package org.eclipse.aether.util.graph.transformer;
   
   /*
    * 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.util.Collection;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Queue;
  
  import org.eclipse.aether.collection.DependencyGraphTransformer;
  import org.eclipse.aether.graph.DependencyNode;
  import org.eclipse.aether.internal.test.util.DependencyGraphParser;
  import org.eclipse.aether.util.graph.transformer.ConflictIdSorter;
  import org.eclipse.aether.util.graph.transformer.TransformationContextKeys;
  import org.junit.Test;
  
  /**
   */
  public class ConflictIdSorterTest
      extends AbstractDependencyGraphTransformerTest
  {
  
      @Override
      protected DependencyGraphTransformer newTransformer()
      {
          return new ChainedDependencyGraphTransformer( new SimpleConflictMarker(), new ConflictIdSorter() );
      }
  
      @Override
      protected DependencyGraphParser newParser()
      {
          return new DependencyGraphParser( "transformer/conflict-id-sorter/" );
      }
  
      private void expectOrder( List<String> sorted, String... ids )
      {
          Queue<String> queue = new LinkedList<>( sorted );
  
          for ( String id : ids )
          {
              String item = queue.poll();
              assertNotNull( String.format( "not enough conflict groups (no match for '%s'", id ), item );
  
              if ( !"*".equals( id ) )
              {
                  assertEquals( id, item );
              }
          }
  
          assertTrue( String.format( "leftover conflict groups (remaining: '%s')", queue ), queue.isEmpty() );
      }
  
      private void expectOrder( String... id )
      {
          @SuppressWarnings( "unchecked" )
          List<String> sorted = (List<String>) context.get( TransformationContextKeys.SORTED_CONFLICT_IDS );
          expectOrder( sorted, id );
      }
  
      private void expectCycle( boolean cycle )
      {
          Collection<?> cycles = (Collection<?>) context.get( TransformationContextKeys.CYCLIC_CONFLICT_IDS );
          assertEquals( cycle, !cycles.isEmpty() );
      }
  
      @Test
      public void testSimple()
          throws Exception
      {
          DependencyNode node = parseResource( "simple.txt" );
          assertSame( node, transform( node ) );
  
          expectOrder( "gid2:aid::jar", "gid:aid::jar", "gid:aid2::jar" );
          expectCycle( false );
      }
  
      @Test
      public void testCycle()
          throws Exception
      {
         DependencyNode node = parseResource( "cycle.txt" );
         assertSame( node, transform( node ) );
 
         expectOrder( "gid:aid::jar", "gid2:aid::jar" );
         expectCycle( true );
     }
 
     @Test
     public void testCycles()
         throws Exception
     {
         DependencyNode node = parseResource( "cycles.txt" );
         assertSame( node, transform( node ) );
 
         expectOrder( "*", "*", "*", "gid:aid::jar" );
         expectCycle( true );
     }
 
     @Test
     public void testNoConflicts()
         throws Exception
     {
         DependencyNode node = parseResource( "no-conflicts.txt" );
         assertSame( node, transform( node ) );
 
         expectOrder( "gid:aid::jar", "gid3:aid::jar", "gid2:aid::jar", "gid4:aid::jar" );
         expectCycle( false );
     }
 
 }