fail("Should throw FessSystemException");
        } catch (FessSystemException e) {
            assertEquals("Invalid format: -1:30", e.getMessage());
        }
    }

    public void test_intervalRule_getDelay() {
        IntervalRule rule = new IntervalRule("10:00", "18:00", "*", 5000);
        assertEquals(5000, rule.getDelay());

        rule = new IntervalRule("10:00", "18:00", "*", 0);