code: ///////////////////////////////////////////////////////////////////////////////////////////////
  // checkstyle: Checks Java source code and other text files for adherence to a set of rules.
  // Copyright (C) 2001-2023 the original author or authors.
  //
  // 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  ///////////////////////////////////////////////////////////////////////////////////////////////
  
  package com.google.checkstyle.test.chapter2filebasic.rule232specialescape;
  
  import org.junit.jupiter.api.Test;
  
  import com.google.checkstyle.test.base.AbstractGoogleModuleTestSupport;
  import com.puppycrawl.tools.checkstyle.api.Configuration;
  
  public class IllegalTokenTextTest extends AbstractGoogleModuleTestSupport {
  
      @Override
      protected String getPackageLocation() {
          return "com/google/checkstyle/test/chapter2filebasic/rule232specialescape";
      }
  
      @Test
      public void testIllegalTokens() throws Exception {
          final String message = "Consider using special escape sequence instead of octal value or "
                  + "Unicode escaped value.";
  
          final String[] expected = {
              "18:27: " + message,
              "19:27: " + message,
              "22:25: " + message,
              "23:25: " + message,
              "25:16: " + message,
              "43:21: " + message,
              "44:21: " + message,
              "45:21: " + message,
              "46:21: " + message,
              "47:21: " + message,
              "48:21: " + message,
              "49:21: " + message,
              "54:21: " + message,
              "55:21: " + message,
              "56:21: " + message,
              "57:21: " + message,
              "58:21: " + message,
              "59:21: " + message,
              "60:21: " + message,
              "61:21: " + message,
              "69:31: " + message,
              "70:31: " + message,
              "73:29: " + message,
              "74:29: " + message,
              "76:20: " + message,
              "94:25: " + message,
              "95:25: " + message,
              "96:25: " + message,
              "97:25: " + message,
              "98:25: " + message,
              "99:25: " + message,
              "100:25: " + message,
              "105:25: " + message,
              "106:25: " + message,
              "107:25: " + message,
              "108:25: " + message,
              "109:25: " + message,
              "110:25: " + message,
              "111:25: " + message,
              "112:25: " + message,
              "119:35: " + message,
              "120:35: " + message,
              "123:33: " + message,
              "124:33: " + message,
              "126:24: " + message,
              "144:29: " + message,
              "145:29: " + message,
              "146:29: " + message,
              "147:29: " + message,
              "148:29: " + message,
              "149:29: " + message,
              "150:29: " + message,
              "155:29: " + message,
              "156:29: " + message,
              "157:29: " + message,
              "158:29: " + message,
              "159:29: " + message,
              "160:29: " + message,
              "161:29: " + message,
              "162:29: " + message,
          };
  
          final Configuration checkConfig = getModuleConfig("IllegalTokenText");
          final String filePath = getPath("InputIllegalTokenText.java");
  
          final Integer[] warnList = getLinesWithWarn(filePath);
          verify(checkConfig, filePath, expected, warnList);
      }
  
  }
  