lucene/analysis/common/src/test/org/apache/lucene/analysis/miscellaneous/TestHyphenatedWordsFilter.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.miscellaneous;

import java.io.IOException;
import java.io.StringReader;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.BaseTokenStreamTestCase;
import org.apache.lucene.analysis.MockTokenizer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.core.KeywordTokenizer;

/**
 * HyphenatedWordsFilter test
 */
public class TestHyphenatedWordsFilter extends BaseTokenStreamTestCase {
  public void testHyphenatedWords() throws Exception {
    String input = "ecologi-\r\ncal devel-\r\n\r\nop compre-\u0009hensive-hands-on and ecologi-\ncal";
    // first test
    TokenStream ts = new MockTokenizer(MockTokenizer.WHITESPACE, false);
    ((Tokenizer)ts).setReader(new StringReader(input));
    ts = new HyphenatedWordsFilter(ts);
    assertTokenStreamContents(ts,
        new String[] { "ecological", "develop", "comprehensive-hands-on", "and", "ecological" });
  }

  /**
   * Test that HyphenatedWordsFilter behaves correctly with a final hyphen
   */
  public void testHyphenAtEnd() throws Exception {
    String input = "ecologi-\r\ncal devel-\r\n\r\nop compre-\u0009hensive-hands-on and ecology-";
      // first test
    TokenStream ts = new MockTokenizer(MockTokenizer.WHITESPACE, false);
    ((Tokenizer)ts).setReader(new StringReader(input));
    ts = new HyphenatedWordsFilter(ts);
    assertTokenStreamContents(ts,
        new String[] { "ecological", "develop", "comprehensive-hands-on", "and", "ecology-" });
  }

  public void testOffsets() throws Exception {
    String input = "abc- def geh 1234- 5678-";
    TokenStream ts = new MockTokenizer(MockTokenizer.WHITESPACE, false);
    ((Tokenizer)ts).setReader(new StringReader(input));
    ts = new HyphenatedWordsFilter(ts);
    assertTokenStreamContents(ts, 
        new String[] { "abcdef", "geh", "12345678-" },
        new int[] { 0, 9, 13 },
        new int[] { 8, 12, 24 });
  }

  /** blast some random strings through the analyzer */
  public void testRandomString() throws Exception {
    Analyzer a = new Analyzer() {

      @Override
      protected TokenStreamComponents createComponents(String fieldName) {
        Tokenizer tokenizer = new MockTokenizer(MockTokenizer.WHITESPACE, false);
        return new TokenStreamComponents(tokenizer, new HyphenatedWordsFilter(tokenizer));
      }
    };
    
    checkRandomData(random(), a, 200 * RANDOM_MULTIPLIER);
    a.close();
  }
  
  public void testEmptyTerm() throws IOException {
    Analyzer a = new Analyzer() {
      @Override
      protected TokenStreamComponents createComponents(String fieldName) {
        Tokenizer tokenizer = new KeywordTokenizer();
        return new TokenStreamComponents(tokenizer, new HyphenatedWordsFilter(tokenizer));
      }
    };
    checkOneTerm(a, "", "");
    a.close();
  }
}