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/* ==========================================
* JGraphT : a free Java graph-theory library
* ==========================================
*
* Project Info: http://jgrapht.sourceforge.net/
* Project Creator: Barak Naveh (http://sourceforge.net/users/barak_naveh)
*
* (C) Copyright 2003-2008, by Barak Naveh and Contributors.
*
* 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; either version 2.1 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
/* ------------------------------
* MatrixExporterTest.java
* ------------------------------
* (C) Copyright 2003-2008, by Barak Naveh and Contributors.
*
* Original Author: Charles Fry
*
* $Id: MatrixExporterTest.java 645 2008-09-30 19:44:48Z perfecthash $
*
* Changes
* -------
* 12-Dec-2005 : Initial revision (CF);
*
*/
package org.jgrapht.ext;
import java.io.*;
import junit.framework.*;
import org.jgrapht.*;
import org.jgrapht.graph.*;
/**
* .
*
* @author Charles Fry
*/
public class MatrixExporterTest
extends TestCase
{
//~ Static fields/initializers ---------------------------------------------
private static final String V1 = "v1";
private static final String V2 = "v2";
private static final String V3 = "v3";
private static final String NL = System.getProperty("line.separator");
// TODO jvs 23-Dec-2006: externalized diff-based testing framework
private static final String LAPLACIAN =
"1 1 2" + NL
+ "1 2 -1" + NL
+ "1 3 -1" + NL
+ "2 2 1" + NL
+ "2 1 -1" + NL
+ "3 3 1" + NL
+ "3 1 -1" + NL;
private static final String NORMALIZED_LAPLACIAN =
"1 1 1" + NL
+ "1 2 -0.7071067811865475" + NL
+ "1 3 -0.7071067811865475" + NL
+ "2 2 1" + NL
+ "2 1 -0.7071067811865475" + NL
+ "3 3 1" + NL
+ "3 1 -0.7071067811865475" + NL;
private static final String UNDIRECTED_ADJACENCY =
"1 2 1" + NL
+ "1 3 1" + NL
+ "1 1 2" + NL
+ "2 1 1" + NL
+ "3 1 1" + NL;
private static final String DIRECTED_ADJACENCY =
"1 2 1" + NL
+ "3 1 2" + NL;
private static final MatrixExporter<String, DefaultEdge> exporter =
new MatrixExporter<String, DefaultEdge>();
//~ Methods ----------------------------------------------------------------
public void testLaplacian()
{
UndirectedGraph<String, DefaultEdge> g =
new SimpleGraph<String, DefaultEdge>(DefaultEdge.class);
g.addVertex(V1);
g.addVertex(V2);
g.addEdge(V1, V2);
g.addVertex(V3);
g.addEdge(V3, V1);
StringWriter w = new StringWriter();
exporter.exportLaplacianMatrix(w, g);
assertEquals(LAPLACIAN, w.toString());
w = new StringWriter();
exporter.exportNormalizedLaplacianMatrix(w, g);
assertEquals(NORMALIZED_LAPLACIAN, w.toString());
}
public void testAdjacencyUndirected()
{
UndirectedGraph<String, DefaultEdge> g =
new Pseudograph<String, DefaultEdge>(DefaultEdge.class);
g.addVertex(V1);
g.addVertex(V2);
g.addEdge(V1, V2);
g.addVertex(V3);
g.addEdge(V3, V1);
g.addEdge(V1, V1);
StringWriter w = new StringWriter();
exporter.exportAdjacencyMatrix(w, g);
assertEquals(UNDIRECTED_ADJACENCY, w.toString());
}
public void testAdjacencyDirected()
{
DirectedGraph<String, DefaultEdge> g =
new DirectedMultigraph<String, DefaultEdge>(DefaultEdge.class);
g.addVertex(V1);
g.addVertex(V2);
g.addEdge(V1, V2);
g.addVertex(V3);
g.addEdge(V3, V1);
g.addEdge(V3, V1);
Writer w = new StringWriter();
exporter.exportAdjacencyMatrix(w, g);
assertEquals(DIRECTED_ADJACENCY, w.toString());
}
}
// End MatrixExporterTest.java
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