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.MethodCountCheck.MSG_MANY_METHODS;
  import static com.puppycrawl.tools.checkstyle.checks.sizes.MethodCountCheck.MSG_PACKAGE_METHODS;
  import static com.puppycrawl.tools.checkstyle.checks.sizes.MethodCountCheck.MSG_PRIVATE_METHODS;
  import static com.puppycrawl.tools.checkstyle.checks.sizes.MethodCountCheck.MSG_PROTECTED_METHODS;
  import static com.puppycrawl.tools.checkstyle.checks.sizes.MethodCountCheck.MSG_PUBLIC_METHODS;
  
  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 MethodCountCheckTest extends AbstractModuleTestSupport {
  
      @Override
      protected String getPackageLocation() {
          return "com/puppycrawl/tools/checkstyle/checks/sizes/methodcount";
      }
  
      @Test
      public void testGetRequiredTokens() {
          final MethodCountCheck checkObj = new MethodCountCheck();
          final int[] expected = {TokenTypes.METHOD_DEF};
          assertWithMessage("Default required tokens are invalid")
              .that(checkObj.getRequiredTokens())
              .isEqualTo(expected);
      }
  
      @Test
      public void testGetAcceptableTokens() {
          final MethodCountCheck methodCountCheckObj =
              new MethodCountCheck();
          final int[] actual = methodCountCheckObj.getAcceptableTokens();
          final int[] expected = {
              TokenTypes.CLASS_DEF,
              TokenTypes.ENUM_CONSTANT_DEF,
              TokenTypes.ENUM_DEF,
              TokenTypes.INTERFACE_DEF,
              TokenTypes.ANNOTATION_DEF,
              TokenTypes.METHOD_DEF,
              TokenTypes.RECORD_DEF,
          };
  
          assertWithMessage("Default acceptable tokens are invalid")
              .that(actual)
              .isEqualTo(expected);
      }
  
      @Test
      public void testDefaults() throws Exception {
  
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
  
          verifyWithInlineConfigParser(
                  getPath("InputMethodCount.java"), expected);
      }
  
      @Test
      public void testThrees() throws Exception {
  
          final String[] expected = {
              "15:1: " + getCheckMessage(MSG_PACKAGE_METHODS, 5, 3),
              "15:1: " + getCheckMessage(MSG_PRIVATE_METHODS, 5, 3),
              "15:1: " + getCheckMessage(MSG_PROTECTED_METHODS, 5, 3),
              "15:1: " + getCheckMessage(MSG_PUBLIC_METHODS, 5, 3),
              "15:1: " + getCheckMessage(MSG_MANY_METHODS, 20, 3),
              "21:3: " + getCheckMessage(MSG_PUBLIC_METHODS, 5, 3),
              "21:3: " + getCheckMessage(MSG_MANY_METHODS, 5, 3),
              "57:3: " + getCheckMessage(MSG_PUBLIC_METHODS, 5, 3),
              "57:3: " + getCheckMessage(MSG_MANY_METHODS, 5, 3),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputMethodCount1.java"), expected);
      }
  
      @Test
      public void testEnum() throws Exception {
  
          final String[] expected = {
              "21:5: " + getCheckMessage(MSG_PRIVATE_METHODS, 1, 0),
              "21:5: " + getCheckMessage(MSG_MANY_METHODS, 3, 2),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputMethodCount2.java"), expected);
      }
  
      @Test
      public void testWithPackageModifier() throws Exception {
  
          final String[] expected = {
              "15:1: " + getCheckMessage(MSG_MANY_METHODS, 5, 2),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputMethodCount3.java"), expected);
      }
  
      @Test
      public void testOnInterfaceDefinitionWithField() throws Exception {
  
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
  
          verifyWithInlineConfigParser(
                  getPath("InputMethodCount4.java"), expected);
      }
  
      @Test
      public void testWithInterfaceDefinitionInClass() throws Exception {
  
          final String[] expected = {
              "15:1: " + getCheckMessage(MSG_MANY_METHODS, 2, 1),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputMethodCount5.java"), expected);
      }
  
      @Test
      public void testPartialTokens() throws Exception {
  
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
  
          verifyWithInlineConfigParser(
                  getPath("InputMethodCount6.java"), expected);
      }
  
      @Test
      public void testCountMethodToCorrectDefinition() throws Exception {
  
          final String[] expected = {
              "22:5: " + getCheckMessage(MSG_MANY_METHODS, 2, 1),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputMethodCount7.java"), expected);
      }
  
      @Test
      public void testInterfaceMemberScopeIsPublic() throws Exception {
  
          final String[] expected = {
              "17:5: " + getCheckMessage(MSG_PUBLIC_METHODS, 2, 1),
              "27:5: " + getCheckMessage(MSG_PUBLIC_METHODS, 2, 1),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputMethodCountInterfaceMemberScopeIsPublic.java"),
                  expected);
      }
  
      @Test
      public void testMethodCountRecords() throws Exception {
          final int max = 2;
  
          final String[] expected = {
              "18:5: " + getCheckMessage(MSG_MANY_METHODS, 3, max),
              "50:13: " + getCheckMessage(MSG_MANY_METHODS, 3, max),
              "68:5: " + getCheckMessage(MSG_MANY_METHODS, 3, max),
              "78:9: " + getCheckMessage(MSG_MANY_METHODS, 3, max),
              "87:13: " + getCheckMessage(MSG_MANY_METHODS, 4, max),
              "99:21: " + getCheckMessage(MSG_MANY_METHODS, 3, max),
          };
  
          verifyWithInlineConfigParser(
                  getNonCompilablePath("InputMethodCountRecords.java"), expected);
      }
  
  }
  