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