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.google.checkstyle.test.chapter3filestructure.rule333orderingandspacing;
  
  import org.junit.jupiter.api.Test;
  
  import com.google.checkstyle.test.base.AbstractGoogleModuleTestSupport;
  import com.puppycrawl.tools.checkstyle.api.Configuration;
  import com.puppycrawl.tools.checkstyle.checks.imports.CustomImportOrderCheck;
  import com.puppycrawl.tools.checkstyle.utils.CommonUtil;
  
  public class CustomImportOrderTest extends AbstractGoogleModuleTestSupport {
  
      /** Shortcuts to make code more compact. */
      private static final String MSG_LINE_SEPARATOR = CustomImportOrderCheck.MSG_LINE_SEPARATOR;
      private static final String MSG_SEPARATED_IN_GROUP =
          CustomImportOrderCheck.MSG_SEPARATED_IN_GROUP;
      private static final String MSG_LEX = CustomImportOrderCheck.MSG_LEX;
      private static final String MSG_NONGROUP_EXPECTED =
          CustomImportOrderCheck.MSG_NONGROUP_EXPECTED;
  
      private static final String STATIC = CustomImportOrderCheck.STATIC_RULE_GROUP;
  
      private final Class<CustomImportOrderCheck> clazz = CustomImportOrderCheck.class;
  
      @Override
      protected String getPackageLocation() {
          return "com/google/checkstyle/test/chapter3filestructure/rule333orderingandspacing";
      }
  
      @Test
      public void testCustomImport1() throws Exception {
          final String[] expected = {
              "4:1: " + getCheckMessage(clazz, MSG_LEX, "java.awt.Button.ABORT",
                  "java.io.File.createTempFile"),
              "6:1: " + getCheckMessage(clazz, MSG_LINE_SEPARATOR, "java.awt.Button"),
              "8:1: " + getCheckMessage(clazz, MSG_LEX, "java.awt.Dialog", "java.awt.Frame"),
              "12:1: " + getCheckMessage(clazz, MSG_LEX, "java.io.File", "javax.swing.JTable"),
              "13:1: " + getCheckMessage(clazz, MSG_LEX, "java.io.IOException", "javax.swing.JTable"),
              "14:1: " + getCheckMessage(clazz, MSG_LEX, "java.io.InputStream", "javax.swing.JTable"),
              "15:1: " + getCheckMessage(clazz, MSG_LEX, "java.io.Reader", "javax.swing.JTable"),
              "17:1: " + getCheckMessage(clazz, MSG_SEPARATED_IN_GROUP,
                  "com.google.common.base.Ascii"),
              "17:1: " + getCheckMessage(clazz, MSG_LEX, "com.google.common.base.Ascii",
                  "javax.swing.JTable"),
          };
  
          final Configuration checkConfig = getModuleConfig("CustomImportOrder");
          final String filePath = getPath("InputCustomImportOrder1.java");
  
          final Integer[] warnList = getLinesWithWarn(filePath);
          verify(checkConfig, filePath, expected, warnList);
      }
  
      @Test
      public void testCustomImport2() throws Exception {
          final String[] expected = {
              "4:1: " + getCheckMessage(clazz, MSG_LEX, "java.awt.Button.ABORT",
                  "java.io.File.createTempFile"),
              "9:1: " + getCheckMessage(clazz, MSG_LEX, "java.util.*", "java.util.StringTokenizer"),
              "11:1: " + getCheckMessage(clazz, MSG_LEX, "java.util.concurrent.*",
                  "java.util.concurrent.AbstractExecutorService"),
              "13:1: " + getCheckMessage(clazz, MSG_SEPARATED_IN_GROUP,
                  "com.google.checkstyle.test.chapter2filebasic.rule21filename.*"),
              "13:1: " + getCheckMessage(clazz, MSG_LEX,
                  "com.google.checkstyle.test.chapter2filebasic.rule21filename.*",
                  "java.util.concurrent.AbstractExecutorService"),
              "14:1: " + getCheckMessage(clazz, MSG_LEX,
                  "com.google.checkstyle.test.chapter3filestructure.rule3sourcefile.*",
                  "java.util.concurrent.AbstractExecutorService"),
              "16:1: " + getCheckMessage(clazz, MSG_SEPARATED_IN_GROUP,
                  "com.google.common.reflect.*"),
              "16:1: " + getCheckMessage(clazz, MSG_LEX, "com.google.common.reflect.*",
                  "java.util.concurrent.AbstractExecutorService"),
          };
  
          final Configuration checkConfig = getModuleConfig("CustomImportOrder");
          final String filePath = getPath("InputCustomImportOrder2.java");
  
          final Integer[] warnList = getLinesWithWarn(filePath);
          verify(checkConfig, filePath, expected, warnList);
      }
  
