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.sizes;
  
  import static com.google.common.truth.Truth.assertWithMessage;
  import static com.puppycrawl.tools.checkstyle.checks.sizes.ParameterNumberCheck.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 ParameterNumberCheckTest
      extends AbstractModuleTestSupport {
  
      @Override
      protected String getPackageLocation() {
          return "com/puppycrawl/tools/checkstyle/checks/sizes/parameternumber";
      }
  
      @Test
      public void testGetRequiredTokens() {
          final ParameterNumberCheck checkObj = new ParameterNumberCheck();
          assertWithMessage("ParameterNumberCheck#getRequiredTokens should return empty array "
                  + "by default")
              .that(checkObj.getRequiredTokens())
              .isEqualTo(CommonUtil.EMPTY_INT_ARRAY);
      }
  
      @Test
      public void testGetAcceptableTokens() {
          final ParameterNumberCheck paramNumberCheckObj =
              new ParameterNumberCheck();
          final int[] actual = paramNumberCheckObj.getAcceptableTokens();
          final int[] expected = {
              TokenTypes.METHOD_DEF,
              TokenTypes.CTOR_DEF,
          };
  
          assertWithMessage("Default acceptable tokens are invalid")
              .that(actual)
              .isEqualTo(expected);
      }
  
      @Test
      public void testDefault()
              throws Exception {
          final String[] expected = {
              "198:10: " + getCheckMessage(MSG_KEY, 7, 9),
          };
          verifyWithInlineConfigParser(
                  getPath("InputParameterNumberSimple.java"), expected);
      }
  
      @Test
      public void testNum()
              throws Exception {
          final String[] expected = {
              "75:9: " + getCheckMessage(MSG_KEY, 2, 3),
              "198:10: " + getCheckMessage(MSG_KEY, 2, 9),
          };
          verifyWithInlineConfigParser(
                  getPath("InputParameterNumberSimple2.java"), expected);
      }
  
      @Test
      public void testMaxParam()
              throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getPath("InputParameterNumberSimple3.java"), expected);
      }
  
      @Test
      public void shouldLogActualParameterNumber()
              throws Exception {
          final String[] expected = {
              "199:10: 7,9",
          };
          verifyWithInlineConfigParser(
                  getPath("InputParameterNumberSimple4.java"), expected);
      }
  
      @Test
      public void testIgnoreOverriddenMethods()
              throws Exception {
          final String[] expected = {
              "15:10: " + getCheckMessage(MSG_KEY, 7, 8),
              "20:10: " + getCheckMessage(MSG_KEY, 7, 8),
          };
          verifyWithInlineConfigParser(
                  getPath("InputParameterNumber.java"), expected);
      }
  
      @Test
      public void testIgnoreOverriddenMethodsFalse()
              throws Exception {
          final String[] expected = {
              "15:10: " + getCheckMessage(MSG_KEY, 7, 8),
              "20:10: " + getCheckMessage(MSG_KEY, 7, 8),
              "28:10: " + getCheckMessage(MSG_KEY, 7, 8),
              "33:10: " + getCheckMessage(MSG_KEY, 7, 8),
          };
          verifyWithInlineConfigParser(
                  getPath("InputParameterNumber2.java"), expected);
      }
  
  }
  