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.coding;
  
  import static com.google.common.truth.Truth.assertWithMessage;
  import static com.puppycrawl.tools.checkstyle.checks.coding.FallThroughCheck.MSG_FALL_THROUGH;
  import static com.puppycrawl.tools.checkstyle.checks.coding.FallThroughCheck.MSG_FALL_THROUGH_LAST;
  
  import org.junit.jupiter.api.Test;
  
  import com.puppycrawl.tools.checkstyle.AbstractModuleTestSupport;
  import com.puppycrawl.tools.checkstyle.utils.CommonUtil;
  
  public class FallThroughCheckTest extends AbstractModuleTestSupport {
  
      @Override
      protected String getPackageLocation() {
          return "com/puppycrawl/tools/checkstyle/checks/coding/fallthrough";
      }
  
      @Test
      public void testDefault() throws Exception {
          final String[] expected = {
              "22:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "46:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "55:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "61:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "78:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "95:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "131:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "187:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "377:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "380:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "382:40: " + getCheckMessage(MSG_FALL_THROUGH),
              "424:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "432:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "444:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "454:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "490:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "491:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "492:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "529:15: " + getCheckMessage(MSG_FALL_THROUGH),
              "531:15: " + getCheckMessage(MSG_FALL_THROUGH),
              "533:15: " + getCheckMessage(MSG_FALL_THROUGH),
              "535:15: " + getCheckMessage(MSG_FALL_THROUGH),
              "537:15: " + getCheckMessage(MSG_FALL_THROUGH),
          };
          verifyWithInlineConfigParser(
                  getPath("InputFallThroughDefault.java"),
                 expected);
      }
  
      @Test
      public void testTryWithResources() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getNonCompilablePath("InputFallThrough.java"),
                 expected);
      }
  
      @Test
      public void testTryCatchInSwitch() throws Exception {
          final String[] expected = {
              "37:13: " + getCheckMessage(MSG_FALL_THROUGH),
          };
          verifyWithInlineConfigParser(getPath("InputFallThroughTryCatchInSwitch.java"), expected);
      }
  
      @Test
      public void testStringSwitch() throws Exception {
          final String[] expected = {
              "21:9: " + getCheckMessage(MSG_FALL_THROUGH),
          };
          verifyWithInlineConfigParser(getPath("InputFallThroughStringSwitch.java"), expected);
      }
  
      @Test
      public void testCharacterSwitch() throws Exception {
          final String[] expected = {
              "19:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "30:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "38:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "44:17: " + getCheckMessage(MSG_FALL_THROUGH),
              "48:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "63:13: " + getCheckMessage(MSG_FALL_THROUGH),
          };
          verifyWithInlineConfigParser(getPath("InputFallThroughCharacterSwitch.java"), expected);
      }
  
      @Test
      public void testLastCaseGroup() throws Exception {
          final String[] expected = {
              "22:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "46:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "55:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "61:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "78:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "95:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "131:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "131:13: " + getCheckMessage(MSG_FALL_THROUGH_LAST),
              "187:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "377:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "380:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "382:40: " + getCheckMessage(MSG_FALL_THROUGH),
              "384:11: " + getCheckMessage(MSG_FALL_THROUGH_LAST),
              "424:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "432:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "444:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "454:9: " + getCheckMessage(MSG_FALL_THROUGH),
              // line 490 violation expected till https://github.com/checkstyle/checkstyle/pull/12966
              "490:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "491:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "492:9: " + getCheckMessage(MSG_FALL_THROUGH),
          };
          verifyWithInlineConfigParser(
                  getPath("InputFallThrough.java"),
                 expected);
      }
  
      @Test
      public void testOwnPattern() throws Exception {
  
          final String[] expected = {
              "22:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "46:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "55:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "61:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "78:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "95:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "131:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "153:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "178:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "187:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "194:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "212:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "230:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "260:26: " + getCheckMessage(MSG_FALL_THROUGH),
              "274:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "289:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "292:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "296:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "298:25: " + getCheckMessage(MSG_FALL_THROUGH),
              "314:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "317:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "319:25: " + getCheckMessage(MSG_FALL_THROUGH),
              "335:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "338:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "340:23: " + getCheckMessage(MSG_FALL_THROUGH),
              "356:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "359:11: " + getCheckMessage(MSG_FALL_THROUGH),
              "361:30: " + getCheckMessage(MSG_FALL_THROUGH),
              "424:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "432:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "444:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "454:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "481:12: " + getCheckMessage(MSG_FALL_THROUGH),
              "490:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "491:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "492:9: " + getCheckMessage(MSG_FALL_THROUGH),
          };
          verifyWithInlineConfigParser(
                  getPath("InputFallThrough3.java"),
                 expected);
      }
  
      @Test
      public void testOwnPatternTryWithResources() throws Exception {
  
          final String[] expected = {
              "54:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "58:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "64:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "70:9: " + getCheckMessage(MSG_FALL_THROUGH),
              "77:9: " + getCheckMessage(MSG_FALL_THROUGH),
          };
          verifyWithInlineConfigParser(
                  getNonCompilablePath("InputFallThrough2.java"),
                 expected);
      }
  
