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.naming;
  
  import static com.google.common.truth.Truth.assertWithMessage;
  import static com.puppycrawl.tools.checkstyle.checks.naming.AbstractNameCheck.MSG_INVALID_PATTERN;
  
  import org.junit.jupiter.api.Test;
  
  import com.puppycrawl.tools.checkstyle.AbstractModuleTestSupport;
  import com.puppycrawl.tools.checkstyle.api.TokenTypes;
  import com.puppycrawl.tools.checkstyle.internal.utils.TestUtil;
  import com.puppycrawl.tools.checkstyle.utils.CommonUtil;
  
  public class ParameterNameCheckTest
      extends AbstractModuleTestSupport {
  
      @Override
      protected String getPackageLocation() {
          return "com/puppycrawl/tools/checkstyle/checks/naming/parametername";
      }
  
      @Test
      public void testGetRequiredTokens() {
          final ParameterNameCheck checkObj = new ParameterNameCheck();
          final int[] expected = {TokenTypes.PARAMETER_DEF};
          assertWithMessage("Default required tokens are invalid")
                  .that(checkObj.getRequiredTokens())
                  .isEqualTo(expected);
      }
  
      @Test
      public void testCatch()
              throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getPath("InputParameterNameCatchOnly.java"), expected);
      }
  
      @Test
      public void testSpecified()
              throws Exception {
  
          final String pattern = "^a[A-Z][a-zA-Z0-9]*$";
  
          final String[] expected = {
              "68:19: " + getCheckMessage(MSG_INVALID_PATTERN, "badFormat1", pattern),
              "68:34: " + getCheckMessage(MSG_INVALID_PATTERN, "badFormat2", pattern),
              "69:25: " + getCheckMessage(MSG_INVALID_PATTERN, "badFormat3", pattern),
          };
          verifyWithInlineConfigParser(
                  getPath("InputParameterNameOne.java"), expected);
      }
  
      @Test
      public void testWhitespaceInAccessModifierProperty() throws Exception {
          final String pattern = "^h$";
          final String[] expected = {
              "14:69: " + getCheckMessage(MSG_INVALID_PATTERN, "parameter1", pattern),
              "18:31: " + getCheckMessage(MSG_INVALID_PATTERN, "parameter2", pattern),
          };
          verifyWithInlineConfigParser(
                  getPath("InputParameterNameWhitespaceInAccessModifierProperty.java"), expected);
      }
  
      @Test
      public void testDefault()
              throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getPath("InputParameterName.java"), expected);
      }
  
      @Test
      public void testGetAcceptableTokens() {
          final ParameterNameCheck parameterNameCheckObj = new ParameterNameCheck();
          final int[] actual = parameterNameCheckObj.getAcceptableTokens();
          final int[] expected = {
              TokenTypes.PARAMETER_DEF,
          };
          assertWithMessage("Default acceptable tokens are invalid")
                  .that(actual)
                  .isEqualTo(expected);
      }
  
      @Test
      public void testSkipMethodsWithOverrideAnnotationTrue()
              throws Exception {
  
          final String pattern = "^h$";
  
          final String[] expected = {
              "20:28: " + getCheckMessage(MSG_INVALID_PATTERN, "object", pattern),
              "24:30: " + getCheckMessage(MSG_INVALID_PATTERN, "aaaa", pattern),
              "28:19: " + getCheckMessage(MSG_INVALID_PATTERN, "abc", pattern),
              "28:28: " + getCheckMessage(MSG_INVALID_PATTERN, "bd", pattern),
              "30:18: " + getCheckMessage(MSG_INVALID_PATTERN, "abc", pattern),
              "37:46: " + getCheckMessage(MSG_INVALID_PATTERN, "fie", pattern),
              "37:73: " + getCheckMessage(MSG_INVALID_PATTERN, "pkgNames", pattern),
              };
          verifyWithInlineConfigParser(
                  getPath("InputParameterNameOverrideAnnotation.java"), expected);
      }
  
      @Test
      public void testSkipMethodsWithOverrideAnnotationFalse()
              throws Exception {
  
          final String pattern = "^h$";
  
          final String[] expected = {
              "15:34: " + getCheckMessage(MSG_INVALID_PATTERN, "o", pattern),
              "20:28: " + getCheckMessage(MSG_INVALID_PATTERN, "object", pattern),
              "24:30: " + getCheckMessage(MSG_INVALID_PATTERN, "aaaa", pattern),
              "28:19: " + getCheckMessage(MSG_INVALID_PATTERN, "abc", pattern),
              "28:28: " + getCheckMessage(MSG_INVALID_PATTERN, "bd", pattern),
              "30:18: " + getCheckMessage(MSG_INVALID_PATTERN, "abc", pattern),
              "37:49: " + getCheckMessage(MSG_INVALID_PATTERN, "fie", pattern),
              "37:76: " + getCheckMessage(MSG_INVALID_PATTERN, "pkgNames", pattern),
              };
          verifyWithInlineConfigParser(
                  getPath("InputParameterNameOverrideAnnotationOne.java"), expected);
      }
  
      @Test
      public void testPublicAccessModifier()
              throws Exception {
  
          final String pattern = "^h$";
  
          final String[] expected = {
              "14:49: " + getCheckMessage(MSG_INVALID_PATTERN, "pubconstr", pattern),
              "18:31: " + getCheckMessage(MSG_INVALID_PATTERN, "inner", pattern),
              "28:24: " + getCheckMessage(MSG_INVALID_PATTERN, "pubpub", pattern),
              "39:21: " + getCheckMessage(MSG_INVALID_PATTERN, "pubifc", pattern),
              "53:24: " + getCheckMessage(MSG_INVALID_PATTERN, "packpub", pattern),
              "69:21: " + getCheckMessage(MSG_INVALID_PATTERN, "packifc", pattern),
              };
          verifyWithInlineConfigParser(
                  getPath("InputParameterNameAccessModifier.java"), expected);
      }
  
      @Test
      public void testIsOverriddenNoNullPointerException()
              throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getPath("InputParameterNameOverrideAnnotationNoNPE.java"), expected);
      }
  
      @Test
      public void testReceiverParameter() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getPath("InputParameterNameReceiver.java"), expected);
      }
  
      @Test
      public void testLambdaParameterNoViolationAtAll() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getPath("InputParameterNameLambda.java"), expected);
      }
  
      @Test
      public void testWhitespaceInConfig() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getPath("InputParameterNameWhitespaceInConfig.java"), expected);
      }
  
      @Test
      public void testSetAccessModifiers() throws Exception {
          final AccessModifierOption[] input = {
              AccessModifierOption.PACKAGE,
          };
          final ParameterNameCheck check = new ParameterNameCheck();
          check.setAccessModifiers(input);
  
          assertWithMessage("check creates its own instance of access modifier array")
              .that(System.identityHashCode(
                  TestUtil.getClassDeclaredField(ParameterNameCheck.class, "accessModifiers")
                          .get(check)))
              .isNotEqualTo(System.identityHashCode(input));
      }
  
  }
  