diff -u -r1.4 -r1.5
--- SimpleDetectorTest.java	6 Mar 2007 20:22:33 -0000	1.4
+++ SimpleDetectorTest.java	7 Mar 2007 01:07:31 -0000	1.5
@@ -175,6 +175,22 @@

     	path6 = nav.getPath(new BasicHep3Vector(111.0,0,0));
     	assertTrue("/tube1/tube2".equals(path6.toString()));
     }

+	
+	public class VisitorTest 
+	implements IPhysicalVolumeVisitor
+	{
+		public void visit(IPhysicalVolume volume)
+		{
+			System.out.println("visiting node " + volume.getName());
+		}
+	}
+	
+	public void testTraverse()
+	{
+		IPhysicalVolumeNavigator nav = new PhysicalVolumeNavigator(world); 	
+		VisitorTest visitorTest = new VisitorTest();
+		nav.traversePreOrder(visitorTest);
+	}

     
 	public IPhysicalVolume createTestGeometry()
 	{