001package org.eclipse.aether.util.graph.visitor;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 * 
012 *  http://www.apache.org/licenses/LICENSE-2.0
013 * 
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import static org.junit.Assert.*;
023
024import java.util.List;
025
026import org.eclipse.aether.graph.DependencyNode;
027import org.eclipse.aether.internal.test.util.DependencyGraphParser;
028import org.junit.Test;
029
030public class PostorderNodeListGeneratorTest
031{
032
033    private DependencyNode parse( String resource )
034        throws Exception
035    {
036        return new DependencyGraphParser( "visitor/ordered-list/" ).parseResource( resource );
037    }
038
039    private void assertSequence( List<DependencyNode> actual, String... expected )
040    {
041        assertEquals( actual.toString(), expected.length, actual.size() );
042        for ( int i = 0; i < expected.length; i++ )
043        {
044            DependencyNode node = actual.get( i );
045            assertEquals( actual.toString(), expected[i], node.getDependency().getArtifact().getArtifactId() );
046        }
047    }
048
049    @Test
050    public void testOrdering()
051        throws Exception
052    {
053        DependencyNode root = parse( "simple.txt" );
054
055        PostorderNodeListGenerator visitor = new PostorderNodeListGenerator();
056        root.accept( visitor );
057
058        assertSequence( visitor.getNodes(), "c", "b", "e", "d", "a" );
059    }
060
061    @Test
062    public void testDuplicateSuppression()
063        throws Exception
064    {
065        DependencyNode root = parse( "cycles.txt" );
066
067        PostorderNodeListGenerator visitor = new PostorderNodeListGenerator();
068        root.accept( visitor );
069
070        assertSequence( visitor.getNodes(), "c", "b", "e", "d", "a" );
071    }
072
073}