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.utils;
  
  import static com.google.common.truth.Truth.assertWithMessage;
  import static com.puppycrawl.tools.checkstyle.internal.utils.TestUtil.isUtilsClassHasPrivateConstructor;
  
  import org.junit.jupiter.api.Test;
  
  import com.puppycrawl.tools.checkstyle.api.DetailAST;
  import com.puppycrawl.tools.checkstyle.api.TokenTypes;
  
  public class ParserUtilTest {
  
      @Test
      public void testIsProperUtilsClass() throws ReflectiveOperationException {
          assertWithMessage("Constructor is not private")
                  .that(isUtilsClassHasPrivateConstructor(ParserUtil.class))
                  .isTrue();
      }
  
      @Test
      public void testCreationOfFakeCommentBlock() {
          final DetailAST testCommentBlock =
              ParserUtil.createBlockCommentNode("test_comment");
          assertWithMessage("Invalid token type")
                  .that(testCommentBlock.getType())
                  .isEqualTo(TokenTypes.BLOCK_COMMENT_BEGIN);
          assertWithMessage("Invalid text")
                  .that(testCommentBlock.getText())
                  .isEqualTo("/*");
          assertWithMessage("Invalid line number")
                  .that(testCommentBlock.getLineNo())
                  .isEqualTo(0);
  
          final DetailAST contentCommentBlock = testCommentBlock.getFirstChild();
          assertWithMessage("Invalid token type")
                  .that(contentCommentBlock.getType())
                  .isEqualTo(TokenTypes.COMMENT_CONTENT);
          assertWithMessage("Invalid text")
                  .that(contentCommentBlock.getText())
                  .isEqualTo("*test_comment");
          assertWithMessage("Invalid line number")
                  .that(contentCommentBlock.getLineNo())
                  .isEqualTo(0);
          assertWithMessage("Invalid column number")
                  .that(contentCommentBlock.getColumnNo())
                  .isEqualTo(-1);
  
          final DetailAST endCommentBlock = contentCommentBlock.getNextSibling();
          assertWithMessage("Invalid token type")
                  .that(endCommentBlock.getType())
                  .isEqualTo(TokenTypes.BLOCK_COMMENT_END);
          assertWithMessage("Invalid text")
                  .that(endCommentBlock.getText())
                  .isEqualTo("*/");
      }
  }
  