lucene/analysis/kuromoji/src/test/org/apache/lucene/analysis/ja/TestJapaneseReadingFormFilter.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.analysis.ja;

import java.io.IOException;
import java.util.Random;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.BaseTokenStreamTestCase;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.cjk.CJKWidthFilter;
import org.apache.lucene.analysis.core.KeywordTokenizer;
import org.apache.lucene.util.IOUtils;

/** Tests for {@link TestJapaneseReadingFormFilter} */
public class TestJapaneseReadingFormFilter extends BaseTokenStreamTestCase {
  private Analyzer katakanaAnalyzer, romajiAnalyzer;

  @Override
  public void setUp() throws Exception {
    super.setUp();
    katakanaAnalyzer =
        new Analyzer() {
          @Override
          protected TokenStreamComponents createComponents(String fieldName) {
            Tokenizer tokenizer =
                new JapaneseTokenizer(
                    newAttributeFactory(), null, true, JapaneseTokenizer.Mode.SEARCH);
            return new TokenStreamComponents(
                tokenizer, new JapaneseReadingFormFilter(tokenizer, false));
          }
        };
    romajiAnalyzer =
        new Analyzer() {
          @Override
          protected TokenStreamComponents createComponents(String fieldName) {
            Tokenizer tokenizer =
                new JapaneseTokenizer(
                    newAttributeFactory(), null, true, JapaneseTokenizer.Mode.SEARCH);
            return new TokenStreamComponents(
                tokenizer, new JapaneseReadingFormFilter(tokenizer, true));
          }
        };
  }

  @Override
  public void tearDown() throws Exception {
    IOUtils.close(katakanaAnalyzer, romajiAnalyzer);
    super.tearDown();
  }

  public void testKatakanaReadings() throws IOException {
    assertAnalyzesTo(
        katakanaAnalyzer,
        "今夜はロバート先生と話した",
        new String[] {"コンヤ", "ハ", "ロバート", "センセイ", "ト", "ハナシ", "タ"});
  }

  public void testKatakanaReadingsHalfWidth() throws IOException {
    Analyzer a =
        new Analyzer() {
          @Override
          protected TokenStreamComponents createComponents(String fieldName) {
            Tokenizer tokenizer =
                new JapaneseTokenizer(
                    newAttributeFactory(), null, true, JapaneseTokenizer.Mode.SEARCH);
            TokenStream stream = new CJKWidthFilter(tokenizer);
            return new TokenStreamComponents(
                tokenizer, new JapaneseReadingFormFilter(stream, false));
          }
        };
    assertAnalyzesTo(
        a, "今夜はﾛﾊﾞｰﾄ先生と話した", new String[] {"コンヤ", "ハ", "ロバート", "センセイ", "ト", "ハナシ", "タ"});
    a.close();
  }

  public void testRomajiReadings() throws IOException {
    assertAnalyzesTo(
        romajiAnalyzer,
        "今夜はロバート先生と話した",
        new String[] {"kon'ya", "ha", "robato", "sensei", "to", "hanashi", "ta"});
  }

  public void testRomajiReadingsHalfWidth() throws IOException {
    Analyzer a =
        new Analyzer() {
          @Override
          protected TokenStreamComponents createComponents(String fieldName) {
            Tokenizer tokenizer =
                new JapaneseTokenizer(
                    newAttributeFactory(), null, true, JapaneseTokenizer.Mode.SEARCH);
            TokenStream stream = new CJKWidthFilter(tokenizer);
            return new TokenStreamComponents(
                tokenizer, new JapaneseReadingFormFilter(stream, true));
          }
        };
    assertAnalyzesTo(
        a,
        "今夜はﾛﾊﾞｰﾄ先生と話した",
        new String[] {"kon'ya", "ha", "robato", "sensei", "to", "hanashi", "ta"});
    a.close();
  }

  public void testRandomData() throws IOException {
    Random random = random();
    checkRandomData(random, katakanaAnalyzer, 200 * RANDOM_MULTIPLIER);
    checkRandomData(random, romajiAnalyzer, 200 * RANDOM_MULTIPLIER);
  }

  public void testEmptyTerm() throws IOException {
    Analyzer a =
        new Analyzer() {
          @Override
          protected TokenStreamComponents createComponents(String fieldName) {
            Tokenizer tokenizer = new KeywordTokenizer();
            return new TokenStreamComponents(tokenizer, new JapaneseReadingFormFilter(tokenizer));
          }
        };
    checkOneTerm(a, "", "");
    a.close();
  }
}