lucene/analysis/common/src/test/org/apache/lucene/analysis/ru/TestRussianAnalyzer.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.ru;

import java.io.IOException;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.BaseTokenStreamTestCase;
import org.apache.lucene.analysis.CharArraySet;

/** Test case for RussianAnalyzer. */
public class TestRussianAnalyzer extends BaseTokenStreamTestCase {

  /** Check that RussianAnalyzer doesnt discard any numbers */
  public void testDigitsInRussianCharset() throws IOException {
    RussianAnalyzer ra = new RussianAnalyzer();
    assertAnalyzesTo(ra, "text 1000", new String[] {"text", "1000"});
    ra.close();
  }

  public void testReusableTokenStream() throws Exception {
    Analyzer a = new RussianAnalyzer();
    assertAnalyzesTo(
        a,
        "Вместе с тем о силе электромагнитной энергии имели представление еще",
        new String[] {"вмест", "сил", "электромагнитн", "энерг", "имел", "представлен"});
    assertAnalyzesTo(
        a, "Но знание это хранилось в тайне", new String[] {"знан", "эт", "хран", "тайн"});
    a.close();
  }

  public void testWithStemExclusionSet() throws Exception {
    CharArraySet set = new CharArraySet(1, true);
    set.add("представление");
    Analyzer a = new RussianAnalyzer(RussianAnalyzer.getDefaultStopSet(), set);
    assertAnalyzesTo(
        a,
        "Вместе с тем о силе электромагнитной энергии имели представление еще",
        new String[] {"вмест", "сил", "электромагнитн", "энерг", "имел", "представление"});
    a.close();
  }

  /** blast some random strings through the analyzer */
  public void testRandomStrings() throws Exception {
    Analyzer analyzer = new RussianAnalyzer();
    checkRandomData(random(), analyzer, 200 * RANDOM_MULTIPLIER);
    analyzer.close();
  }
}