com.mathworks.xzheng.analysis.positional.PositionalPorterStopAnalyzerTest.java Source code

Introduction

Here is the source code for com.mathworks.xzheng.analysis.positional.PositionalPorterStopAnalyzerTest.java

Source

package com.mathworks.xzheng.analysis.positional;

/**
 * Copyright Manning Publications Co.
 *
 * 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 lan      
 */

import junit.framework.TestCase;
import com.mathworks.xzheng.common.TestUtil;

import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.util.Version;

// From chapter 4
public class PositionalPorterStopAnalyzerTest extends TestCase {
    private static PositionalPorterStopAnalyzer porterAnalyzer = new PositionalPorterStopAnalyzer();

    private IndexSearcher searcher;
    private QueryParser parser;

    public void setUp() throws Exception {

        RAMDirectory directory = new RAMDirectory();
        IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_46, porterAnalyzer);
        IndexWriter writer = new IndexWriter(directory, config);

        Document doc = new Document();
        doc.add(new Field("contents", "The quick brown fox jumps over the lazy dog", Field.Store.YES,
                Field.Index.ANALYZED));
        writer.addDocument(doc);
        writer.close();
        searcher = new IndexSearcher(DirectoryReader.open(directory));
        parser = new QueryParser(Version.LUCENE_46, "contents", porterAnalyzer);
    }

    public void testWithSlop() throws Exception {
        parser.setPhraseSlop(1);

        Query query = parser.parse("\"over the lazy\"");

        assertEquals("hole accounted for", 1, TestUtil.hitCount(searcher, query));
    }

    public void testStems() throws Exception {
        Query query = new QueryParser(Version.LUCENE_46, "contents", porterAnalyzer).parse("laziness");
        assertEquals("lazi", 1, TestUtil.hitCount(searcher, query));

        query = parser.parse("\"fox jumped\"");
        assertEquals("jump jumps jumped jumping", 1, TestUtil.hitCount(searcher, query));
    }

}