/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.graph.util;
import junit.framework.TestCase;
import org.geotools.graph.GraphTestUtil;
import org.geotools.graph.build.GraphBuilder;
import org.geotools.graph.build.basic.BasicGraphBuilder;
import org.geotools.graph.util.graph.CycleDetector;
/**
*
*
* @source $URL$
*/
public class CycleDetectorTest extends TestCase {
private GraphBuilder m_builder;
public CycleDetectorTest(String name) {
super(name);
}
protected void setUp() throws Exception {
super.setUp();
m_builder = createBuilder();
}
/**
* Create a graph without a cycle. <BR>
* <BR>
* Expected: 1. containsCycle() returns false
*/
public void test_0() {
GraphTestUtil.buildNoBifurcations(builder(), 100);
CycleDetector detector = new CycleDetector(builder().getGraph());
assertTrue(!detector.containsCycle());
}
/**
* Create a graph that contains a cycle. <BR>
* <BR>
* Expected: 1. containsCycle returns true
*/
public void test_1() {
GraphTestUtil.buildCircular(builder(), 100);
CycleDetector detector = new CycleDetector(builder().getGraph());
assertTrue(detector.containsCycle());
}
protected GraphBuilder createBuilder() {
return(new BasicGraphBuilder());
}
protected GraphBuilder builder() {
return(m_builder);
}
}