public void testProperty() {
        Partial test = createHourMinPartial();
        assertNotNull(test.property(DateTimeFieldType.hourOfDay()));
        assertNotNull(test.property(DateTimeFieldType.minuteOfHour()));
        try {
            test.property(DateTimeFieldType.secondOfDay());
            fail();
        } catch (IllegalArgumentException ex) {}
        try {
            test.property(null);
            fail();
        } catch (IllegalArgumentException ex) {}
    }