_book = null;
}
@Test
public void testColumnchart() {
HSSFSheet sheet1 = (HSSFSheet) _book.getSheet("Sheet1");
List<ZssChartX> chartXes = new DrawingManagerImpl(sheet1).getChartXs();
assertEquals(1, chartXes.size());
HSSFChart chart = (HSSFChart) chartXes.get(0).getChartInfo();
assertEquals("2003-2006 Income Summary", chart.getChartTitle());
HSSFSeries[] series = chart.getSeries();