lucene/analysis/kuromoji/src/test/org/apache/lucene/analysis/ja/TestJapanesePartOfSpeechStopFilterFactory.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.io.StringReader;
import java.util.HashMap;
import java.util.Map;
import org.apache.lucene.analysis.BaseTokenStreamTestCase;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.util.ClasspathResourceLoader;
import org.apache.lucene.util.Version;

/** Simple tests for {@link JapanesePartOfSpeechStopFilterFactory} */
public class TestJapanesePartOfSpeechStopFilterFactory extends BaseTokenStreamTestCase {
  public void testBasics() throws IOException {
    String tags = "#  verb-main:\n" + "動詞-自立\n";

    JapaneseTokenizerFactory tokenizerFactory =
        new JapaneseTokenizerFactory(new HashMap<String, String>());
    tokenizerFactory.inform(new StringMockResourceLoader(""));
    TokenStream ts = tokenizerFactory.create();
    ((Tokenizer) ts).setReader(new StringReader("私は制限スピードを超える。"));
    Map<String, String> args = new HashMap<>();
    args.put("luceneMatchVersion", Version.LATEST.toString());
    args.put("tags", "stoptags.txt");
    JapanesePartOfSpeechStopFilterFactory factory = new JapanesePartOfSpeechStopFilterFactory(args);
    factory.inform(new StringMockResourceLoader(tags));
    ts = factory.create(ts);
    assertTokenStreamContents(ts, new String[] {"私", "は", "制限", "スピード", "を"});
  }

  /** If we don't specify "tags", then load the default stop tags. */
  public void testNoTagsSpecified() throws IOException {
    JapaneseTokenizerFactory tokenizerFactory =
        new JapaneseTokenizerFactory(new HashMap<String, String>());
    tokenizerFactory.inform(new StringMockResourceLoader(""));
    TokenStream ts = tokenizerFactory.create();
    ((Tokenizer) ts).setReader(new StringReader("私は制限スピードを超える。"));
    Map<String, String> args = new HashMap<>();
    args.put("luceneMatchVersion", Version.LATEST.toString());
    JapanesePartOfSpeechStopFilterFactory factory = new JapanesePartOfSpeechStopFilterFactory(args);
    factory.inform(new ClasspathResourceLoader(JapaneseAnalyzer.class));
    ts = factory.create(ts);
    assertTokenStreamContents(ts, new String[] {"私", "制限", "スピード", "超える"});
  }

  /** Test that bogus arguments result in exception */
  public void testBogusArguments() throws Exception {
    IllegalArgumentException expected =
        expectThrows(
            IllegalArgumentException.class,
            () -> {
              new JapanesePartOfSpeechStopFilterFactory(
                  new HashMap<String, String>() {
                    {
                      put("luceneMatchVersion", Version.LATEST.toString());
                      put("bogusArg", "bogusValue");
                    }
                  });
            });
    assertTrue(expected.getMessage().contains("Unknown parameters"));
  }
}