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.design;
  
  import static com.google.common.truth.Truth.assertWithMessage;
  import static com.puppycrawl.tools.checkstyle.checks.design.InnerTypeLastCheck.MSG_KEY;
  
  import java.io.File;
  
  import org.junit.jupiter.api.Test;
  
  import com.puppycrawl.tools.checkstyle.AbstractModuleTestSupport;
  import com.puppycrawl.tools.checkstyle.DefaultConfiguration;
  import com.puppycrawl.tools.checkstyle.api.TokenTypes;
  import com.puppycrawl.tools.checkstyle.utils.CommonUtil;
  
  public class InnerTypeLastCheckTest extends AbstractModuleTestSupport {
  
      @Override
      protected String getPackageLocation() {
          return "com/puppycrawl/tools/checkstyle/checks/design/innertypelast";
      }
  
      @Test
      public void testGetRequiredTokens() {
          final InnerTypeLastCheck checkObj = new InnerTypeLastCheck();
          final int[] expected = {
              TokenTypes.CLASS_DEF,
              TokenTypes.INTERFACE_DEF,
              TokenTypes.RECORD_DEF,
          };
          assertWithMessage("Default required tokens are invalid")
              .that(checkObj.getRequiredTokens())
              .isEqualTo(expected);
      }
  
      @Test
      public void testMembersBeforeInner() throws Exception {
          final String[] expected = {
              "50:9: " + getCheckMessage(MSG_KEY),
              "71:9: " + getCheckMessage(MSG_KEY),
              "75:9: " + getCheckMessage(MSG_KEY),
              "84:5: " + getCheckMessage(MSG_KEY),
              "101:9: " + getCheckMessage(MSG_KEY),
          };
          verifyWithInlineConfigParser(
                  getPath("InputInnerTypeLastClass.java"), expected);
      }
  
      @Test
      public void testIfRootClassChecked() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getPath("InputInnerTypeLastClassRootClass.java"), expected);
      }
  
      @Test
      public void testIfRootClassChecked2() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getPath("InputInnerTypeLastClassRootClass2.java"), expected);
      }
  
      @Test
      public void testIfRootClassChecked3() throws Exception {
          final DefaultConfiguration checkConfig =
              createModuleConfig(InnerTypeLastCheck.class);
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verify(createChecker(checkConfig), new File[] {
              new File(getPath("InputInnerTypeLastClassRootClass.java")),
              new File(getPath("InputInnerTypeLastClassRootClass.java")),
          }, "InputInnerTypeLastClassRootClass.java", expected);
      }
  
      @Test
      public void testInnerTypeBeforeCtor() throws Exception {
          final String[] expected = {
              "13:5: " + getCheckMessage(MSG_KEY),
              "22:5: " + getCheckMessage(MSG_KEY),
              "31:5: " + getCheckMessage(MSG_KEY),
          };
          verifyWithInlineConfigParser(
                  getPath("InputInnerTypeLastClassCtorsInitBlocks.java"), expected);
      }
  
      @Test
      public void testInnerTypeLastRecords() throws Exception {
  
          final String[] expected = {
              "17:9: " + getCheckMessage(MSG_KEY),
              "21:5: " + getCheckMessage(MSG_KEY),
              "30:9: " + getCheckMessage(MSG_KEY),
              "40:13: " + getCheckMessage(MSG_KEY),
              "46:13: " + getCheckMessage(MSG_KEY),
              "50:9: " + getCheckMessage(MSG_KEY),
              "52:9: " + getCheckMessage(MSG_KEY),
          };
          verifyWithInlineConfigParser(
                  getNonCompilablePath("InputInnerTypeLastRecords.java"), expected);
      }
  
      @Test
      public void testInnerTypeLastCstyleArray() throws Exception {
          final String[] expected = {
              "11:5: " + getCheckMessage(MSG_KEY),
              "12:5: " + getCheckMessage(MSG_KEY),
              "13:5: " + getCheckMessage(MSG_KEY),
              "14:5: " + getCheckMessage(MSG_KEY),
          };
          verifyWithInlineConfigParser(
                  getPath("InputInnerTypeLastArray.java"), expected);
      }
  
      @Test
      public void testGetAcceptableTokens() {
          final InnerTypeLastCheck obj = new InnerTypeLastCheck();
          final int[] expected = {
              TokenTypes.CLASS_DEF,
              TokenTypes.INTERFACE_DEF,
              TokenTypes.RECORD_DEF,
          };
          assertWithMessage("Default acceptable tokens are invalid")
              .that(obj.getAcceptableTokens())
              .isEqualTo(expected);
      }
  
  }
  