### Question:
ParseLong implements IsParser<Long> { @Override public void setCell(Long o, Cell cell, Field field) { if (o != null) { cell.setCellValue(o); } }  @Override Long parse(Object o, Field field); @Override void setCell(Long o, Cell cell, Field field);  }### Answer:
@Test public void setCell() throws Exception { Cell cell = CellGenerateUtil.create(); parseLong.setCell(null, cell, null); assertEquals("", cell.getStringCellValue()); parseLong.setCell(Double.valueOf(expected).longValue(), cell, null); assertEquals(Double.valueOf(expected).longValue(), cell.getNumericCellValue(), 0); }