public void TestGetAccessors()
{
XSSFWorkbook wb = XSSFTestDataSamples.OpenSampleWorkbook("chart_sheet.xlsx");
XSSFChartSheet sheet = (XSSFChartSheet)wb.GetSheetAt(2);
Assert.IsFalse(sheet.GetEnumerator().MoveNext(),
"Row iterator for charts sheets should return zero rows");
//access to a arbitrary row
Assert.IsNull(sheet.GetRow(1));
//some basic get* accessors
Assert.AreEqual(0, sheet.NumberOfComments);
Assert.AreEqual(0, sheet.NumHyperlinks);
Assert.AreEqual(0, sheet.NumMergedRegions);
Assert.IsNull(sheet.ActiveCell);
Assert.IsTrue(sheet.Autobreaks);
Assert.IsNull(sheet.GetCellComment(0, 0));
Assert.IsNull(sheet.GetCellComment(new CellAddress(0, 0)));
Assert.AreEqual(0, sheet.ColumnBreaks.Length);
Assert.IsTrue(sheet.RowSumsBelow);
Assert.IsNotNull(sheet.CreateDrawingPatriarch());
Assert.IsNotNull(sheet.GetDrawingPatriarch());
Assert.IsNotNull(sheet.GetCTChartsheet());
}