@Test
 public void trigger_getRRULE_recurrencesNotEmpty_ReturnsTrue() {
   Trigger trigger = new Trigger();
   trigger.setRecurrences("RRULE:FREQ=DAILY");
   assertEquals(trigger.getRRULE(), "FREQ=DAILY");
 }
 @Test
 public void trigger_getRRULE_recurrencesEmpty_ReturnsTrue() {
   Trigger trigger = new Trigger();
   assertEquals(trigger.getRRULE(), "");
 }