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.coding;
  
  import static com.google.common.truth.Truth.assertWithMessage;
  import static com.puppycrawl.tools.checkstyle.checks.coding.IllegalThrowsCheck.MSG_KEY;
  
  import org.junit.jupiter.api.Test;
  
  import com.puppycrawl.tools.checkstyle.AbstractModuleTestSupport;
  import com.puppycrawl.tools.checkstyle.utils.CommonUtil;
  
  public class IllegalThrowsCheckTest extends AbstractModuleTestSupport {
  
      @Override
      protected String getPackageLocation() {
          return "com/puppycrawl/tools/checkstyle/checks/coding/illegalthrows";
      }
  
      @Test
      public void testDefault() throws Exception {
  
          final String[] expected = {
              "19:51: " + getCheckMessage(MSG_KEY, "RuntimeException"),
              "24:45: " + getCheckMessage(MSG_KEY, "java.lang.RuntimeException"),
              "25:22: " + getCheckMessage(MSG_KEY, "java.lang.Error"),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputIllegalThrowsTestDefault.java"), expected);
      }
  
      @Test
      public void testIllegalClassNames() throws Exception {
          // check that incorrect names don't break the Check
          final String[] expected = {
              "15:33: " + getCheckMessage(MSG_KEY, "NullPointerException"),
              "24:73: " + getCheckMessage(MSG_KEY, "java.lang.Error"),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputIllegalThrowsTestIllegalClassNames.java"), expected);
      }
  
      /**
       * Test to validate the IllegalThrowsCheck with ignoredMethodNames attribute.
       */
      @Test
      public void testIgnoreMethodNames() throws Exception {
  
          final String[] expected = {
              "19:51: " + getCheckMessage(MSG_KEY, "RuntimeException"),
              "28:35: " + getCheckMessage(MSG_KEY, "Throwable"),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputIllegalThrowsIgnoreMethodNames.java"), expected);
      }
  
      /**
       * Test to validate the IllegalThrowsCheck with both the attributes specified.
       */
      @Test
      public void testIllegalClassNamesWithIgnoreMethodNames() throws Exception {
          final String[] expected = {
              "14:33: " + getCheckMessage(MSG_KEY, "NullPointerException"),
              "27:35: " + getCheckMessage(MSG_KEY, "Throwable"),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputIllegalThrowsTestClassNames.java"), expected);
      }
  
      /**
       * Test to validate the IllegalThrowsCheck with <b>ignoreOverriddenMethods</b>
       * property.
       */
      @Test
      public void testIgnoreOverriddenMethods() throws Exception {
  
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
  
          verifyWithInlineConfigParser(
                  getPath("InputIllegalThrowsIgnoreOverriddenMethods.java"), expected);
      }
  
      /**
       * Test to validate the IllegalThrowsCheck without <b>ignoreOverriddenMethods</b>
       * property.
       */
      @Test
      public void testNotIgnoreOverriddenMethods() throws Exception {
  
          final String[] expected = {
              "17:36: " + getCheckMessage(MSG_KEY, "RuntimeException"),
              "22:51: " + getCheckMessage(MSG_KEY, "RuntimeException"),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputIllegalThrowsNotIgnoreOverriddenMethod.java"), expected);
      }
  
      @Test
      public void testTokensNotNull() {
          final IllegalThrowsCheck check = new IllegalThrowsCheck();
          assertWithMessage("Acceptable tokens should not be null")
              .that(check.getAcceptableTokens())
              .isNotNull();
          assertWithMessage("Default tokens should not be null")
              .that(check.getDefaultTokens())
              .isNotNull();
          assertWithMessage("Required tokens should not be null")
              .that(check.getRequiredTokens())
              .isNotNull();
      }
  
  }
  