public void TestXSSFSetArrayFormula_SingleCell()
{
ICellRange <ICell> cells;
XSSFWorkbook workbook = new XSSFWorkbook();
XSSFSheet sheet = (XSSFSheet)workbook.CreateSheet();
// 1. Single-cell array formula
String formula1 = "123";
CellRangeAddress range = CellRangeAddress.ValueOf("C3:C3");
cells = sheet.SetArrayFormula(formula1, range);
Assert.AreEqual(1, cells.Size);
// check GetFirstCell...
XSSFCell firstCell = (XSSFCell)cells.TopLeftCell;
Assert.AreSame(firstCell, sheet.GetFirstCellInArrayFormula(firstCell));
//retrieve the range and check it is the same
Assert.AreEqual(range.FormatAsString(), firstCell.GetArrayFormulaRange().FormatAsString());
ConfirmArrayFormulaCell(firstCell, "C3", formula1, "C3");
}