@Test
public void testXlsxCharts() throws Exception {
BandData root = new BandData("Root", null, BandOrientation.HORIZONTAL);
root.addChild(new BandData("Header", root, BandOrientation.HORIZONTAL));
Random random = new Random();
for (int i = 1; i <= 10; i++) {
BandData band = new BandData("Band", root, BandOrientation.HORIZONTAL);
band.addData("i", i);