add blocker presets

backend/tests/test_settings_service.py

@@ -2,10 +2,34 @@
 
 from __future__ import annotations
 
-from app.services import settings_service
+from app.services import pomodoro, settings_service
 from app.settings_schema import SECRET_MASK
 
 
+def test_a_preset_change_resizes_the_running_interval(session, settings):
+    row = pomodoro.start(session, settings, kind="work")
+    assert row.planned_seconds == settings.pomodoro.work_minutes * 60
+
+    updated = settings_service.apply_patch(
+        session, {"pomodoro": {"work_minutes": 85, "short_break_minutes": 10}}
+    )
+
+    current = pomodoro.current_session(session)
+    assert current.id == row.id
+    assert current.planned_seconds == 85 * 60
+    # Elapsed time is wall-clock, not stored — resizing never has to touch it.
+    assert pomodoro.elapsed_seconds(current) >= 0
+    assert updated.pomodoro.work_minutes == 85
+
+
+def test_a_patch_unrelated_to_durations_leaves_the_running_interval_alone(session, settings):
+    row = pomodoro.start(session, settings, kind="work")
+    settings_service.apply_patch(session, {"pomodoro": {"daily_goal_pomodoros": 12}})
+    current = pomodoro.current_session(session)
+    assert current.id == row.id
+    assert current.planned_seconds == row.planned_seconds
+
+
 def test_patch_merges_without_clobbering_siblings(session):
     settings_service.apply_patch(session, {"pomodoro": {"work_minutes": 50}})
     updated = settings_service.apply_patch(