public void IfGivenThePositionOfAnExistingSheetShouldRemoveThatSheet() { _objectToTest = new SXSSFWorkbook(); _objectToTest.CreateSheet("1"); _objectToTest.CreateSheet("2"); _objectToTest.RemoveSheetAt(0); var sheet = _objectToTest.GetSheetAt(0); Assert.IsTrue(_objectToTest.NumberOfSheets == 1); Assert.AreEqual("2", sheet.SheetName); }