////////////////////////////////////////////////////////////////////////////////
   // checkstyle: Checks Java source code for adherence to a set of rules.
   // Copyright (C) 2001-2019 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;
  
  import static com.puppycrawl.tools.checkstyle.internal.utils.TestUtil.isUtilsClassHasPrivateConstructor;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  import static org.junit.Assert.assertNull;
  import static org.junit.Assert.assertTrue;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import javax.xml.parsers.ParserConfigurationException;
  
  import org.junit.Test;
  import org.powermock.reflect.Whitebox;
  import org.xml.sax.SAXException;
  import org.xml.sax.XMLReader;
  
  public class XmlLoaderTest {
  
      @Test
      public void testParserConfiguredSuccessfully() throws Exception {
          final DummyLoader dummyLoader = new DummyLoader(new HashMap<>(1));
          final XMLReader parser = Whitebox.getInternalState(dummyLoader, "parser");
          assertEquals("Invalid entity resolver", dummyLoader, parser.getEntityResolver());
      }
  
      @Test
      public void testIsProperUtilsClass() throws ReflectiveOperationException {
          assertTrue("Constructor is not private", isUtilsClassHasPrivateConstructor(
                  XmlLoader.LoadExternalDtdFeatureProvider.class, true));
      }
  
      @Test
      public void testResolveEntityDefault() throws Exception {
          final Map<String, String> map = new HashMap<>();
          map.put("predefined", "/google.xml");
          final DummyLoader dummyLoader = new DummyLoader(map);
          assertNull("Invalid entity", dummyLoader.resolveEntity("notPredefined", "BAD"));
      }
  
      @Test
      public void testResolveEntityMap() throws Exception {
          final Map<String, String> map = new HashMap<>();
          map.put("predefined", "/google.xml");
          final DummyLoader dummyLoader = new DummyLoader(map);
          assertNotNull("Invalid entity", dummyLoader.resolveEntity("predefined", "BAD"));
      }
  
      private static final class DummyLoader extends XmlLoader {
  
          /* package */ DummyLoader(Map<String, String> publicIdToResourceNameMap)
                  throws SAXException, ParserConfigurationException {
              super(publicIdToResourceNameMap);
          }
  
      }
  
  }