public void testCloning_QuadrantOrigin() {
        XYPlot p1 = new XYPlot();
        Point2D p = new Point2D.Double(1.2, 3.4);
        p1.setQuadrantOrigin(p);
        XYPlot p2 = null;
        try {
            p2 = (XYPlot) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));
        assertTrue(p2.getQuadrantOrigin() != p);