      @Test
      public void testWithEmoji() throws Exception {
          final String[] expected = {
              "22:17: " + getCheckMessage(MSG_FALL_THROUGH),
              "25:17: " + getCheckMessage(MSG_FALL_THROUGH),
              "49:17: " + getCheckMessage(MSG_FALL_THROUGH),
              "52:17: " + getCheckMessage(MSG_FALL_THROUGH),
          };
          verifyWithInlineConfigParser(
                  getPath("InputFallThroughWithEmoji.java"), expected);
      }
  
      @Test
      public void testTokensNotNull() {
          final FallThroughCheck check = new FallThroughCheck();
          assertWithMessage("Acceptable tokens should not be null")
              .that(check.getAcceptableTokens())
              .isNotNull();
          assertWithMessage("Default tokens should not be null")
              .that(check.getDefaultTokens())
              .isNotNull();
          assertWithMessage("Required tokens should not be null")
              .that(check.getRequiredTokens())
              .isNotNull();
      }
  
      @Test
      public void testFallThroughNoElse() throws Exception {
          final String[] expected = {
              "28:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "43:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "47:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "54:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "68:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "75:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "88:21: " + getCheckMessage(MSG_FALL_THROUGH),
              "94:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "96:13: " + getCheckMessage(MSG_FALL_THROUGH),
          };
          verifyWithInlineConfigParser(
                  getPath("InputFallThrough2.java"),
              expected);
      }
  
      @Test
      public void testYield() throws Exception {
          final String[] expected = {
              "19:9: " + getCheckMessage(MSG_FALL_THROUGH),
          };
          verifyWithInlineConfigParser(
                  getNonCompilablePath("InputFallThrough3.java"),
                  expected);
      }
  
      @Test
      public void testLastCase() throws Exception {
          final String[] expected = {
              "48:11: " + getCheckMessage(MSG_FALL_THROUGH_LAST),
              "83:11: " + getCheckMessage(MSG_FALL_THROUGH_LAST),
          };
          verifyWithInlineConfigParser(
                  getPath("InputFallThrough4.java"),
                  expected);
      }
  
      @Test
      public void testIfElse() throws Exception {
          final String[] expected = {
              "94:13: " + getCheckMessage(MSG_FALL_THROUGH),
          };
          verifyWithInlineConfigParser(
                  getPath("InputFallThrough5.java"),
                  expected);
      }
  
      @Test
      public void testFallThrough() throws Exception {
          final String[] expected = {
              "16:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "18:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "23:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "25:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "27:13: " + getCheckMessage(MSG_FALL_THROUGH),
              // line 37 needs consideration https://github.com/checkstyle/checkstyle/pull/12966
              "37:10: " + getCheckMessage(MSG_FALL_THROUGH),
              "52:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "65:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "80:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "94:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "109:13: " + getCheckMessage(MSG_FALL_THROUGH),
          };
          verifyWithInlineConfigParser(
                  getPath("InputFallThrough6.java"),
                  expected);
      }
  
      @Test
      public void testFallThroughNonCompilable4() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getNonCompilablePath("InputFallThrough4.java"),
                  expected);
      }
  
      @Test
      public void testFallThroughComment() throws Exception {
          final String[] expected = {
              "20:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "43:13: " + getCheckMessage(MSG_FALL_THROUGH),
          };
          verifyWithInlineConfigParser(
                  getPath("InputFallThroughFallThroughLotsOfComment.java"),
                  expected);
      }
  
      @Test
      public void testFallThroughComment2() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
          verifyWithInlineConfigParser(
                  getPath("InputFallThroughFallThroughLotsOfComment2.java"),
                  expected);
      }
  
      @Test
      public void testFallThrough7() throws Exception {
          final String[] expected = {
              "21:13: " + getCheckMessage(MSG_FALL_THROUGH_LAST),
              "36:13: " + getCheckMessage(MSG_FALL_THROUGH_LAST),
              "50:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "50:13: " + getCheckMessage(MSG_FALL_THROUGH_LAST),
              "64:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "111:13: " + getCheckMessage(MSG_FALL_THROUGH_LAST),
          };
          verifyWithInlineConfigParser(
                  getPath("InputFallThrough7.java"),
                  expected);
      }
  
      @Test
      public void testLastLine() throws Exception {
          final String[] expected = {
              "21:13: " + getCheckMessage(MSG_FALL_THROUGH),
              "99:39: " + getCheckMessage(MSG_FALL_THROUGH_LAST),
          };
          verifyWithInlineConfigParser(
                  getPath("InputFallThroughLastLineCommentCheck.java"),
                  expected);
      }
  
      @Test
      public void testLastLine2() throws Exception {
          final String[] expected = {
              "19:13: " + getCheckMessage(MSG_FALL_THROUGH_LAST),
              "22:13: " + getCheckMessage(MSG_FALL_THROUGH_LAST),
              "25:13: " + getCheckMessage(MSG_FALL_THROUGH_LAST),
          };
          verifyWithInlineConfigParser(
                  getNonCompilablePath("InputFallThrough5.java"),
                  expected);
      }
  }
  