/*
 * 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.ja.JapaneseTokenizer.Mode;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.util.TestUtil;
import org.apache.lucene.util.UnicodeUtil;

public class TestExtendedMode extends BaseTokenStreamTestCase {
  private Analyzer analyzer;

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

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

  /** simple test for supplementary characters */
  public void testSurrogates() throws IOException {
    assertAnalyzesTo(analyzer, "𩬅艱鍟䇹愯瀛", new String[] {"𩬅", "艱", "鍟", "䇹", "愯", "瀛"});
  }

  /** random test ensuring we don't ever split supplementaries */
  public void testSurrogates2() throws IOException {
    int numIterations = atLeast(500);
    for (int i = 0; i < numIterations; i++) {
      String s = TestUtil.randomUnicodeString(random(), 100);
      try (TokenStream ts = analyzer.tokenStream("foo", s)) {
        CharTermAttribute termAtt = ts.addAttribute(CharTermAttribute.class);
        ts.reset();
        while (ts.incrementToken()) {
          assertTrue(UnicodeUtil.validUTF16String(termAtt));
        }
        ts.end();
      }
    }
  }

  /** blast some random strings through the analyzer */
  public void testRandomStrings() throws Exception {
    Random random = random();
    checkRandomData(random, analyzer, 100 * RANDOM_MULTIPLIER);
  }

  /** blast some random large strings through the analyzer */
  public void testRandomHugeStrings() throws Exception {
    Random random = random();
    checkRandomData(random, analyzer, RANDOM_MULTIPLIER, 4096);
  }

  @Nightly
  public void testRandomHugeStringsAtNight() throws Exception {
    Random random = random();
    checkRandomData(random, analyzer, 3 * RANDOM_MULTIPLIER, 8192);
  }
}