added logging

tests/test_service.py

@@ -1,4 +1,6 @@
 import unittest
+from pathlib import Path
+from tempfile import TemporaryDirectory
 from unittest.mock import patch
 
 from lib._zyxel import normalize_mac
@@ -52,6 +54,20 @@ class NotificationTests(unittest.TestCase):
             timeout=4.0,
         )
 
+    @patch("lib._arrival_detection.send_notification")
+    def test_appends_notification_to_event_log(self, send_notification):
+        with TemporaryDirectory() as directory:
+            event_log = Path(directory) / "arrivals.txt"
+            config = {
+                "notification": {
+                    "enabled": True,
+                    "message": "{name} arrived home",
+                    "event_log": str(event_log),
+                }
+            }
+            _notify(config, {"name": "Ignace", "mac": "aa:bb:cc:dd:ee:ff"})
+            self.assertTrue(event_log.read_text().endswith(" Ignace arrived home\n"))
+
 
 if __name__ == "__main__":
     unittest.main()