Fix final_events datetime filtering when splitting override

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Fixed
+
+- Fix schedule final_events datetime filtering when splitting override ([#2715](https://github.com/grafana/oncall/pull/2715))
+
 ## v1.3.21 (2023-08-01)
 
 ### Added

engine/apps/schedules/models/on_call_schedule.py

@@ -789,7 +789,9 @@ def _merge_intervals(evs: ScheduleEvents) -> ScheduleEventIntervals:
 
             if current_interval_idx >= len(intervals):
                 # event outside scheduled intervals, add to resolved
-                resolved.append(ev)
+                # only if still starts before datetime_end
+                if ev["start"] < datetime_end:
+                    resolved.append(ev)
 
             elif ev["start"] < intervals[current_interval_idx][0] and ev["end"] <= intervals[current_interval_idx][0]:
                 # event starts and ends outside an already scheduled interval, add to resolved

engine/apps/schedules/tests/test_on_call_schedule.py

@@ -524,6 +524,88 @@ def test_final_schedule_override_no_priority_shift(
     assert returned_events == expected_events
 
 
+@pytest.mark.django_db
+def test_final_schedule_override_split(
+    make_organization, make_user_for_organization, make_on_call_shift, make_schedule
+):
+    organization = make_organization()
+    schedule = make_schedule(
+        organization,
+        schedule_class=OnCallScheduleWeb,
+        name="test_web_schedule",
+    )
+
+    now = timezone.now().replace(hour=0, minute=0, second=0, microsecond=0)
+    start_date = now - timezone.timedelta(days=7)
+
+    user_a, user_b = (make_user_for_organization(organization, username=i) for i in "AB")
+    # clear users pks <-> organization cache (persisting between tests)
+    memoized_users_in_ical.cache_clear()
+
+    shifts = (
+        # user, priority, start time (h), duration (hs)
+        (user_a, 0, 10, 5),  # 10-15 / A
+    )
+    for user, priority, start_h, duration in shifts:
+        data = {
+            "start": start_date + timezone.timedelta(hours=start_h),
+            "rotation_start": start_date + timezone.timedelta(hours=start_h),
+            "duration": timezone.timedelta(hours=duration),
+            "priority_level": priority,
+            "frequency": CustomOnCallShift.FREQUENCY_DAILY,
+            "schedule": schedule,
+        }
+        on_call_shift = make_on_call_shift(
+            organization=organization, shift_type=CustomOnCallShift.TYPE_ROLLING_USERS_EVENT, **data
+        )
+        on_call_shift.add_rolling_users([[user]])
+
+    # override: 10-14 / B
+    override_start = start_date + timezone.timedelta(hours=10)
+    override_data = {
+        "start": override_start,
+        "rotation_start": override_start,
+        "duration": timezone.timedelta(hours=4),
+        "schedule": schedule,
+    }
+    override = make_on_call_shift(
+        organization=organization, shift_type=CustomOnCallShift.TYPE_OVERRIDE, **override_data
+    )
+    override.add_rolling_users([[user_b]])
+
+    override_started = override_start + timezone.timedelta(seconds=1)
+    returned_events = schedule.final_events(override_started, override_started)
+
+    expected = (
+        # start (h), duration (H), user, priority, is_override
+        (10, 4, "B", None, True),  # 10-14 B
+    )
+    expected_events = [
+        {
+            "calendar_type": 1 if is_override else 0,
+            "end": start_date + timezone.timedelta(hours=start + duration),
+            "is_override": is_override,
+            "priority_level": priority,
+            "start": start_date + timezone.timedelta(hours=start, milliseconds=1 if start == 0 else 0),
+            "user": user,
+        }
+        for start, duration, user, priority, is_override in expected
+    ]
+    returned_events = [
+        {
+            "calendar_type": e["calendar_type"],
+            "end": e["end"],
+            "is_override": e["is_override"],
+            "priority_level": e["priority_level"],
+            "start": e["start"],
+            "user": e["users"][0]["display_name"] if e["users"] else None,
+        }
+        for e in returned_events
+        if not e["is_gap"]
+    ]
+    assert returned_events == expected_events
+
+
 @pytest.mark.django_db
 def test_final_schedule_splitting_events(
     make_organization, make_user_for_organization, make_on_call_shift, make_schedule