Fix iot strip turn on and off from parent (#639)

Co-authored-by: Steven B <51370195+sdb9696@users.noreply.github.com>

kasa/iot/iotstrip.py

@@ -161,11 +161,17 @@ class IotStrip(IotDevice):
 
     async def turn_on(self, **kwargs) -> dict:
         """Turn the strip on."""
-        return await self._query_helper("system", "set_relay_state", {"state": 1})
+        for plug in self.children:
+            if plug.is_off:
+                await plug.turn_on()
+        return {}
 
     async def turn_off(self, **kwargs) -> dict:
         """Turn the strip off."""
-        return await self._query_helper("system", "set_relay_state", {"state": 0})
+        for plug in self.children:
+            if plug.is_on:
+                await plug.turn_off()
+        return {}
 
     @property  # type: ignore
     @requires_update

tests/fakeprotocol_iot.py

@@ -308,10 +308,6 @@ class FakeIotTransport(BaseTransport):
             child_ids = []
         _LOGGER.debug("Setting relay state to %s", x["state"])
 
-        if not child_ids and "children" in self.proto["system"]["get_sysinfo"]:
-            for child in self.proto["system"]["get_sysinfo"]["children"]:
-                child_ids.append(child["id"])
-
         _LOGGER.info("child_ids: %s", child_ids)
         if child_ids:
             for child in self.proto["system"]["get_sysinfo"]["children"]:

tests/iot/test_iotdevice.py

@@ -137,8 +137,9 @@ async def test_query_helper(dev):
 @device_iot
 @turn_on
 async def test_state(dev, turn_on):
-    await handle_turn_on(dev, turn_on)
     orig_state = dev.is_on
+    await handle_turn_on(dev, turn_on)
+    await dev.update()
     if orig_state:
         await dev.turn_off()
         await dev.update()

tests/test_feature.py

@@ -5,6 +5,7 @@ import pytest
 from pytest_mock import MockerFixture
 
 from kasa import Device, Feature, KasaException
+from kasa.iot import IotStrip
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -168,7 +169,10 @@ async def test_feature_setters(dev: Device, mocker: MockerFixture):
         if feat.attribute_setter is None:
             return
 
-        expecting_call = feat.id not in internal_setters
+        # IotStrip makes calls via it's children
+        expecting_call = feat.id not in internal_setters and not isinstance(
+            dev, IotStrip
+        )
 
         if feat.type == Feature.Type.Number:
             await feat.set_value(feat.minimum_value)