      @Test
      public void testCustomImport3() throws Exception {
          final String[] expected = {
              "4:1: " + getCheckMessage(clazz, MSG_LINE_SEPARATOR, "java.awt.Dialog"),
              "5:1: " + getCheckMessage(clazz, MSG_NONGROUP_EXPECTED, STATIC,
                  "javax.swing.WindowConstants.*"),
              "7:1: " + getCheckMessage(clazz, MSG_SEPARATED_IN_GROUP,
                  "com.google.checkstyle.test.chapter2filebasic.rule21filename.*"),
              "7:1: " + getCheckMessage(clazz, MSG_LEX,
                  "com.google.checkstyle.test.chapter2filebasic.rule21filename.*", "java.awt.Dialog"),
              "8:1: " + getCheckMessage(clazz, MSG_LEX, "com.google.common.reflect.*",
                  "java.awt.Dialog"),
              "9:1: " + getCheckMessage(clazz, MSG_LEX,
                  "com.google.checkstyle.test.chapter3filestructure.rule3sourcefile.*",
                  "java.awt.Dialog"),
              "11:1: " + getCheckMessage(clazz, MSG_NONGROUP_EXPECTED, STATIC,
                  "java.io.File.createTempFile"),
              "13:1: " + getCheckMessage(clazz, MSG_LEX, "java.util.*", "java.util.StringTokenizer"),
              "15:1: " + getCheckMessage(clazz, MSG_LEX, "java.util.concurrent.*",
                  "java.util.concurrent.AbstractExecutorService"),
          };
  
          final Configuration checkConfig = getModuleConfig("CustomImportOrder");
          final String filePath = getPath("InputCustomImportOrder3.java");
  
          final Integer[] warnList = getLinesWithWarn(filePath);
          verify(checkConfig, filePath, expected, warnList);
      }
  
      @Test
      public void testCustomImport4() throws Exception {
          final String[] expected = {
              "7:1: " + getCheckMessage(clazz, MSG_SEPARATED_IN_GROUP,
                  "javax.swing.WindowConstants.*"),
              "15:1: " + getCheckMessage(clazz, MSG_SEPARATED_IN_GROUP,
                  "java.util.StringTokenizer"),
              "17:1: " + getCheckMessage(clazz, MSG_SEPARATED_IN_GROUP,
                  "java.util.concurrent.AbstractExecutorService"),
          };
  
          final Configuration checkConfig = getModuleConfig("CustomImportOrder");
          final String filePath = getPath("InputCustomImportOrder4.java");
  
          final Integer[] warnList = getLinesWithWarn(filePath);
          verify(checkConfig, filePath, expected, warnList);
      }
  
      @Test
      public void testCustomImport5() throws Exception {
          final String[] expected = {
              "9:1: " + getCheckMessage(clazz, MSG_SEPARATED_IN_GROUP,
                  "javax.swing.WindowConstants.*"),
              "13:1: " + getCheckMessage(clazz, MSG_LINE_SEPARATOR,
                  "com.google.checkstyle.test.chapter2filebasic.rule21filename.*"),
              "17:1: " + getCheckMessage(clazz, MSG_SEPARATED_IN_GROUP,
                  "com.google.common.reflect.*"),
              "21:1: " + getCheckMessage(clazz, MSG_SEPARATED_IN_GROUP,
                  "java.util.StringTokenizer"),
              "25:1: " + getCheckMessage(clazz, MSG_SEPARATED_IN_GROUP,
                  "java.util.concurrent.AbstractExecutorService"),
          };
  
          final Configuration checkConfig = getModuleConfig("CustomImportOrder");
          final String filePath = getPath("InputCustomImportOrder5.java");
  
          final Integer[] warnList = getLinesWithWarn(filePath);
          verify(checkConfig, filePath, expected, warnList);
      }
  
      @Test
      public void testValid() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
  
          final Configuration checkConfig = getModuleConfig("CustomImportOrder");
          final String filePath = getPath("InputCustomImportOrderValid.java");
  
          final Integer[] warnList = getLinesWithWarn(filePath);
          verify(checkConfig, filePath, expected, warnList);
      }
  
      @Test
      public void testValid2() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
  
          final Configuration checkConfig = getModuleConfig("CustomImportOrder");
          final String filePath = getPath("InputCustomImportOrderValid2.java");
  
          final Integer[] warnList = getLinesWithWarn(filePath);
          verify(checkConfig, filePath, expected, warnList);
      }
  
      @Test
      public void testValidGoogleStyleOrderOfImports() throws Exception {
          final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
  
          final Configuration checkConfig = getModuleConfig("CustomImportOrder");
          final String filePath = getPath("InputCustomImportOrderNoImports.java");
  
          final Integer[] warnList = getLinesWithWarn(filePath);
          verify(checkConfig, filePath, expected, warnList);
      }
  
  }
  