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.puppycrawl.tools.checkstyle.checks.whitespace;
  
  import static com.puppycrawl.tools.checkstyle.checks.whitespace.FileTabCharacterCheck.MSG_CONTAINS_TAB;
  import static com.puppycrawl.tools.checkstyle.checks.whitespace.FileTabCharacterCheck.MSG_FILE_CONTAINS_TAB;
  
  import org.junit.jupiter.api.Test;
  
  import com.puppycrawl.tools.checkstyle.AbstractModuleTestSupport;
  
  public class FileTabCharacterCheckTest
      extends AbstractModuleTestSupport {
  
      @Override
      protected String getPackageLocation() {
          return "com/puppycrawl/tools/checkstyle/checks/whitespace/filetabcharacter";
      }
  
      @Test
      public void testDefault() throws Exception {
          final String[] expected = {
              "22:25: " + getCheckMessage(MSG_FILE_CONTAINS_TAB),
          };
          verifyWithInlineConfigParser(
                  getPath("InputFileTabCharacterSimple.java"),
              expected);
      }
  
      @Test
      public void testCustomMessage() throws Exception {
          final String msgFileContainsTab =
              "File contains tab characters (this is the first instance) :)";
          final String[] expected = {
              "14:25: " + msgFileContainsTab,
          };
          verifyWithInlineConfigParser(
              getPath("InputFileTabCharacterCustomMessage.java"),
              expected);
      }
  
      @Test
      public void testVerbose() throws Exception {
          final String[] expected = {
              "22:25: " + getCheckMessage(MSG_CONTAINS_TAB),
              "148:35: " + getCheckMessage(MSG_CONTAINS_TAB),
              "151:28: " + getCheckMessage(MSG_CONTAINS_TAB),
              "159:9: " + getCheckMessage(MSG_CONTAINS_TAB),
              "160:10: " + getCheckMessage(MSG_CONTAINS_TAB),
              "161:1: " + getCheckMessage(MSG_CONTAINS_TAB),
              "162:3: " + getCheckMessage(MSG_CONTAINS_TAB),
              "163:3: " + getCheckMessage(MSG_CONTAINS_TAB),
          };
          verifyWithInlineConfigParser(
                  getPath("InputFileTabCharacterSimple1.java"),
              expected);
      }
  
  }
  