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.DependencyFilter;
027import org.eclipse.aether.graph.DependencyNode;
028import org.eclipse.aether.internal.test.util.DependencyGraphParser;
029import org.junit.Test;
030
031public class FilteringDependencyVisitorTest
032{
033
034    private DependencyNode parse( String resource )
035        throws Exception
036    {
037        return new DependencyGraphParser( "visitor/filtering/" ).parseResource( resource );
038    }
039
040    @Test
041    public void testFilterCalledWithProperParentStack()
042        throws Exception
043    {
044        DependencyNode root = parse( "parents.txt" );
045
046        final StringBuilder buffer = new StringBuilder( 256 );
047        DependencyFilter filter = new DependencyFilter()
048        {
049            public boolean accept( DependencyNode node, List<DependencyNode> parents )
050            {
051                for ( DependencyNode parent : parents )
052                {
053                    buffer.append( parent.getDependency().getArtifact().getArtifactId() );
054                }
055                buffer.append( "," );
056                return false;
057            }
058        };
059
060        FilteringDependencyVisitor visitor = new FilteringDependencyVisitor( new PreorderNodeListGenerator(), filter );
061        root.accept( visitor );
062
063        assertEquals( ",a,ba,cba,a,ea,", buffer.toString() );
064    }
065
066}