public void testSetSeriesURLGenerator() {
        CategoryPlot plot = (CategoryPlot) this.chart.getPlot();
        CategoryItemRenderer renderer = plot.getRenderer();
        StandardCategoryURLGenerator url1
                = new StandardCategoryURLGenerator();
        renderer.setSeriesItemURLGenerator(0, url1);
        CategoryURLGenerator url2 = renderer.getItemURLGenerator(0, 0);
        assertTrue(url2 == url1);