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.modifier;
  
  import static com.google.common.truth.Truth.assertWithMessage;
  import static com.puppycrawl.tools.checkstyle.checks.modifier.ModifierOrderCheck.MSG_ANNOTATION_ORDER;
  import static com.puppycrawl.tools.checkstyle.checks.modifier.ModifierOrderCheck.MSG_MODIFIER_ORDER;
  
  import org.junit.jupiter.api.Test;
  
  import com.puppycrawl.tools.checkstyle.AbstractModuleTestSupport;
  import com.puppycrawl.tools.checkstyle.api.TokenTypes;
  import com.puppycrawl.tools.checkstyle.utils.CommonUtil;
  
  public class ModifierOrderCheckTest
      extends AbstractModuleTestSupport {
  
      @Override
      protected String getPackageLocation() {
          return "com/puppycrawl/tools/checkstyle/checks/modifier/modifierorder";
      }
  
      @Test
      public void testGetRequiredTokens() {
          final ModifierOrderCheck checkObj = new ModifierOrderCheck();
          final int[] expected = {TokenTypes.MODIFIERS};
          assertWithMessage("Default required tokens are invalid")
              .that(checkObj.getRequiredTokens())
              .isEqualTo(expected);
      }
  
      @Test
      public void testIt() throws Exception {
          final String[] expected = {
              "15:10: " + getCheckMessage(MSG_MODIFIER_ORDER, "final"),
              "19:12: " + getCheckMessage(MSG_MODIFIER_ORDER, "private"),
              "25:14: " + getCheckMessage(MSG_MODIFIER_ORDER, "private"),
              "35:13: " + getCheckMessage(MSG_ANNOTATION_ORDER, "@MyAnnotation2"),
              "40:13: " + getCheckMessage(MSG_ANNOTATION_ORDER, "@MyAnnotation2"),
              "50:35: " + getCheckMessage(MSG_ANNOTATION_ORDER, "@MyAnnotation4"),
              "158:14: " + getCheckMessage(MSG_MODIFIER_ORDER, "default"),
          };
          verifyWithInlineConfigParser(
                  getPath("InputModifierOrderIt.java"), expected);
      }
  
      @Test
      public void testDefaultMethods()
              throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getPath("InputModifierOrderDefaultMethods.java"), expected);
      }
  
      @Test
      public void testGetDefaultTokens() {
          final ModifierOrderCheck modifierOrderCheckObj = new ModifierOrderCheck();
          final int[] actual = modifierOrderCheckObj.getDefaultTokens();
          final int[] expected = {TokenTypes.MODIFIERS};
          final int[] unexpectedArray = {
              TokenTypes.MODIFIERS,
              TokenTypes.OBJBLOCK,
          };
          assertWithMessage("Default tokens are invalid")
              .that(actual)
              .isEqualTo(expected);
          final int[] unexpectedEmptyArray = CommonUtil.EMPTY_INT_ARRAY;
          assertWithMessage("Default tokens should not be empty array")
              .that(actual)
              .isNotEqualTo(unexpectedEmptyArray);
          assertWithMessage("Invalid default tokens")
              .that(actual)
              .isNotEqualTo(unexpectedArray);
          assertWithMessage("Default tokens should not be null")
              .that(actual)
              .isNotNull();
      }
  
      @Test
      public void testGetAcceptableTokens() {
          final ModifierOrderCheck modifierOrderCheckObj = new ModifierOrderCheck();
          final int[] actual = modifierOrderCheckObj.getAcceptableTokens();
          final int[] expected = {TokenTypes.MODIFIERS};
          final int[] unexpectedArray = {
              TokenTypes.MODIFIERS,
              TokenTypes.OBJBLOCK,
          };
          assertWithMessage("Default acceptable tokens are invalid")
              .that(actual)
              .isEqualTo(expected);
          final int[] unexpectedEmptyArray = CommonUtil.EMPTY_INT_ARRAY;
          assertWithMessage("Default tokens should not be empty array")
              .that(actual)
              .isNotEqualTo(unexpectedEmptyArray);
          assertWithMessage("Invalid acceptable tokens")
              .that(actual)
              .isNotEqualTo(unexpectedArray);
          assertWithMessage("Acceptable tokens should not be null")
              .that(actual)
              .isNotNull();
      }
  
      @Test
      public void testSkipTypeAnnotations() throws Exception {
          final String[] expected = {
              "110:13: " + getCheckMessage(MSG_ANNOTATION_ORDER, "@MethodAnnotation"),
          };
          verifyWithInlineConfigParser(
                  getPath("InputModifierOrderTypeAnnotations.java"),
              expected);
      }
  
      @Test
      public void testAnnotationOnAnnotationDeclaration() throws Exception {
          final String[] expected = {
              "9:8: " + getCheckMessage(MSG_ANNOTATION_ORDER, "@InterfaceAnnotation"),
          };
          verifyWithInlineConfigParser(
                  getPath("InputModifierOrderAnnotationDeclaration.java"), expected);
      }
  
      @Test
      public void testModifierOrderSealedAndNonSealed() throws Exception {
          final String[] expected = {
              "10:8: " + getCheckMessage(MSG_MODIFIER_ORDER, "public"),
              "26:12: " + getCheckMessage(MSG_MODIFIER_ORDER, "private"),
              "44:10: " + getCheckMessage(MSG_MODIFIER_ORDER, "sealed"),
              "50:11: " + getCheckMessage(MSG_MODIFIER_ORDER, "public"),
              "53:14: " + getCheckMessage(MSG_MODIFIER_ORDER, "static"),
              "58:10: " + getCheckMessage(MSG_MODIFIER_ORDER, "non-sealed"),
          };
          verifyWithInlineConfigParser(
                  getNonCompilablePath("InputModifierOrderSealedAndNonSealed.java"), expected);
      }
  
      @Test
      public void testModifierOrderSealedAndNonSealedNoViolation() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getNonCompilablePath("InputModifierOrderSealedAndNonSealedNoViolation.java"),
                  expected);
      }
  
  }
  