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.api;
  
  import static com.google.common.truth.Truth.assertWithMessage;
  import static com.puppycrawl.tools.checkstyle.internal.utils.TestUtil.isUtilsClassHasPrivateConstructor;
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.Locale;
  import java.util.ResourceBundle;
  import java.util.Set;
  import java.util.stream.Collectors;
  
  import org.junit.jupiter.api.Test;
  
  import com.puppycrawl.tools.checkstyle.utils.TokenUtil;
  
  public class TokenTypesTest {
  
      @Test
      public void testAllTokenTypesHasDescription() {
          final String tokenTypes = "com.puppycrawl.tools.checkstyle.api.tokentypes";
          final ResourceBundle bundle = ResourceBundle.getBundle(tokenTypes, Locale.ROOT);
  
          final Set<String> expected = Arrays.stream(TokenUtil.getAllTokenIds())
              .mapToObj(TokenUtil::getTokenName)
              .filter(name -> name.charAt(0) != '$')
              .collect(Collectors.toSet());
          final Set<String> actual = bundle.keySet();
          assertWithMessage("TokenTypes without description")
                  .that(actual)
                  .isEqualTo(expected);
      }
  
      @Test
      public void testAllDescriptionsEndsWithPeriod() {
          final Set<String> badDescriptions = Arrays.stream(TokenUtil.getAllTokenIds())
              .mapToObj(TokenUtil::getTokenName)
              .filter(name -> name.charAt(0) != '$')
              .map(TokenUtil::getShortDescription)
              .filter(desc -> desc.charAt(desc.length() - 1) != '.').collect(Collectors.toSet());
          assertWithMessage("Malformed TokenType descriptions")
                  .that(badDescriptions)
                  .isEqualTo(Collections.emptySet());
      }
  
      @Test
      public void testGetShortDescription() {
          assertWithMessage("short description for EQUAL")
                  .that(TokenUtil.getShortDescription("EQUAL"))
                  .isEqualTo("The <code>==</code> (equal) operator.");
  
          assertWithMessage("short description for LAND")
                  .that(TokenUtil.getShortDescription("LAND"))
                  .isEqualTo("The <code>&&</code> (conditional AND) operator.");
  
          assertWithMessage("short description for LCURLY")
                  .that(TokenUtil.getShortDescription("LCURLY"))
                  .isEqualTo("A left curly brace (<code>{</code>).");
  
          assertWithMessage("short description for SR_ASSIGN")
                  .that(TokenUtil.getShortDescription("SR_ASSIGN"))
                  .isEqualTo("The <code>>>=</code> (signed right shift assignment) operator.");
  
          assertWithMessage("short description for SL")
                  .that(TokenUtil.getShortDescription("SL"))
                  .isEqualTo("The <code><<</code> (shift left) operator.");
  
          assertWithMessage("short description for BSR")
                  .that(TokenUtil.getShortDescription("BSR"))
                  .isEqualTo("The <code>>>></code> (unsigned shift right) operator.");
      }
  
      @Test
      public void testIsProperUtilsClass() throws ReflectiveOperationException {
          assertWithMessage("Constructor is not private")
                  .that(isUtilsClassHasPrivateConstructor(TokenTypes.class))
                  .isTrue();
      }
  
  }
  