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;
  
  import static com.google.common.truth.Truth.assertWithMessage;
  import static com.puppycrawl.tools.checkstyle.internal.utils.TestUtil.isUtilsClassHasPrivateConstructor;
  
  import java.io.File;
  
  import org.junit.jupiter.api.Test;
  
  import com.puppycrawl.tools.checkstyle.api.CheckstyleException;
  
  public class SuppressionsStringPrinterTest extends AbstractTreeTestSupport {
  
      private static final String EOL = System.getProperty("line.separator");
  
      @Override
      protected String getPackageLocation() {
          return "com/puppycrawl/tools/checkstyle/suppressionsstringprinter";
      }
  
      @Test
      public void testIsProperUtilsClass() throws ReflectiveOperationException {
          assertWithMessage("Constructor is not private")
                  .that(isUtilsClassHasPrivateConstructor(SuppressionsStringPrinter.class))
                  .isTrue();
      }
  
      @Test
      public void testCorrect() throws Exception {
          final String expected = "/COMPILATION_UNIT/CLASS_DEF"
                  + "[./IDENT[@text='InputSuppressionsStringPrinter']]" + EOL
                  + "/COMPILATION_UNIT/CLASS_DEF[./IDENT[@text='InputSuppressionsStringPrinter']]"
                  + "/MODIFIERS" + EOL
                  + "/COMPILATION_UNIT/CLASS_DEF[./IDENT[@text='InputSuppressionsStringPrinter']]"
                  + "/MODIFIERS/LITERAL_PUBLIC" + EOL;
  
          final File input = new File(getPath("InputSuppressionsStringPrinter.java"));
          final String lineAndColumnNumber = "3:1";
          final int tabWidth = 2;
          final String result = SuppressionsStringPrinter.printSuppressions(input,
                  lineAndColumnNumber, tabWidth);
  
          assertWithMessage("Invalid xpath queries")
              .that(result)
              .isEqualTo(expected);
      }
  
      @Test
      public void testCustomTabWidth() throws Exception {
          final String expected = "/COMPILATION_UNIT/CLASS_DEF"
                  + "[./IDENT[@text='InputSuppressionsStringPrinter']]"
                  + "/OBJBLOCK/METHOD_DEF[./IDENT[@text='toString']]" + EOL
                  + "/COMPILATION_UNIT/CLASS_DEF[./IDENT"
                  + "[@text='InputSuppressionsStringPrinter']]/OBJBLOCK"
                  + "/METHOD_DEF[./IDENT[@text='toString']]/MODIFIERS" + EOL
                  + "/COMPILATION_UNIT/CLASS_DEF[./IDENT"
                  + "[@text='InputSuppressionsStringPrinter']]/OBJBLOCK"
                  + "/METHOD_DEF[./IDENT[@text='toString']]/MODIFIERS/LITERAL_PUBLIC" + EOL;
  
          final File input = new File(getPath("InputSuppressionsStringPrinter.java"));
          final String lineAndColumnNumber = "5:13";
          final int tabWidth = 4;
          final String result = SuppressionsStringPrinter.printSuppressions(input,
                  lineAndColumnNumber, tabWidth);
  
          assertWithMessage("Invalid xpath queries")
              .that(result)
              .isEqualTo(expected);
      }
  
      @Test
      public void testCustomTabWidthEmptyResult() throws Exception {
          final File input = new File(getPath("InputSuppressionsStringPrinter.java"));
          final String lineAndColumnNumber = "5:13";
          final int tabWidth = 6;
          final String result = SuppressionsStringPrinter.printSuppressions(input,
                  lineAndColumnNumber, tabWidth);
          assertWithMessage("Invalid xpath queries")
              .that(result)
              .isEqualTo(EOL);
      }
  
      @Test
      public void testInvalidLineAndColumnNumberParameter() throws Exception {
          final File input = new File(getPath("InputSuppressionsStringPrinter.java"));
          final String invalidLineAndColumnNumber = "abc-432";
          final int tabWidth = 2;
          try {
              SuppressionsStringPrinter.printSuppressions(input,
                      invalidLineAndColumnNumber, tabWidth);
              assertWithMessage("exception expected").fail();
          }
          catch (IllegalStateException ex) {
              assertWithMessage("Invalid exception message")
                  .that(ex.getMessage())
                  .isEqualTo("abc-432 does not match valid format 'line:column'.");
          }
      }
  
      @Test
      public void testParseFileTextThrowable() throws Exception {
          final File input = new File(getNonCompilablePath("InputSuppressionsStringPrinter.java"));
          final String lineAndColumnNumber = "2:3";
          final int tabWidth = 2;
          try {
              SuppressionsStringPrinter.printSuppressions(input,
                      lineAndColumnNumber, tabWidth);
              assertWithMessage("exception expected").fail();
          }
          catch (CheckstyleException ex) {
              assertWithMessage("Invalid class")
                  .that(ex.getCause())
                  .isInstanceOf(IllegalStateException.class);
              assertWithMessage("Invalid exception message")
                  .that(ex.getCause().toString())
                  .isEqualTo(IllegalStateException.class.getName()
                              + ": 2:0: no viable alternative at input 'classD'");
          }
      }
  
  }
  