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.DesignForExtensionCheck.MSG_KEY;
  
  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 DesignForExtensionCheckTest
      extends AbstractModuleTestSupport {
  
      @Override
      protected String getPackageLocation() {
          return "com/puppycrawl/tools/checkstyle/checks/design/designforextension";
      }
  
      @Test
      public void testGetRequiredTokens() {
          final DesignForExtensionCheck checkObj = new DesignForExtensionCheck();
          final int[] expected = {TokenTypes.METHOD_DEF};
          assertWithMessage("Default required tokens are invalid")
              .that(checkObj.getRequiredTokens())
              .isEqualTo(expected);
      }
  
      @Test
      public void testIt() throws Exception {
          final String[] expected = {
              "50:5: " + getCheckMessage(MSG_KEY, "InputDesignForExtension", "doh"),
              "104:9: " + getCheckMessage(MSG_KEY, "anotherNonFinalClass", "someMethod"),
          };
          verifyWithInlineConfigParser(
                  getPath("InputDesignForExtension.java"), expected);
      }
  
      @Test
      public void testGetAcceptableTokens() {
          final DesignForExtensionCheck obj = new DesignForExtensionCheck();
          final int[] expected = {TokenTypes.METHOD_DEF};
          assertWithMessage("Default acceptable tokens are invalid")
              .that(obj.getAcceptableTokens())
              .isEqualTo(expected);
      }
  
      @Test
      public void testOverridableMethods() throws Exception {
          final String[] expected = {
              "14:9: " + getCheckMessage(MSG_KEY, "A", "foo1"),
              "38:9: " + getCheckMessage(MSG_KEY, "A", "foo8"),
              "43:9: " + getCheckMessage(MSG_KEY, "A", "foo9"),
              "50:9: " + getCheckMessage(MSG_KEY, "A", "foo10"),
              "57:9: " + getCheckMessage(MSG_KEY, "A", "foo11"),
              "62:9: " + getCheckMessage(MSG_KEY, "A", "foo12"),
              "69:9: " + getCheckMessage(MSG_KEY, "A", "foo13"),
              "76:9: " + getCheckMessage(MSG_KEY, "A", "foo14"),
              "98:9: " + getCheckMessage(MSG_KEY, "A", "foo22"),
              "104:9: " + getCheckMessage(MSG_KEY, "A", "foo23"),
              "113:9: " + getCheckMessage(MSG_KEY, "A", "foo25"),
              "118:9: " + getCheckMessage(MSG_KEY, "A", "foo26"),
              "125:9: " + getCheckMessage(MSG_KEY, "A", "foo27"),
              "137:9: " + getCheckMessage(MSG_KEY, "A", "foo29"),
              "159:9: " + getCheckMessage(MSG_KEY, "A", "foo31"),
              "170:9: " + getCheckMessage(MSG_KEY, "A", "foo33"),
              "176:9: " + getCheckMessage(MSG_KEY, "A", "foo34"),
              "198:9: " + getCheckMessage(MSG_KEY, "A", "foo39"),
              "205:9: " + getCheckMessage(MSG_KEY, "A", "foo41"),
          };
          verifyWithInlineConfigParser(
                  getPath("InputDesignForExtensionOverridableMethods.java"), expected);
      }
  
      @Test
      public void testIgnoredAnnotationsOption() throws Exception {
          final String[] expected = {
              "39:5: "
                  + getCheckMessage(MSG_KEY, "InputDesignForExtensionIgnoredAnnotations", "foo1"),
              "149:5: "
                  + getCheckMessage(MSG_KEY, "InputDesignForExtensionIgnoredAnnotations", "foo21"),
              "154:5: "
                  + getCheckMessage(MSG_KEY, "InputDesignForExtensionIgnoredAnnotations", "setAge"),
              "169:5: "
                  + getCheckMessage(MSG_KEY, "InputDesignForExtensionIgnoredAnnotations", "foo24"),
              "176:5: "
                  + getCheckMessage(MSG_KEY, "InputDesignForExtensionIgnoredAnnotations", "dontUse4"),
          };
          verifyWithInlineConfigParser(
                  getPath("InputDesignForExtensionIgnoredAnnotations.java"), expected);
      }
  
      @Test
      public void testIgnoreAnnotationsOptionWithMultipleAnnotations() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getPath("InputDesignForExtensionMultipleAnnotations.java"), expected);
      }
  
      @Test
      public void testNativeMethods() throws Exception {
          final String[] expected = {
              "16:5: " + getCheckMessage(MSG_KEY, "InputDesignForExtensionNativeMethods", "foo1"),
              "32:5: " + getCheckMessage(MSG_KEY, "InputDesignForExtensionNativeMethods", "foo6"),
          };
          verifyWithInlineConfigParser(
                  getPath("InputDesignForExtensionNativeMethods.java"), expected);
      }
  
      @Test
      public void testDesignForExtensionRecords() throws Exception {
  
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
  
          verifyWithInlineConfigParser(
                  getNonCompilablePath("InputDesignForExtensionRecords.java"), expected);
      }
  
      @Test
      public void testRequiredJavadocPhrase() throws Exception {
          final String className = "InputDesignForExtensionRequiredJavadocPhrase";
          final String[] expected = {
              "41:5: " + getCheckMessage(MSG_KEY, className, "foo5"),
              "48:5: " + getCheckMessage(MSG_KEY, className, "foo8"),
              "51:5: " + getCheckMessage(MSG_KEY, className, "foo9"),
              "67:5: " + getCheckMessage(MSG_KEY, className, "foo12"),
          };
          verifyWithInlineConfigParser(
                  getPath("InputDesignForExtensionRequiredJavadocPhrase.java"), expected);
      }
  
      @Test
      public void testRequiredJavadocPhraseMultiLine() throws Exception {
          final String className = "InputDesignForExtensionRequiredJavadocPhraseMultiLine";
          final String[] expected = {
              "23:5: " + getCheckMessage(MSG_KEY, className, "foo2"),
          };
          verifyWithInlineConfigParser(
                  getPath("InputDesignForExtensionRequiredJavadocPhraseMultiLine.java"),
              expected);
      }
  
      @Test
      public void testInterfaceMemberScopeIsPublic() throws Exception {
          final String[] expected = {
              "15:9: " + getCheckMessage(MSG_KEY, "Inner", "getProperty"),
          };
          verifyWithInlineConfigParser(
                  getPath("InputDesignForExtensionInterfaceMemberScopeIsPublic.java"),
              expected);
      }
  
  }
  