package org.eclipse.aether.internal.impl;
   
   /*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   * 
   *  http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  
  import static org.junit.Assert.*;
  
  import java.io.File;
  import java.nio.charset.StandardCharsets;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Properties;
  
  import org.eclipse.aether.internal.impl.TrackingFileManager;
  import org.eclipse.aether.internal.test.util.TestFileUtils;
  import org.junit.Test;
  
  /**
   */
  public class TrackingFileManagerTest
  {
  
      @Test
      public void testRead()
          throws Exception
      {
          TrackingFileManager tfm = new TrackingFileManager();
  
          File propFile = TestFileUtils.createTempFile( "#COMMENT\nkey1=value1\nkey2 : value2" );
          Properties props = tfm.read( propFile );
  
          assertNotNull( props );
          assertEquals( String.valueOf( props ), 2, props.size() );
          assertEquals( "value1", props.get( "key1" ) );
          assertEquals( "value2", props.get( "key2" ) );
  
          assertTrue( "Leaked file: " + propFile, propFile.delete() );
  
          props = tfm.read( propFile );
          assertNull( String.valueOf( props ), props );
      }
  
      @Test
      public void testReadNoFileLeak()
          throws Exception
      {
          TrackingFileManager tfm = new TrackingFileManager();
  
          for ( int i = 0; i < 1000; i++ )
          {
              File propFile = TestFileUtils.createTempFile( "#COMMENT\nkey1=value1\nkey2 : value2" );
              assertNotNull( tfm.read( propFile ) );
              assertTrue( "Leaked file: " + propFile, propFile.delete() );
          }
      }
  
      @Test
      public void testUpdate()
          throws Exception
      {
          TrackingFileManager tfm = new TrackingFileManager();
  
          // NOTE: The excessive repetitions are to check the update properly truncates the file
          File propFile = TestFileUtils.createTempFile( "key1=value1\nkey2 : value2\n".getBytes( StandardCharsets.UTF_8 ), 1000 );
  
          Map<String, String> updates = new HashMap<String, String>();
          updates.put( "key1", "v" );
          updates.put( "key2", null );
  
          tfm.update( propFile, updates );
  
          Properties props = tfm.read( propFile );
  
          assertNotNull( props );
          assertEquals( String.valueOf( props ), 1, props.size() );
          assertEquals( "v", props.get( "key1" ) );
          assertNull( String.valueOf( props.get( "key2" ) ), props.get( "key2" ) );
      }
  
      @Test
     public void testUpdateNoFileLeak()
         throws Exception
     {
         TrackingFileManager tfm = new TrackingFileManager();
 
         Map<String, String> updates = new HashMap<String, String>();
         updates.put( "k", "v" );
 
         for ( int i = 0; i < 1000; i++ )
         {
             File propFile = TestFileUtils.createTempFile( "#COMMENT\nkey1=value1\nkey2 : value2" );
             assertNotNull( tfm.update( propFile, updates ) );
             assertTrue( "Leaked file: " + propFile, propFile.delete() );
         }
     }
 
     @Test
     public void testLockingOnCanonicalPath()
         throws Exception
     {
         final TrackingFileManager tfm = new TrackingFileManager();
 
         final File propFile = TestFileUtils.createTempFile( "#COMMENT\nkey1=value1\nkey2 : value2" );
 
         final List<Throwable> errors = Collections.synchronizedList( new ArrayList<Throwable>() );
 
         Thread[] threads = new Thread[4];
         for ( int i = 0; i < threads.length; i++ )
         {
             String path = propFile.getParent();
             for ( int j = 0; j < i; j++ )
             {
                 path += "/.";
             }
             path += "/" + propFile.getName();
             final File file = new File( path );
 
             threads[i] = new Thread()
             {
                 public void run()
                 {
                     try
                     {
                         for ( int i = 0; i < 1000; i++ )
                         {
                             assertNotNull( tfm.read( file ) );
                         }
                     }
                     catch ( Throwable e )
                     {
                         errors.add( e );
                     }
                 }
             };
         }
 
         for ( Thread thread1 : threads )
         {
             thread1.start();
         }
 
         for ( Thread thread : threads )
         {
             thread.join();
         }
 
         assertEquals( Collections.emptyList(), errors );
     }
 
 }