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 org.checkstyle.suppressionxpathfilter;
  
  import static com.puppycrawl.tools.checkstyle.checks.naming.AbstractNameCheck.MSG_INVALID_PATTERN;
  
  import java.io.File;
  import java.util.Collections;
  import java.util.List;
  
  import org.junit.jupiter.api.Test;
  
  import com.puppycrawl.tools.checkstyle.DefaultConfiguration;
  import com.puppycrawl.tools.checkstyle.checks.naming.ConstantNameCheck;
  
  public class XpathRegressionConstantNameTest extends AbstractXpathTestSupport {
  
      private static final Class<ConstantNameCheck> CLASS = ConstantNameCheck.class;
      private static final String PATTERN = "^[A-Z][A-Z0-9]*(_[A-Z0-9]+)*$";
      private final String checkName = CLASS.getSimpleName();
  
      @Override
      protected String getCheckName() {
          return checkName;
      }
  
      @Test
      public void testLowercase() throws Exception {
          final File fileToProcess = new File(
              getPath("SuppressionXpathRegressionConstantNameLowercase.java"));
  
          final DefaultConfiguration moduleConfig = createModuleConfig(CLASS);
  
          final String[] expectedViolation = {
              "4:29: " + getCheckMessage(CLASS, MSG_INVALID_PATTERN, "number", PATTERN),
          };
  
          final List<String> expectedXpathQueries = Collections.singletonList(
              "/COMPILATION_UNIT/CLASS_DEF[./IDENT"
                  + "[@text='SuppressionXpathRegressionConstantNameLowercase']]"
                  + "/OBJBLOCK/VARIABLE_DEF/IDENT[@text='number']"
          );
  
          runVerifications(moduleConfig, fileToProcess, expectedViolation,
              expectedXpathQueries);
      }
  
      @Test
      public void testCamelCase() throws Exception {
          final File fileToProcess =
              new File(getPath("SuppressionXpathRegressionConstantNameCamelCase.java"));
  
          final DefaultConfiguration moduleConfig = createModuleConfig(CLASS);
  
          final String[] expectedViolation = {
              "4:29: " + getCheckMessage(CLASS,
                  MSG_INVALID_PATTERN, "badConstant", PATTERN),
          };
  
          final List<String> expectedXpathQueries = Collections.singletonList(
              "/COMPILATION_UNIT/CLASS_DEF"
                  + "[./IDENT[@text='SuppressionXpathRegressionConstantNameCamelCase']]"
                  + "/OBJBLOCK/VARIABLE_DEF/IDENT[@text='badConstant']"
          );
  
          runVerifications(moduleConfig, fileToProcess, expectedViolation,
              expectedXpathQueries);
      }
  
      @Test
      public void testWithBeginningUnderscore() throws Exception {
          final File fileToProcess = new File(
              getPath("SuppressionXpathRegressionConstantNameWithBeginningUnderscore.java"));
  
          final DefaultConfiguration moduleConfig = createModuleConfig(CLASS);
  
          final String[] expectedViolation = {
              "4:33: " + getCheckMessage(CLASS, MSG_INVALID_PATTERN, "_CONSTANT", PATTERN),
          };
  
          final List<String> expectedXpathQueries = Collections.singletonList(
              "/COMPILATION_UNIT/CLASS_DEF[./IDENT"
                  + "[@text='SuppressionXpathRegressionConstantNameWithBeginningUnderscore']]"
                  + "/OBJBLOCK/VARIABLE_DEF/IDENT[@text='_CONSTANT']"
          );
  
          runVerifications(moduleConfig, fileToProcess, expectedViolation,
              expectedXpathQueries);
      }
  
      @Test
      public void testWithTwoUnderscores() throws Exception {
          final File fileToProcess = new File(
              getPath("SuppressionXpathRegressionConstantNameWithTwoUnderscores.java"));
  
          final DefaultConfiguration moduleConfig = createModuleConfig(CLASS);
  
          final String[] expectedViolation = {
              "4:30: " + getCheckMessage(CLASS, MSG_INVALID_PATTERN, "BAD__NAME", PATTERN),
          };
  
          final List<String> expectedXpathQueries = Collections.singletonList(
              "/COMPILATION_UNIT/CLASS_DEF[./IDENT"
                  + "[@text='SuppressionXpathRegressionConstantNameWithTwoUnderscores']]"
                  + "/OBJBLOCK/VARIABLE_DEF/IDENT[@text='BAD__NAME']"
          );
  
          runVerifications(moduleConfig, fileToProcess, expectedViolation,
              expectedXpathQueries);
      }
  }
  