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.BooleanExpressionComplexityCheck.MSG_KEY;
  
  import org.antlr.v4.runtime.CommonToken;
  import org.junit.jupiter.api.Test;
  
  import com.puppycrawl.tools.checkstyle.AbstractModuleTestSupport;
  import com.puppycrawl.tools.checkstyle.DetailAstImpl;
  import com.puppycrawl.tools.checkstyle.api.TokenTypes;
  import com.puppycrawl.tools.checkstyle.utils.CommonUtil;
  
  public class BooleanExpressionComplexityCheckTest extends AbstractModuleTestSupport {
  
      @Override
      protected String getPackageLocation() {
          return "com/puppycrawl/tools/checkstyle/checks/metrics/booleanexpressioncomplexity";
      }
  
      @Test
      public void test() throws Exception {
  
          final String[] expected = {
              "21:9: " + getCheckMessage(MSG_KEY, 4, 3),
              "38:46: " + getCheckMessage(MSG_KEY, 4, 3),
              "48:9: " + getCheckMessage(MSG_KEY, 6, 3),
              "54:34: " + getCheckMessage(MSG_KEY, 4, 3),
              "56:34: " + getCheckMessage(MSG_KEY, 4, 3),
          };
  
          verifyWithInlineConfigParser(
                  getPath("InputBooleanExpressionComplexity.java"), expected);
      }
  
      @Test
      public void testNoBitwise() throws Exception {
  
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
  
          verifyWithInlineConfigParser(
                  getPath("InputBooleanExpressionComplexity2.java"), expected);
      }
  
      @Test
      public void testNullPointerException() throws Exception {
  
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
  
          verifyWithInlineConfigParser(
                  getPath("InputBooleanExpressionComplexityNPE.java"), expected);
      }
  
      @Test
      public void testWrongToken() {
          final BooleanExpressionComplexityCheck booleanExpressionComplexityCheckObj =
              new BooleanExpressionComplexityCheck();
          final DetailAstImpl ast = new DetailAstImpl();
          ast.initialize(new CommonToken(TokenTypes.INTERFACE_DEF, "interface"));
          try {
              booleanExpressionComplexityCheckObj.visitToken(ast);
              assertWithMessage("exception expected").fail();
          }
          catch (IllegalArgumentException ex) {
              assertWithMessage("Invalid exception message")
                  .that(ex.getMessage())
                  .isEqualTo("Unknown type: interface[0x-1]");
          }
      }
  
      @Test
      public void testSmall() throws Exception {
  
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
  
          verifyWithInlineConfigParser(
                  getPath("InputBooleanExpressionComplexitySmall.java"), expected);
      }
  
      @Test
      public void testBooleanExpressionComplexityRecordsAndCompactCtors() throws Exception {
  
          final int max = 3;
  
          final String[] expected = {
              "16:12: " + getCheckMessage(MSG_KEY, 4, max),
              "24:23: " + getCheckMessage(MSG_KEY, 4, max),
              "35:23: " + getCheckMessage(MSG_KEY, 4, max),
              "45:27: " + getCheckMessage(MSG_KEY, 4, max),
          };
  
          verifyWithInlineConfigParser(
                  getNonCompilablePath(
                          "InputBooleanExpressionComplexityRecordsAndCompactCtors.java"),
                  expected);
      }
  
      @Test
      public void testLeaves() throws Exception {
  
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
  
          verifyWithInlineConfigParser(
                  getPath("InputBooleanExpressionComplexityLeaves.java"), expected);
      }
  
      @Test
      public void testRecordLeaves() throws Exception {
  
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
  
          verifyWithInlineConfigParser(
                  getNonCompilablePath("InputBooleanExpressionComplexityRecordLeaves.java"),
                  expected);
      }
  
  }
  