IComparisonOperation unsupportedOperation = new LongLessCO();
criteria.setComparisonOperation(unsupportedOperation);
assertEquals(Criteria.ERR_OPERATION_NOT_SUPPORTED, criteria.validate());
IComparisonOperation supportedOperation = new StringEqualsCO();
criteria.setComparisonOperation(supportedOperation);
assertEquals(IProperty.ERROR_VALUE_NOT_SPECIFIED, criteria.validate());
criteria.setValue("a");
assertNull(criteria.validate());