code: /* LanguageTool, a natural language style checker
   * Copyright (C) 2012 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;
  
  import org.junit.Test;
  import org.languagetool.Language;
  import org.languagetool.TestTools;
  import org.languagetool.rules.patterns.PatternRule;
  import org.languagetool.rules.patterns.PatternToken;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  
  import static org.junit.Assert.*;
  
  @SuppressWarnings("MagicNumber")
  public class RuleWithMaxFilterTest {
  
    private static final Language language = TestTools.getDemoLanguage();
  
    @Test
    public void testFilter() {
      List<PatternToken> fakePatternTokens = new ArrayList<>();
      PatternRule rule1 = new PatternRule("id1", language, fakePatternTokens, "desc1", "msg1", "shortMsg1");
      PatternRule rule2 = new PatternRule("id1", language, fakePatternTokens, "desc2", "msg2", "shortMsg2");
      RuleMatch match1 = new RuleMatch(rule1, null, 10, 20, "Match1");
      RuleMatch match2 = new RuleMatch(rule2, null, 15, 25, "Match2");
      RuleWithMaxFilter filter = new RuleWithMaxFilter();
      List<RuleMatch> filteredMatches1 = filter.filter(Arrays.asList(match1, match2));
      assertEquals(2, filteredMatches1.size());
      RuleMatch match3 = new RuleMatch(rule2, null, 11, 19, "Match3");
      List<RuleMatch> filteredMatches2 = filter.filter(Arrays.asList(match1, match3));
      assertEquals(1, filteredMatches2.size());
    }
  
    @Test
    public void testNoFilteringIfNotOverlapping() {
      List<PatternToken> fakePatternTokens = new ArrayList<>();
      PatternRule rule1 = new PatternRule("id1", language, fakePatternTokens, "desc1", "msg1", "shortMsg1");
      PatternRule rule2 = new PatternRule("id1", language, fakePatternTokens, "desc2", "msg2", "shortMsg2");
      RuleMatch match1 = new RuleMatch(rule1, null, 10, 20, "Match1");
      RuleMatch match2 = new RuleMatch(rule2, null, 21, 25, "Match2");
      RuleWithMaxFilter filter = new RuleWithMaxFilter();
      List<RuleMatch> filteredMatches = filter.filter(Arrays.asList(match1, match2));
      assertEquals(2, filteredMatches.size());
    }
  
    @Test
    public void testNoFilteringIfDifferentRulegroups() {
      List<PatternToken> fakePatternTokens = new ArrayList<>();
      Rule rule1 = new PatternRule("id1", language, fakePatternTokens, "desc1", "msg1", "shortMsg1");
      Rule rule2 = new PatternRule("id2", language, fakePatternTokens, "desc2", "msg2", "shortMsg2");
      RuleMatch match1 = new RuleMatch(rule1, null, 10, 20, "Match1");
      RuleMatch match2 = new RuleMatch(rule2, null, 15, 25, "Match2");
      RuleWithMaxFilter filter = new RuleWithMaxFilter();
      List<RuleMatch> filteredMatches1 = filter.filter(Arrays.asList(match1, match2));
      assertEquals(2, filteredMatches1.size());
      RuleMatch match3 = new RuleMatch(rule2, null, 11, 19, "Match3");
      List<RuleMatch> filteredMatches2 = filter.filter(Arrays.asList(match1, match3));
      assertEquals(2, filteredMatches2.size());
    }
  
    @Test
    public void testOverlaps() {
      RuleWithMaxFilter filter = new RuleWithMaxFilter();
  
      assertTrue(filter.includes(makeRuleMatch(10, 20), makeRuleMatch(10, 20)));
      assertFalse(filter.includes(makeRuleMatch(10, 20), makeRuleMatch(5, 11)));
      assertFalse(filter.includes(makeRuleMatch(10, 20), makeRuleMatch(11, 21)));
      assertTrue(filter.includes(makeRuleMatch(10, 20), makeRuleMatch(11, 19)));
      assertFalse(filter.includes(makeRuleMatch(10, 20), makeRuleMatch(1, 10)));
      assertTrue(filter.includes(makeRuleMatch(10, 20), makeRuleMatch(19, 20)));
  
      assertFalse(filter.includes(makeRuleMatch(10, 20), makeRuleMatch(21, 30)));
      assertFalse(filter.includes(makeRuleMatch(10, 20), makeRuleMatch(1, 9)));
    }
  
    private RuleMatch makeRuleMatch(int fromPos, int toPos) {
      return new RuleMatch(new FakeRule(), null, fromPos, toPos, "FakeMatch1");
    }
  
  }
  