lucene/analysis/icu/src/test/org/apache/lucene/analysis/icu/segmentation/TestICUTokenizerCJK.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.icu.segmentation;

import java.util.Random;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.BaseTokenStreamTestCase;
import org.apache.lucene.util.LuceneTestCase.AwaitsFix;

/** test ICUTokenizer with dictionary-based CJ segmentation */
@AwaitsFix(bugUrl = "https://issues.apache.org/jira/browse/LUCENE-8222")
public class TestICUTokenizerCJK extends BaseTokenStreamTestCase {
  Analyzer a;

  @Override
  public void setUp() throws Exception {
    super.setUp();
    a =
        new Analyzer() {
          @Override
          protected TokenStreamComponents createComponents(String fieldName) {
            return new TokenStreamComponents(
                new ICUTokenizer(newAttributeFactory(), new DefaultICUTokenizerConfig(true, true)));
          }
        };
  }

  @Override
  public void tearDown() throws Exception {
    a.close();
    super.tearDown();
  }

  /** test stolen from smartcn */
  public void testSimpleChinese() throws Exception {
    assertAnalyzesTo(a, "我购买了道具和服装。", new String[] {"我", "购买", "了", "道具", "和", "服装"});
  }

  public void testTraditionalChinese() throws Exception {
    assertAnalyzesTo(a, "我購買了道具和服裝。", new String[] {"我", "購買", "了", "道具", "和", "服裝"});
    assertAnalyzesTo(
        a,
        "定義切分字串的基本單位是訂定分詞標準的首要工作", // From
        // http://godel.iis.sinica.edu.tw/CKIP/paper/wordsegment_standard.pdf
        new String[] {
          "定義", "切", "分", "字串", "的", "基本", "單位", "是", "訂定", "分詞", "標準", "的", "首要", "工作"
        });
  }

  public void testChineseNumerics() throws Exception {
    assertAnalyzesTo(a, "９４８３", new String[] {"９４８３"});
    assertAnalyzesTo(a, "院內分機９４８３。", new String[] {"院", "內", "分機", "９４８３"});
    assertAnalyzesTo(a, "院內分機9483。", new String[] {"院", "內", "分機", "9483"});
  }

  /** test stolen from kuromoji */
  public void testSimpleJapanese() throws Exception {
    assertAnalyzesTo(
        a, "それはまだ実験段階にあります", new String[] {"それ", "は", "まだ", "実験", "段階", "に", "あり", "ます"});
  }

  /** dictionary segmentation with emoji */
  public void testSimpleJapaneseWithEmoji() throws Exception {
    assertAnalyzesTo(
        a, "それはまだ実験段階にあります💩", new String[] {"それ", "は", "まだ", "実験", "段階", "に", "あり", "ます", "💩"});
  }

  public void testJapaneseTypes() throws Exception {
    assertAnalyzesTo(
        a,
        "仮名遣い カタカナ",
        new String[] {"仮名遣い", "カタカナ"},
        new String[] {"<IDEOGRAPHIC>", "<IDEOGRAPHIC>"});
  }

  public void testKorean() throws Exception {
    // Korean words
    assertAnalyzesTo(a, "안녕하세요 한글입니다", new String[] {"안녕하세요", "한글입니다"});
  }

  /** make sure that we still tag korean as HANGUL (for further decomposition/ngram/whatever) */
  public void testKoreanTypes() throws Exception {
    assertAnalyzesTo(a, "훈민정음", new String[] {"훈민정음"}, new String[] {"<HANGUL>"});
  }

  /** blast some random strings through the analyzer */
  public void testRandomStrings() throws Exception {
    checkRandomData(random(), a, 10000 * RANDOM_MULTIPLIER);
  }

  /** blast some random large strings through the analyzer */
  public void testRandomHugeStrings() throws Exception {
    Random random = random();
    checkRandomData(random, a, 10 * RANDOM_MULTIPLIER, 8192);
  }
}