org.elasticsearch.util.lucene.search.MoreLikeThisQueryTests.java Source code

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Here is the source code for org.elasticsearch.util.lucene.search.MoreLikeThisQueryTests.java

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/*
 * Licensed to Elastic Search and Shay Banon under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Elastic Search 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.elasticsearch.util.lucene.search;

import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
import org.elasticsearch.util.lucene.Lucene;
import org.testng.annotations.Test;

import static org.elasticsearch.util.lucene.DocumentBuilder.*;
import static org.elasticsearch.util.lucene.IndexWriters.*;
import static org.hamcrest.MatcherAssert.*;
import static org.hamcrest.Matchers.*;

/**
 * @author kimchy (shay.banon)
 */
@Test
public class MoreLikeThisQueryTests {

    @Test
    public void testSimple() throws Exception {
        Directory dir = new RAMDirectory();
        IndexWriter indexWriter = new IndexWriter(dir, Lucene.STANDARD_ANALYZER, true,
                IndexWriter.MaxFieldLength.UNLIMITED);
        indexWriter.commit();
        assertThat("Index is empty after creation and commit", estimateRamSize(indexWriter), equalTo(0l));

        indexWriter.addDocument(doc().add(field("_id", "1")).add(field("text", "lucene")).build());
        indexWriter.addDocument(doc().add(field("_id", "2")).add(field("text", "lucene release")).build());

        IndexReader reader = indexWriter.getReader();
        IndexSearcher searcher = new IndexSearcher(reader);

        MoreLikeThisQuery mltQuery = new MoreLikeThisQuery("lucene", new String[] { "text" },
                Lucene.STANDARD_ANALYZER);
        mltQuery.setLikeText("lucene");
        mltQuery.setMinTermFrequency(1);
        mltQuery.setMinDocFreq(1);
        long count = Lucene.count(searcher, mltQuery, -1);
        assertThat(count, equalTo(2l));

        reader.close();
        indexWriter.close();
    }
}