### Question:
DateTimeParam extends AbstractParam<Date> { @Override public String toString() { return DateUtility.convertDateToXSDString(getValue()); } DateTimeParam(String param); @Override String toString();  }### Answer:
@Test public void testToString() { DateTimeParam param = new DateTimeParam(EPOCH_DT); assertEquals("1970-01-01T00:00:00Z", param.toString()); }