// Test overwriting an existing row
Row row2_ovrewritten = sheet.createRow(1);
Cell cell = row2_ovrewritten.createCell((short) 0);
cell.setCellType(Cell.CELL_TYPE_NUMERIC);
cell.setCellValue((double) 100);
Iterator<Row> it2 = sheet.rowIterator();
assertTrue(it2.hasNext());
assertEquals(row1, it2.next());
assertTrue(it2.hasNext());
Row row2_overwritten_copy = it2.next();
assertEquals(row2_ovrewritten, row2_overwritten_copy);