### Question:
ParseInt implements IsParser<Integer> { @Override public void setCell(Integer o, Cell cell, Field field) { if (o != null) { cell.setCellValue(o); } }  @Override Integer parse(Object o, Field field); @Override void setCell(Integer o, Cell cell, Field field);  }### Answer:
@Test public void setCell() throws Exception { Cell cell = CellGenerateUtil.create(); parseInt.setCell(null, cell, null); assertEquals("", cell.getStringCellValue()); parseInt.setCell(expected, cell, null); assertEquals(Double.valueOf(expected.toString()), cell.getNumericCellValue(), 0.01); }