public void Bug51158a()
{
// create a workbook
XSSFWorkbook workbook = new XSSFWorkbook();
workbook.CreateSheet("Test Sheet");
XSSFSheet sheetBack = workbook.GetSheetAt(0) as XSSFSheet;
// Committing twice did add the XML twice without Clearing the part in between
sheetBack.Commit();
// ensure that a memory based package part does not have lingering data from previous Commit() calls
if (sheetBack.GetPackagePart() is MemoryPackagePart)
{
((MemoryPackagePart)sheetBack.GetPackagePart()).Clear();
}
sheetBack.Commit();
String str = Encoding.UTF8.GetString(IOUtils.ToByteArray(sheetBack.GetPackagePart().GetInputStream()));
//System.out.Println(str);
Assert.AreEqual(1, countMatches(str, "<worksheet"));
}