Test incomplete alarms

src/icalendar/alarms.py

@@ -329,8 +329,8 @@ def _repeat(self, first: datetime, alarm: Alarm) -> Generator[datetime]:
         """The times when the alarm is triggered relative to start."""
         yield first # we trigger at the start
         repeat = alarm.REPEAT
-        if repeat:
-            duration = alarm.DURATION
+        duration = alarm.DURATION
+        if repeat and duration:
             for i in range(1, repeat + 1):
                 yield self._add(first, duration * i)
 

src/icalendar/tests/test_issue_716_alarm_time_computation.py

@@ -65,9 +65,19 @@ def test_absolute_alarm_time_with_vDatetime(alarm):
     assert times[0].trigger == EXAMPLE_TRIGGER
 
 
-def test_alarm_has_only_one_of_repeat_or_duration():
+alarm_incomplete_1 = Alarm()
+alarm_incomplete_1.TRIGGER = timedelta(hours=2)
+alarm_incomplete_1.DURATION = timedelta(hours=1)
+alarm_incomplete_2 = Alarm()
+alarm_incomplete_2.TRIGGER = timedelta(hours=2)
+alarm_incomplete_2.REPEAT = 100
+
+@pytest.mark.parametrize("alarm", [alarm_incomplete_1, alarm_incomplete_2])
+def test_alarm_has_only_one_of_repeat_or_duration(alarm):
     """This is an edge case and we should ignore the repetition."""
-    pytest.skip("TODO")
+    a = Alarms(alarm)
+    a.set_start(datetime(2027, 12, 2))
+    assert len(a.times) == 1
 
 
 @pytest.fixture(params=[(0, timedelta(minutes=-30)), (1, timedelta(minutes=-25))])