public void testEDateIncrease() {
EDate eDate = new EDate();
Date startDate = new Date();
int offset = 2;
NumberEval result = (NumberEval) eDate.evaluate(new ValueEval[]{new NumberEval(DateUtil.getExcelDate(startDate)), new NumberEval(offset)}, null);
Date resultDate = DateUtil.getJavaDate(result.getNumberValue());
Calendar instance = Calendar.getInstance();
instance.setTime(startDate);
instance.add(Calendar.MONTH, offset);
assertEquals(resultDate, instance.getTime());