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.metrics;
  
  import static com.google.common.truth.Truth.assertWithMessage;
  import static com.puppycrawl.tools.checkstyle.checks.metrics.CyclomaticComplexityCheck.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 CyclomaticComplexityCheckTest
      extends AbstractModuleTestSupport {
  
      @Override
      protected String getPackageLocation() {
          return "com/puppycrawl/tools/checkstyle/checks/metrics/cyclomaticcomplexity";
      }
  
      @Test
      public void testSwitchBlockAsSingleDecisionPointSetToTrue() throws Exception {
  
          final String[] expected = {
              "14:5: " + getCheckMessage(MSG_KEY, 2, 0),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputCyclomaticComplexitySwitchBlocks.java"), expected);
      }
  
      @Test
      public void testSwitchBlockAsSingleDecisionPointSetToFalse() throws Exception {
  
          final String[] expected = {
              "14:5: " + getCheckMessage(MSG_KEY, 5, 0),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputCyclomaticComplexitySwitchBlocks2.java"), expected);
      }
  
      @Test
      public void testEqualsMaxComplexity() throws Exception {
  
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
  
          verifyWithInlineConfigParser(
                  getPath("InputCyclomaticComplexitySwitchBlocks3.java"), expected);
      }
  
      @Test
      public void test() throws Exception {
  
          final String[] expected = {
              "15:5: " + getCheckMessage(MSG_KEY, 2, 0),
              "20:17: " + getCheckMessage(MSG_KEY, 2, 0),
              "32:5: " + getCheckMessage(MSG_KEY, 6, 0),
              "45:5: " + getCheckMessage(MSG_KEY, 3, 0),
              "55:5: " + getCheckMessage(MSG_KEY, 5, 0),
              "73:5: " + getCheckMessage(MSG_KEY, 3, 0),
              "86:5: " + getCheckMessage(MSG_KEY, 3, 0),
              "98:5: " + getCheckMessage(MSG_KEY, 3, 0),
              "110:5: " + getCheckMessage(MSG_KEY, 1, 0),
              "114:13: " + getCheckMessage(MSG_KEY, 2, 0),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputCyclomaticComplexity.java"), expected);
      }
  
      @Test
      public void testCyclomaticComplexityRecords() throws Exception {
  
          final int max = 0;
  
          final String[] expected = {
              "17:9: " + getCheckMessage(MSG_KEY, 11, max),
              "48:9: " + getCheckMessage(MSG_KEY, 11, max),
              "83:5: " + getCheckMessage(MSG_KEY, 11, max),
              "115:5: " + getCheckMessage(MSG_KEY, 11, max),
              "148:5: " + getCheckMessage(MSG_KEY, 11, max),
          };
  
          verifyWithInlineConfigParser(
                  getNonCompilablePath("InputCyclomaticComplexityRecords.java"), expected);
      }
  
      @Test
      public void testGetAcceptableTokens() {
          final CyclomaticComplexityCheck cyclomaticComplexityCheckObj =
              new CyclomaticComplexityCheck();
          final int[] actual = cyclomaticComplexityCheckObj.getAcceptableTokens();
          final int[] expected = {
              TokenTypes.CTOR_DEF,
              TokenTypes.METHOD_DEF,
              TokenTypes.INSTANCE_INIT,
              TokenTypes.STATIC_INIT,
              TokenTypes.LITERAL_WHILE,
              TokenTypes.LITERAL_DO,
              TokenTypes.LITERAL_FOR,
              TokenTypes.LITERAL_IF,
              TokenTypes.LITERAL_SWITCH,
              TokenTypes.LITERAL_CASE,
              TokenTypes.LITERAL_CATCH,
              TokenTypes.QUESTION,
              TokenTypes.LAND,
              TokenTypes.LOR,
              TokenTypes.COMPACT_CTOR_DEF,
          };
          assertWithMessage("Invalid acceptable tokens")
              .that(actual)
              .isEqualTo(expected);
      }
  
      @Test
      public void testGetRequiredTokens() {
          final CyclomaticComplexityCheck cyclomaticComplexityCheckObj =
              new CyclomaticComplexityCheck();
          final int[] actual = cyclomaticComplexityCheckObj.getRequiredTokens();
          final int[] expected = {
              TokenTypes.CTOR_DEF,
              TokenTypes.METHOD_DEF,
              TokenTypes.INSTANCE_INIT,
              TokenTypes.STATIC_INIT,
              TokenTypes.COMPACT_CTOR_DEF,
          };
          assertWithMessage("Invalid required tokens")
              .that(actual)
              .isEqualTo(expected);
      }
  
      @Test
      public void testHighMax() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
  
          verifyWithInlineConfigParser(
                  getPath("InputCyclomaticComplexitySwitchBlocks4.java"), expected);
      }
  
      @Test
      public void testDefaultMax() throws Exception {
          final String[] expected = {
              "14:5: " + getCheckMessage(MSG_KEY, 12, 10),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputCyclomaticComplexitySwitchBlocks5.java"), expected);
      }
  
  }
  