public void testGetLegendItemSeriesIndex() {
        XYSeriesCollection d1 = new XYSeriesCollection();
        XYSeries s1 = new XYSeries("S1");
        s1.add(1.0, 1.1);
        XYSeries s2 = new XYSeries("S2");
        s2.add(1.0, 1.1);
        d1.addSeries(s1);
        d1.addSeries(s2);

        XYSeriesCollection d2 = new XYSeriesCollection();
        XYSeries s3 = new XYSeries("S3");
        s3.add(1.0, 1.1);
        XYSeries s4 = new XYSeries("S4");
        s4.add(1.0, 1.1);
        XYSeries s5 = new XYSeries("S5");
        s5.add(1.0, 1.1);
        d2.addSeries(s3);
        d2.addSeries(s4);
        d2.addSeries(s5);

        XYAreaRenderer r = new XYAreaRenderer();
        XYPlot plot = new XYPlot(d1, new NumberAxis("x"),
                new NumberAxis("y"), r);
        plot.setDataset(1, d2);
        /*JFreeChart chart =*/ new JFreeChart(plot);
        LegendItem li = r.getLegendItem(1, 2);
        assertEquals("S5", li.getLabel());
        assertEquals(1, li.getDatasetIndex());
        assertEquals(2, li.getSeriesIndex());