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 java.util.Objects.requireNonNull; 023import static org.junit.Assert.*; 024 025import java.util.List; 026 027import org.eclipse.aether.graph.DependencyFilter; 028import org.eclipse.aether.graph.DependencyNode; 029import org.eclipse.aether.internal.test.util.DependencyGraphParser; 030import org.junit.Test; 031 032public class FilteringDependencyVisitorTest 033{ 034 035 private DependencyNode parse( String resource ) 036 throws Exception 037 { 038 return new DependencyGraphParser( "visitor/filtering/" ).parseResource( resource ); 039 } 040 041 @Test 042 public void testFilterCalledWithProperParentStack() 043 throws Exception 044 { 045 DependencyNode root = parse( "parents.txt" ); 046 047 final StringBuilder buffer = new StringBuilder( 256 ); 048 DependencyFilter filter = new DependencyFilter() 049 { 050 public boolean accept( DependencyNode node, List<DependencyNode> parents ) 051 { 052 requireNonNull( node, "node cannot be null" ); 053 requireNonNull( parents, "parents cannot be null" ); 054 for ( DependencyNode parent : parents ) 055 { 056 buffer.append( parent.getDependency().getArtifact().getArtifactId() ); 057 } 058 buffer.append( "," ); 059 return false; 060 } 061 }; 062 063 FilteringDependencyVisitor visitor = new FilteringDependencyVisitor( new PreorderNodeListGenerator(), filter ); 064 root.accept( visitor ); 065 066 assertEquals( ",a,ba,cba,a,ea,", buffer.toString() ); 067 } 068 069}