public String getValue() {
		if (period == null) {
			final DateFormat dateFormat = I18N.createDateFormat();
			return dateFormat.format(startDate) + CUSTOM_PERIOD_SEPARATOR
					+ dateFormat.format(endDate);
		}
		return period.getCode();
	}
@Test
	public void testGetValue() {
		assertNotNull("getValue", periodRange.getValue());
		assertNotNull("getValue", customRange.getValue());
	}