyzer(), true);
Field f1 = Field.Text("field", "word");
Field f2 = Field.Text("field", "word");
f2.setBoost(2.0f);
Document d1 = new Document();
Document d2 = new Document();
Document d3 = new Document();
Document d4 = new Document();
d3.setBoost(3.0f);
d4.setBoost(2.0f);
d1.add(f1); // boost = 1
d2.add(f2); // boost = 2
d3.add(f1); // boost = 3
d4.add(f2); // boost = 4
writer.addDocument(d1);
writer.addDocument(d2);
writer.addDocument(d3);
writer.addDocument(d4);
writer.optimize();
writer.close();
final float[] scores = new float[4];
new IndexSearcher(store).search
(new TermQuery(new Term("field", "word")),
new HitCollector() {
public final void collect(int doc, float score) {
scores[doc] = score;
}
});
float lastScore = 0.0f;
for (int i = 0; i < 4; i++) {
assertTrue(scores[i] > lastScore);
lastScore = scores[i];
}
}
}
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