TestBooleanQuery.java

package org.apache.lucene.search;

/**
 * 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.index.IndexWriter;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.analysis.WhitespaceAnalyzer;
import org.apache.lucene.store.MockRAMDirectory;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.index.Term;

public class TestBooleanQuery extends LuceneTestCase {
  
  public void testEquality() throws Exception {
    BooleanQuery bq1 = new BooleanQuery();
    bq1.add(new TermQuery(new Term("field", "value1")), BooleanClause.Occur.SHOULD);
    bq1.add(new TermQuery(new Term("field", "value2")), BooleanClause.Occur.SHOULD);
    BooleanQuery nested1 = new BooleanQuery();
    nested1.add(new TermQuery(new Term("field", "nestedvalue1")), BooleanClause.Occur.SHOULD);
    nested1.add(new TermQuery(new Term("field", "nestedvalue2")), BooleanClause.Occur.SHOULD);
    bq1.add(nested1, BooleanClause.Occur.SHOULD);

    BooleanQuery bq2 = new BooleanQuery();
    bq2.add(new TermQuery(new Term("field", "value1")), BooleanClause.Occur.SHOULD);
    bq2.add(new TermQuery(new Term("field", "value2")), BooleanClause.Occur.SHOULD);
    BooleanQuery nested2 = new BooleanQuery();
    nested2.add(new TermQuery(new Term("field", "nestedvalue1")), BooleanClause.Occur.SHOULD);
    nested2.add(new TermQuery(new Term("field", "nestedvalue2")), BooleanClause.Occur.SHOULD);
    bq2.add(nested2, BooleanClause.Occur.SHOULD);

    assertEquals(bq1, bq2);
  }

  public void testException() {
    try {
      BooleanQuery.setMaxClauseCount(0);
      fail();
    } catch (IllegalArgumentException e) {
      // okay
    }
  }

  // LUCENE-1630
  public void testNullOrSubScorer() throws Throwable {
    Directory dir = new MockRAMDirectory();
    IndexWriter w = new IndexWriter(dir, new WhitespaceAnalyzer(), IndexWriter.MaxFieldLength.UNLIMITED);
    Document doc = new Document();
    doc.add(new Field("field", "a b c d", Field.Store.NO, Field.Index.ANALYZED));
    w.addDocument(doc);
    IndexReader r = w.getReader();
    IndexSearcher s = new IndexSearcher(r);
    BooleanQuery q = new BooleanQuery();
    q.add(new TermQuery(new Term("field", "a")), BooleanClause.Occur.SHOULD);

    // PhraseQuery w/ no terms added returns a null scorer
    PhraseQuery pq = new PhraseQuery();
    q.add(pq, BooleanClause.Occur.SHOULD);
    assertEquals(1, s.search(q, 10).totalHits);

    // A required clause which returns null scorer should return null scorer to
    // IndexSearcher.
    q = new BooleanQuery();
    pq = new PhraseQuery();
    q.add(new TermQuery(new Term("field", "a")), BooleanClause.Occur.SHOULD);
    q.add(pq, BooleanClause.Occur.MUST);
    assertEquals(0, s.search(q, 10).totalHits);

    DisjunctionMaxQuery dmq = new DisjunctionMaxQuery(1.0f);
    dmq.add(new TermQuery(new Term("field", "a")));
    dmq.add(pq);
    assertEquals(1, s.search(dmq, 10).totalHits);
    
    r.close();
    w.close();
    dir.close();
  }
  
}