[Feature]: Bind Home Assistant sensors to storage locations (dryboxes/bins) (#2827)

backend/tests/unit/test_notification_template_sample_data.py

@@ -0,0 +1,26 @@
+"""Every event_type in EVENT_VARIABLES needs a matching SAMPLE_DATA entry.
+
+Regression: location_ha_sensor_alert (#2824) was added to EVENT_VARIABLES but
+never given a SAMPLE_DATA entry. The template preview endpoint falls back to
+an empty sample dict for an event type it has no data for, so every
+{placeholder} in the template silently disappears — "{location}: {sensor} is
+{state}" rendered as just ": is " with nothing to say what did what.
+"""
+
+from backend.app.schemas.notification_template import EVENT_VARIABLES, SAMPLE_DATA
+
+
+def test_every_event_type_has_sample_data():
+    missing = sorted(set(EVENT_VARIABLES) - set(SAMPLE_DATA))
+    assert missing == [], f"EVENT_VARIABLES entries with no SAMPLE_DATA: {missing}"
+
+
+def test_sample_data_covers_every_variable_its_event_type_declares():
+    # A partial sample (declared variable missing a sample value) produces
+    # the same silent-blank symptom as a missing sample entirely.
+    incomplete = {
+        event_type: sorted(set(variables) - set(SAMPLE_DATA.get(event_type, {})))
+        for event_type, variables in EVENT_VARIABLES.items()
+    }
+    incomplete = {k: v for k, v in incomplete.items() if v}
+    assert incomplete == {}, f"Event types with variables missing from their sample data: {incomplete}"