Add hardware-free Pico core tests

tests/test_pico_core.py

@@ -0,0 +1,80 @@
+import sys
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+PICO = ROOT / "pico-dashboard"
+sys.path.insert(0, str(PICO))
+
+from comms.protocol import make_status_request, make_set_relay
+from state.app_state import AppState
+from alarms.alarm_manager import AlarmManager
+from ui.screen_manager import ScreenManager
+
+
+def test_protocol_messages():
+    assert make_status_request() == {"type": "status_request"}
+
+    assert make_set_relay("starlink", True) == {
+        "type": "set_relay",
+        "relay": "starlink",
+        "enabled": True,
+    }
+
+
+def test_app_state_status_update():
+    state = AppState()
+
+    state.update_from_status({
+        "timestamp": 123,
+        "battery": {"soc": 82, "voltage": 13.2},
+        "temps": {"fridge_zone_1": 34.5},
+        "sensor_health": {"fridge_zone_1": True},
+        "relays": {"starlink": True},
+        "vehicle": {"ignition_on": False},
+        "network": {"uart_connected": True},
+    })
+
+    assert state.last_status_timestamp == 123
+    assert state.battery["soc"] == 82
+    assert state.temps["fridge_zone_1"] == 34.5
+    assert state.sensor_health["fridge_zone_1"] is True
+    assert state.relays["starlink"] is True
+    assert state.network["uart_connected"] is True
+
+
+def test_alarm_manager():
+    state = AppState()
+    state.update_from_status({
+        "battery": {"soc": 10, "voltage": 11.8},
+        "temps": {"fridge_zone_1": 45.0, "fridge_zone_2": 35.0},
+        "sensor_health": {
+            "fridge_zone_1": True,
+            "fridge_zone_2": True,
+            "rear_seat": False,
+            "outside": True,
+        },
+        "network": {"uart_connected": False},
+    })
+
+    alarms = AlarmManager().evaluate(state)
+
+    assert "battery_soc_low" in alarms
+    assert "battery_voltage_low" in alarms
+    assert "fridge_zone_1_high" in alarms
+    assert "communication_lost" in alarms
+    assert "sensor_failure:rear_seat" in alarms
+
+
+def test_screen_manager():
+    screens = ScreenManager()
+
+    assert screens.current_screen == "dashboard"
+
+    screens.go_to("battery")
+    assert screens.current_screen == "battery"
+
+    screens.next_screen()
+    assert screens.current_screen == "temps"
+
+    screens.previous_screen()
+    assert screens.current_screen == "battery"