Add Pico communication service

tests/test_pico_core.py

@@ -150,3 +150,81 @@ def test_uart_client_handles_invalid_json():
 
     assert messages[0]["type"] == "error"
     assert messages[0]["message"] == "invalid_json"
+
+
+def test_communication_service_requests_status():
+    from comms.uart_client import UartClient
+    from comms.communication_service import CommunicationService
+
+    fake = FakeUart()
+    state = AppState()
+    service = CommunicationService(UartClient(fake), state)
+
+    service.request_status()
+
+    assert fake.writes == [b'{"type":"status_request"}\n']
+
+
+def test_communication_service_sends_relay_command():
+    from comms.uart_client import UartClient
+    from comms.communication_service import CommunicationService
+
+    fake = FakeUart()
+    state = AppState()
+    service = CommunicationService(UartClient(fake), state)
+
+    service.set_relay("fridge", False)
+
+    assert fake.writes == [b'{"type":"set_relay","relay":"fridge","enabled":false}\n']
+
+
+def test_communication_service_updates_state_from_status():
+    from comms.uart_client import UartClient
+    from comms.communication_service import CommunicationService
+
+    fake = FakeUart()
+    fake.read_chunks = [
+        b'{"type":"status_response","timestamp":99,"battery":{"soc":75},"network":{"uart_connected":true}}\n'
+    ]
+
+    state = AppState()
+    service = CommunicationService(UartClient(fake), state)
+
+    messages = service.poll()
+
+    assert messages[0]["type"] == "status_response"
+    assert state.last_status_timestamp == 99
+    assert state.battery["soc"] == 75
+    assert state.network["uart_connected"] is True
+
+
+def test_communication_service_updates_state_from_relay_response():
+    from comms.uart_client import UartClient
+    from comms.communication_service import CommunicationService
+
+    fake = FakeUart()
+    fake.read_chunks = [
+        b'{"type":"relay_response","relay":"starlink","enabled":true,"ok":true}\n'
+    ]
+
+    state = AppState()
+    service = CommunicationService(UartClient(fake), state)
+
+    service.poll()
+
+    assert state.relays["starlink"] is True
+
+
+def test_communication_service_records_errors():
+    from comms.uart_client import UartClient
+    from comms.communication_service import CommunicationService
+
+    fake = FakeUart()
+    fake.read_chunks = [b'{"type":"error","message":"invalid_json"}\n']
+
+    state = AppState()
+    service = CommunicationService(UartClient(fake), state)
+
+    service.poll()
+
+    assert state.last_error["message"] == "invalid_json"