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.ThrowsCountCheck.MSG_KEY;
  
  import org.antlr.v4.runtime.CommonToken;
  import org.junit.jupiter.api.Test;
  
  import com.puppycrawl.tools.checkstyle.AbstractModuleTestSupport;
  import com.puppycrawl.tools.checkstyle.DetailAstImpl;
  import com.puppycrawl.tools.checkstyle.api.TokenTypes;
  
  public class ThrowsCountCheckTest extends AbstractModuleTestSupport {
  
      @Override
      protected String getPackageLocation() {
          return "com/puppycrawl/tools/checkstyle/checks/design/throwscount";
      }
  
      @Test
      public void testDefault() throws Exception {
  
          final String[] expected = {
              "25:20: " + getCheckMessage(MSG_KEY, 5, 4),
              "30:20: " + getCheckMessage(MSG_KEY, 5, 4),
              "35:20: " + getCheckMessage(MSG_KEY, 6, 4),
              "63:43: " + getCheckMessage(MSG_KEY, 5, 4),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputThrowsCount.java"), expected);
      }
  
      @Test
      public void testMax() throws Exception {
  
          final String[] expected = {
              "35:20: " + getCheckMessage(MSG_KEY, 6, 5),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputThrowsCount2.java"), expected);
      }
  
      @Test
      public void testGetAcceptableTokens() {
          final ThrowsCountCheck obj = new ThrowsCountCheck();
          final int[] expected = {TokenTypes.LITERAL_THROWS};
          assertWithMessage("Default acceptable tokens are invalid")
              .that(obj.getAcceptableTokens())
              .isEqualTo(expected);
      }
  
      @Test
      public void testGetRequiredTokens() {
          final ThrowsCountCheck obj = new ThrowsCountCheck();
          final int[] expected = {TokenTypes.LITERAL_THROWS};
          assertWithMessage("Default required tokens are invalid")
              .that(obj.getRequiredTokens())
              .isEqualTo(expected);
      }
  
      @Test
      public void testWrongTokenType() {
          final ThrowsCountCheck obj = new ThrowsCountCheck();
          final DetailAstImpl ast = new DetailAstImpl();
          ast.initialize(new CommonToken(TokenTypes.CLASS_DEF, "class"));
          try {
              obj.visitToken(ast);
              assertWithMessage("IllegalStateException is expected").fail();
          }
          catch (IllegalStateException ex) {
              assertWithMessage("Invalid exception message")
                  .that(ex.getMessage())
                  .isEqualTo(ast.toString());
          }
      }
  
      @Test
      public void testNotIgnorePrivateMethod() throws Exception {
          final String[] expected = {
              "25:20: " + getCheckMessage(MSG_KEY, 5, 4),
              "30:20: " + getCheckMessage(MSG_KEY, 5, 4),
              "35:20: " + getCheckMessage(MSG_KEY, 6, 4),
              "43:28: " + getCheckMessage(MSG_KEY, 5, 4),
              "63:43: " + getCheckMessage(MSG_KEY, 5, 4),
          };
          verifyWithInlineConfigParser(
                  getPath("InputThrowsCount3.java"), expected);
      }
  
      @Test
      public void testMethodWithAnnotation() throws Exception {
          final String[] expected = {
              "26:26: " + getCheckMessage(MSG_KEY, 5, 4),
          };
          verifyWithInlineConfigParser(
                  getPath("InputThrowsCountMethodWithAnnotation.java"), expected);
      }
  
      @Test
      public void testOverriding() throws Exception {
          final String[] expected = {
              "17:20: " + getCheckMessage(MSG_KEY, 1, 0),
              "21:20: " + getCheckMessage(MSG_KEY, 1, 0),
              "25:20: " + getCheckMessage(MSG_KEY, 5, 0),
              "31:20: " + getCheckMessage(MSG_KEY, 5, 0),
              "37:20: " + getCheckMessage(MSG_KEY, 6, 0),
              "46:28: " + getCheckMessage(MSG_KEY, 5, 0),
              "67:43: " + getCheckMessage(MSG_KEY, 5, 0),
          };
          verifyWithInlineConfigParser(
                  getPath("InputThrowsCount4.java"), expected);
      }
  
  }
  