code: /* LanguageTool, a natural language style checker
   * Copyright (C) 2014 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.patterns;
  
  import org.junit.Test;
  import org.languagetool.FakeLanguage;
  
  import static org.hamcrest.CoreMatchers.is;
  import static org.junit.Assert.assertNull;
  import static org.junit.Assert.assertThat;
  
  public class MatchStateTest {
    
    @Test
    public void testConvertCase() {
      MatchState startUpper = getMatchState(Match.CaseConversion.STARTUPPER);
      assertNull(startUpper.convertCase(null, "Y", new FakeLanguage("en")));
      assertThat(startUpper.convertCase("", "Y", new FakeLanguage("en")), is(""));
      assertThat(startUpper.convertCase("x", "Y", new FakeLanguage("en")), is("X"));
      assertThat(startUpper.convertCase("xxx", "Yyy", new FakeLanguage("en")), is("Xxx"));
      // special case for Dutch:
      assertThat(startUpper.convertCase("ijsselmeer", "Uppercase", new FakeLanguage("nl")), is("IJsselmeer"));
      assertThat(startUpper.convertCase("ijsselmeer", "lowercase", new FakeLanguage("nl")), is("IJsselmeer"));
      assertThat(startUpper.convertCase("ij", "Uppercase", new FakeLanguage("nl")), is("IJ"));
  
      MatchState preserve = getMatchState(Match.CaseConversion.PRESERVE);
      assertThat(preserve.convertCase("xxx", "Yyy", new FakeLanguage("en")), is("Xxx"));
      assertThat(preserve.convertCase("xxx", "yyy", new FakeLanguage("en")), is("xxx"));
      assertThat(preserve.convertCase("xxx", "YYY", new FakeLanguage("en")), is("XXX"));
      // special case for Dutch:
      assertThat(preserve.convertCase("ijsselmeer", "Uppercase", new FakeLanguage("nl")), is("IJsselmeer"));
      assertThat(preserve.convertCase("ijsselmeer", "lowercase", new FakeLanguage("nl")), is("ijsselmeer"));
      assertThat(preserve.convertCase("ijsselmeer", "ALLUPPER", new FakeLanguage("nl")), is("IJSSELMEER"));
  
      MatchState startLower = getMatchState(Match.CaseConversion.STARTLOWER);
      assertThat(startLower.convertCase("xxx", "YYY", new FakeLanguage("en")), is("xxx"));
      assertThat(startLower.convertCase("xxx", "yyy", new FakeLanguage("en")), is("xxx"));
      assertThat(startLower.convertCase("xxx", "Yyy", new FakeLanguage("en")), is("xxx"));
      assertThat(startLower.convertCase("XXX", "Yyy", new FakeLanguage("en")), is("xXX"));
      assertThat(startLower.convertCase("Xxx", "Yyy", new FakeLanguage("en")), is("xxx"));
    }
  
    private MatchState getMatchState(Match.CaseConversion conversion) {
      return new MatchState(new Match("", "", false, "", "", conversion, false, false, Match.IncludeRange.NONE), null);
    }
  
  }
  