core: services: wifi: WifiManager: Add missing iface test

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Author: patrickelectric

core/services/wifi/test_WifiManager.py

@@ -0,0 +1,29 @@
+import sys
+from argparse import Namespace
+from pathlib import Path
+from unittest.mock import patch
+
+import pytest
+
+_saved = {name: sys.modules.get(name) for name in ("exceptions", "settings", "typedefs")}
+sys.path.insert(0, str(Path(__file__).absolute().parent))
+for name in _saved:
+    sys.modules.pop(name, None)
+from wifi_handlers.wpa_supplicant.WifiManager import WifiManager
+
+for name, module in _saved.items():
+    if module is not None:
+        sys.modules[name] = module
+    else:
+        sys.modules.pop(name, None)
+
+
+@pytest.mark.asyncio
+async def test_missing_iface_returns_unavailable_and_empty_lists() -> None:
+    manager = WifiManager()
+    manager.configure(Namespace(socket_name="wlan0"))
+    with patch("wifi_handlers.wpa_supplicant.WifiManager.os.path.exists", return_value=False):
+        status = await manager.status()
+        assert status.state == "unavailable"
+        assert await manager.get_saved_wifi_network() == []
+        assert await manager.get_wifi_available() == []