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.UncommentedMainCheck.MSG_KEY;
  
  import java.io.File;
  import java.util.List;
  
  import org.antlr.v4.runtime.CommonToken;
  import org.junit.jupiter.api.Test;
  
  import com.google.common.collect.ImmutableMap;
  import com.puppycrawl.tools.checkstyle.AbstractModuleTestSupport;
  import com.puppycrawl.tools.checkstyle.DefaultConfiguration;
  import com.puppycrawl.tools.checkstyle.DetailAstImpl;
  import com.puppycrawl.tools.checkstyle.api.TokenTypes;
  import com.puppycrawl.tools.checkstyle.utils.CommonUtil;
  
  public class UncommentedMainCheckTest
      extends AbstractModuleTestSupport {
  
      @Override
      protected String getPackageLocation() {
          return "com/puppycrawl/tools/checkstyle/checks/uncommentedmain";
      }
  
      @Test
      public void testDefaults()
              throws Exception {
          final String[] expected = {
              "17:5: " + getCheckMessage(MSG_KEY),
              "26:5: " + getCheckMessage(MSG_KEY),
              "35:5: " + getCheckMessage(MSG_KEY),
              "99:5: " + getCheckMessage(MSG_KEY),
          };
          verifyWithInlineConfigParser(
                  getPath("InputUncommentedMain.java"), expected);
      }
  
      @Test
      public void testExcludedClasses()
              throws Exception {
          final String[] expected = {
              "17:5: " + getCheckMessage(MSG_KEY),
              "35:5: " + getCheckMessage(MSG_KEY),
              "99:5: " + getCheckMessage(MSG_KEY),
          };
          verifyWithInlineConfigParser(
                  getPath("InputUncommentedMain6.java"), expected);
      }
  
      @Test
      public void testTokens() {
          final UncommentedMainCheck check = new UncommentedMainCheck();
          assertWithMessage("Required tokens should not be null")
              .that(check.getRequiredTokens())
              .isNotNull();
          assertWithMessage("Acceptable tokens should not be null")
              .that(check.getAcceptableTokens())
              .isNotNull();
          assertWithMessage("Invalid default tokens")
              .that(check.getAcceptableTokens())
              .isEqualTo(check.getDefaultTokens());
          assertWithMessage("Invalid acceptable tokens")
              .that(check.getRequiredTokens())
              .isEqualTo(check.getDefaultTokens());
      }
  
      @Test
      public void testDeepDepth() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getPath("InputUncommentedMain2.java"), expected);
      }
  
      @Test
      public void testVisitPackage() throws Exception {
          final String[] expected = {
              "21:5: " + getCheckMessage(MSG_KEY),
          };
          verifyWithInlineConfigParser(
                  getPath("InputUncommentedMain5.java"), expected);
      }
  
      @Test
      public void testWrongName() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getPath("InputUncommentedMain3.java"), expected);
      }
  
      @Test
      public void testWrongArrayType() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getPath("InputUncommentedMain4.java"), expected);
      }
  
      @Test
      public void testIllegalStateException() {
          final UncommentedMainCheck check = new UncommentedMainCheck();
          final DetailAstImpl ast = new DetailAstImpl();
          ast.initialize(new CommonToken(TokenTypes.CTOR_DEF, "ctor"));
          try {
              check.visitToken(ast);
              assertWithMessage("IllegalStateException is expected").fail();
          }
          catch (IllegalStateException ex) {
              assertWithMessage("Error message is unexpected")
                  .that(ex.getMessage())
                  .isEqualTo(ast.toString());
          }
      }
  
      @Test
      public void testRecords()
              throws Exception {
  
          final String[] expected = {
              "12:5: " + getCheckMessage(MSG_KEY),
              "20:9: " + getCheckMessage(MSG_KEY),
              "25:13: " + getCheckMessage(MSG_KEY),
          };
  
          verifyWithInlineConfigParser(
                  getNonCompilablePath(
                  "InputUncommentedMainRecords.java"), expected);
      }
  
      @Test
      public void testStateIsClearedOnBeginTree() throws Exception {
          final DefaultConfiguration checkConfig = createModuleConfig(UncommentedMainCheck.class);
          final String file1 = getNonCompilablePath(
                  "InputUncommentedMainRecords2.java");
          final String file2 = getNonCompilablePath(
                  "InputUncommentedMainBeginTree2.java");
          final List<String> expectedFirstInput = List.of(
                  "12:5: " + getCheckMessage(MSG_KEY),
                  "21:24: " + getCheckMessage(MSG_KEY)
          );
          final List<String> expectedSecondInput = List.of(
                  "13:13: " + getCheckMessage(MSG_KEY)
          );
          final File[] inputs = {new File(file1), new File(file2)};
  
          verify(createChecker(checkConfig), inputs, ImmutableMap.of(
              file1, expectedFirstInput,
              file2, expectedSecondInput));
      }
  
      @Test
      public void testStateIsClearedOnBeginTree2() throws Exception {
          final DefaultConfiguration checkConfig = createModuleConfig(UncommentedMainCheck.class);
          checkConfig.addProperty("excludedClasses",
                  "uncommentedmain\\.InputUncommentedMainBeginTreePackage2");
          final String file1 = getPath(
                  "InputUncommentedMainBeginTreePackage1.java");
          final String file2 = getPath(
                  "InputUncommentedMainBeginTreePackage2.java");
          final List<String> expectedFirstInput = List.of(CommonUtil.EMPTY_STRING_ARRAY);
          final List<String> expectedSecondInput = List.of(
                  "3:5: " + getCheckMessage(MSG_KEY),
                  "12:5: " + getCheckMessage(MSG_KEY)
          );
          final File[] inputs = {new File(file1), new File(file2)};
  
          verify(createChecker(checkConfig), inputs, ImmutableMap.of(
              file1, expectedFirstInput,
              file2, expectedSecondInput));
      }
  }
  