lucene/core/src/test/org/apache/lucene/search/TestNot.java

/*
 * 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.search;


import org.apache.lucene.document.Field;
import org.apache.lucene.index.Term;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.store.Directory;
import org.apache.lucene.document.Document;

/** Similarity unit test.
 *
 *
 */
public class TestNot extends LuceneTestCase {

  public void testNot() throws Exception {
    Directory store = newDirectory();
    RandomIndexWriter writer = new RandomIndexWriter(random(), store);

    Document d1 = new Document();
    d1.add(newTextField("field", "a b", Field.Store.YES));

    writer.addDocument(d1);
    IndexReader reader = writer.getReader();

    IndexSearcher searcher = newSearcher(reader);

    BooleanQuery.Builder query = new BooleanQuery.Builder();
    query.add(new TermQuery(new Term("field", "a")), BooleanClause.Occur.SHOULD);
    query.add(new TermQuery(new Term("field", "b")), BooleanClause.Occur.MUST_NOT);

    ScoreDoc[] hits = searcher.search(query.build(), 1000).scoreDocs;
    assertEquals(0, hits.length);
    writer.close();
    reader.close();
    store.close();
  }
}