assertFalse(crossRule.isTarget(1, 30, 8)); // Should be treated as day 1 (Sunday), checking day+1=2 (Monday)
    }

    @Test
    public void test_addIntervalRule_multipleDays() {
        IntervalControlHelper helper = new IntervalControlHelper();
        helper.addIntervalRule("10:00", "18:00", "1,2,3,4,5", 1000);

        assertEquals(1, helper.ruleList.size());