getActiveSheet()->freezePane($cellSplit, $topLeftCell); $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, $format); // Read written file $reloadedActive = $reloadedSpreadsheet->getActiveSheet(); $actualCellSplit = $reloadedActive->getFreezePane(); $actualTopLeftCell = $reloadedActive->getTopLeftCell(); self::assertSame($cellSplit, $actualCellSplit, 'should be able to set freeze pane'); self::assertSame($topLeftCell, $actualTopLeftCell, 'should be able to set the top left cell'); } }