code: /* LanguageTool, a natural language style checker
   * Copyright (C) 2005 Daniel Naber (http://www.danielnaber.de)
   * 
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
   * USA
   */
  
  package org.languagetool.rules.en;
  
  import org.junit.Before;
  import org.junit.Test;
  import org.languagetool.JLanguageTool;
  import org.languagetool.Languages;
  import org.languagetool.TestTools;
  import org.languagetool.rules.RuleMatch;
  
  import java.io.IOException;
  
  import static org.junit.Assert.assertEquals;
  
  public class ContractionSpellingRuleTest {
  
    private ContractionSpellingRule rule;
    private JLanguageTool lt;
  
    @Before
    public void setUp() throws Exception {
      rule = new ContractionSpellingRule(TestTools.getMessages("en"));
      lt = new JLanguageTool(Languages.getLanguageForShortCode("en"));
    }
  
    @Test
    public void testRule() throws IOException {
  
      // correct sentences:
      assertEquals(0, rule.match(lt.getAnalyzedSentence("It wasn't me.")).length);
      assertEquals(0, rule.match(lt.getAnalyzedSentence("I'm ill.")).length);
      assertEquals(0, rule.match(lt.getAnalyzedSentence("Staatszerfall im südlichen Afrika.")).length);
      assertEquals(0, rule.match(lt.getAnalyzedSentence("by IVE")).length);
      
      // incorrect sentences:
  
      // at the beginning of a sentence
      checkSimpleReplaceRule("Wasnt this great", "Wasn't");
      checkSimpleReplaceRule("YOURE WRONG", "YOU'RE");
      checkSimpleReplaceRule("Dont do this", "Don't");
      //checkSimpleReplaceRule("Ive been doing", "I've");
      // inside sentence
      checkSimpleReplaceRule("It wasnt me", "wasn't");
      checkSimpleReplaceRule("You neednt do this", "needn't");
      checkSimpleReplaceRule("I know Im wrong", "I'm");
  
      //two suggestions
      final RuleMatch[] matches = rule.match(lt.getAnalyzedSentence("Whereve you are"));
      assertEquals(2, matches[0].getSuggestedReplacements().size());
      assertEquals("Where've", matches[0].getSuggestedReplacements().get(0));
      assertEquals("Wherever", matches[0].getSuggestedReplacements().get(1));
  
    }
  
    /**
     * Check if a specific replace rule applies.
     * @param sentence the sentence containing the incorrect/misspelled word.
     * @param word the word that is correct (the suggested replacement).
     */
    private void checkSimpleReplaceRule(String sentence, String word) throws IOException {
      final RuleMatch[] matches = rule.match(lt.getAnalyzedSentence(sentence));
      assertEquals("Invalid matches.length while checking sentence: "
          + sentence, 1, matches.length);
      assertEquals("Invalid replacement count wile checking sentence: "
          + sentence, 1, matches[0].getSuggestedReplacements().size());
      assertEquals("Invalid suggested replacement while checking sentence: "
          + sentence, word, matches[0].getSuggestedReplacements().get(0));
    }
  }
  