package edu.uci.ics.jung.visualization;
   
   import edu.uci.ics.jung.algorithms.layout.CircleLayout;
   import edu.uci.ics.jung.graph.SparseGraph;
   import edu.uci.ics.jung.visualization.picking.PickedState;
   import junit.framework.TestCase;
   
   public class BasicVisualizationServerTest extends TestCase {
   
    /*
     * Previously, a bug was introduced where the RenderContext in BasicVisualizationServer was reassigned, resulting
     * in data like pickedVertexState to be lost.
     */
    public void testRenderContextNotOverridden() {
      SparseGraph<Object, Object> graph = new SparseGraph<Object, Object>();
      CircleLayout<Object, Object> layout = new CircleLayout<Object, Object>(graph);
  
      BasicVisualizationServer<Object, Object> server = new BasicVisualizationServer<Object, Object>(layout);
  
      PickedState<Object> pickedVertexState = server.getRenderContext().getPickedVertexState();
      assertNotNull(pickedVertexState);
    }
  }