////////////////////////////////////////////////////////////////////////////////
   // 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.checks.imports;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  import static org.junit.Assert.assertSame;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.fail;
  
  import java.io.File;
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  import java.net.MalformedURLException;
  import java.net.URI;
  
  import org.junit.Test;
  import org.xml.sax.Attributes;
  import org.xml.sax.InputSource;
  import org.xml.sax.SAXException;
  import org.xml.sax.helpers.AttributesImpl;
  
  import com.puppycrawl.tools.checkstyle.api.CheckstyleException;
  
  public class ImportControlLoaderTest {
  
      private static String getPath(String filename) {
          return "src/test/resources/com/puppycrawl/tools/"
                  + "checkstyle/checks/imports/importcontrolloader/" + filename;
      }
  
      @Test
      public void testLoad() throws CheckstyleException {
          final AbstractImportControl root =
                  ImportControlLoader.load(
                  new File(getPath("InputImportControlLoaderComplete.xml")).toURI());
          assertNotNull("Import root should not be null", root);
      }
  
      @Test
      public void testWrongFormatUri() throws Exception {
          try {
              ImportControlLoader.load(new URI("aaa://"
                      + getPath("InputImportControlLoaderComplete.xml")));
              fail("exception expected");
          }
          catch (CheckstyleException ex) {
              assertSame("Invalid exception class",
                      MalformedURLException.class, ex.getCause().getClass());
              assertEquals("Invalid exception message",
                      "unknown protocol: aaa", ex.getCause().getMessage());
          }
      }
  
      @Test
      public void testExtraElementInConfig() throws Exception {
          final AbstractImportControl root =
                  ImportControlLoader.load(
                      new File(getPath("InputImportControlLoaderWithNewElement.xml")).toURI());
          assertNotNull("Import root should not be null", root);
      }
  
      @Test
      // UT uses Reflection to avoid removing null-validation from static method
      public void testSafeGetThrowsException() throws Exception {
          final AttributesImpl attr = new AttributesImpl() {
              @Override
              public String getValue(int index) {
                  return null;
                  }
              };
          try {
              final Class<?> clazz = ImportControlLoader.class;
              final Method privateMethod = clazz.getDeclaredMethod("safeGet",
                  Attributes.class, String.class);
              privateMethod.setAccessible(true);
              privateMethod.invoke(null, attr, "you_cannot_find_me");
              fail("exception expected");
          }
          catch (InvocationTargetException ex) {
              assertSame("Invalid exception class", SAXException.class, ex.getCause().getClass());
              assertEquals("Invalid exception message",
                     "missing attribute you_cannot_find_me", ex.getCause().getMessage());
         }
     }
 
     @Test
     // UT uses Reflection to cover IOException from 'loader.parseInputSource(source);'
     // because this is possible situation (though highly unlikely), which depends on hardware
     // and is difficult to emulate
     public void testLoadThrowsException() throws Exception {
         final InputSource source = new InputSource();
         try {
             final Class<?> clazz = ImportControlLoader.class;
             final Method privateMethod = clazz.getDeclaredMethod("load", InputSource.class,
                 URI.class);
             privateMethod.setAccessible(true);
             privateMethod.invoke(null, source,
                     new File(getPath("InputImportControlLoaderComplete.xml")).toURI());
             fail("exception expected");
         }
         catch (InvocationTargetException ex) {
             assertSame("Invalid exception class",
                     CheckstyleException.class, ex.getCause().getClass());
             assertTrue("Invalid exception message: " + ex.getCause().getMessage(),
                     ex.getCause().getMessage().startsWith("unable to read"));
         }
     }
 
 }