wren node writes the house brightness from lights.set/dim/brighten (wren s11)

backend/tests/flow/test_wren.py

@@ -307,3 +307,25 @@ def test_a_question_for_a_temperature_is_answered_from_its_reading(fake_wren):
         command = f"how warm is it in the {area}"
         out = node.execute({"house.command": command, **readings})
         assert out == {"house.unhandled": command, "house.reply": CANT}
+
+
+def test_a_brightness_call_sets_the_house_brightness(fake_wren):
+    node = _speaking(("brightness", DType.INT))
+    # Whatever area the call names: the brightness is the house's.
+    for call, level in [
+        (FakeCall("lights.set", {"id": "kitchen:light", "level": 30}), 30),
+        (FakeCall("lights.dim", {"id": "kitchen:light"}), 40),
+        (FakeCall("lights.brighten", {"id": "bedroom:light"}), 100),
+    ]:
+        fake_wren.answer = ([call], 0.95)
+        out = node.execute({"house.command": "dim the lights in the kitchen"})
+        assert out == {
+            "house.brightness": level,
+            "house.reply": f"Brightness at {level} percent.",
+        }
+
+    # Nothing wired for it: the assistant's.
+    node = _speaking(("kitchen_light", DType.BOOL))
+    fake_wren.answer = ([FakeCall("lights.dim", {"id": "kitchen:light"})], 0.95)
+    out = node.execute({"house.command": "dim the lights"})
+    assert out == {"house.unhandled": "dim the lights", "house.reply": CANT}