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;
  
  import static com.google.common.truth.Truth.assertWithMessage;
  import static com.puppycrawl.tools.checkstyle.checks.NoCodeInFileCheck.MSG_KEY_NO_CODE;
  
  import org.junit.jupiter.api.Test;
  
  import com.puppycrawl.tools.checkstyle.AbstractModuleTestSupport;
  import com.puppycrawl.tools.checkstyle.DefaultConfiguration;
  import com.puppycrawl.tools.checkstyle.utils.CommonUtil;
  
  public class NoCodeInFileCheckTest extends AbstractModuleTestSupport {
  
      @Override
      protected String getPackageLocation() {
          return "com/puppycrawl/tools/checkstyle/checks/nocodeinfile";
      }
  
      @Test
      public void testGetRequiredTokens() {
          final NoCodeInFileCheck checkObj = new NoCodeInFileCheck();
          assertWithMessage("Required tokens array is not empty")
                  .that(checkObj.getRequiredTokens())
                  .isEmpty();
      }
  
      @Test
      public void testGetAcceptableTokens() {
          final NoCodeInFileCheck checkObj = new NoCodeInFileCheck();
          assertWithMessage("Acceptable tokens array is not empty")
                  .that(checkObj.getAcceptableTokens())
                  .isEmpty();
      }
  
      @Test
      public void testBlank() throws Exception {
          final DefaultConfiguration checkConfig = createModuleConfig(NoCodeInFileCheck.class);
          final String[] expected = {
              "1: " + getCheckMessage(MSG_KEY_NO_CODE),
          };
          verify(checkConfig, getPath("InputNoCodeInFile1.java"), expected);
      }
  
      @Test
      public void testSingleLineComment() throws Exception {
          final DefaultConfiguration checkConfig = createModuleConfig(NoCodeInFileCheck.class);
          final String[] expected = {
              "1: " + getCheckMessage(MSG_KEY_NO_CODE),
          };
          verify(checkConfig, getPath("InputNoCodeInFile2.java"), expected);
      }
  
      @Test
      public void testMultiLineComment() throws Exception {
          final String[] expected = {
              "1: " + getCheckMessage(MSG_KEY_NO_CODE),
          };
          verifyWithInlineConfigParser(
                  getPath("InputNoCodeInFile3.java"), expected);
      }
  
      @Test
      public void testFileContainingCode() throws Exception {
          verifyWithInlineConfigParser(
                  getPath("InputNoCodeInFile4.java"),
                  CommonUtil.EMPTY_STRING_ARRAY);
      }
  
      @Test
      public void testBothSingleLineAndMultiLineComment() throws Exception {
          final String[] expected = {
              "1: " + getCheckMessage(MSG_KEY_NO_CODE),
          };
          verifyWithInlineConfigParser(
                  getPath("InputNoCodeInFile5.java"), expected);
      }
  }
  