public void TestAutoFilter()
{
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sh = (HSSFSheet)wb.CreateSheet();
InternalWorkbook iwb = wb.Workbook;
InternalSheet ish = sh.Sheet;
Assert.IsNull(iwb.GetSpecificBuiltinRecord(NameRecord.BUILTIN_FILTER_DB, 1));
Assert.IsNull(ish.FindFirstRecordBySid(AutoFilterInfoRecord.sid));
CellRangeAddress range = CellRangeAddress.ValueOf("A1:B10");
sh.SetAutoFilter(range);
NameRecord name = iwb.GetSpecificBuiltinRecord(NameRecord.BUILTIN_FILTER_DB, 1);
Assert.IsNotNull(name);
// The built-in name for auto-filter must consist of a single Area3d Ptg.
Ptg[] ptg = name.NameDefinition;
Assert.AreEqual(1, ptg.Length, "The built-in name for auto-filter must consist of a single Area3d Ptg");
Assert.IsTrue(ptg[0] is Area3DPtg, "The built-in name for auto-filter must consist of a single Area3d Ptg");
Area3DPtg aref = (Area3DPtg)ptg[0];
Assert.AreEqual(range.FirstColumn, aref.FirstColumn);
Assert.AreEqual(range.FirstRow, aref.FirstRow);
Assert.AreEqual(range.LastColumn, aref.LastColumn);
Assert.AreEqual(range.LastRow, aref.LastRow);
// verify AutoFilterInfoRecord
AutoFilterInfoRecord afilter = (AutoFilterInfoRecord)ish.FindFirstRecordBySid(AutoFilterInfoRecord.sid);
Assert.IsNotNull(afilter);
Assert.AreEqual(2, afilter.NumEntries); //filter covers two columns
HSSFPatriarch dr = (HSSFPatriarch)sh.DrawingPatriarch;
Assert.IsNotNull(dr);
HSSFSimpleShape comboBoxShape = (HSSFSimpleShape)dr.Children[0];
Assert.AreEqual(comboBoxShape.ShapeType, HSSFSimpleShape.OBJECT_TYPE_COMBO_BOX);
Assert.IsNull(ish.FindFirstRecordBySid(ObjRecord.sid)); // ObjRecord will appear after serializetion
wb = HSSFTestDataSamples.WriteOutAndReadBack(wb);
sh = (HSSFSheet)wb.GetSheetAt(0);
ish = sh.Sheet;
ObjRecord objRecord = (ObjRecord)ish.FindFirstRecordBySid(ObjRecord.sid);
IList subRecords = objRecord.SubRecords;
Assert.AreEqual(3, subRecords.Count);
Assert.IsTrue(subRecords[0] is CommonObjectDataSubRecord);
Assert.IsTrue(subRecords[1] is FtCblsSubRecord); // must be present, see Bug 51481
Assert.IsTrue(subRecords[2] is LbsDataSubRecord);
}