mail notification

tests/sync/fakes.py

@@ -28,3 +28,11 @@ class FakeGarminUploader:
         if self.error is not None:
             raise self.error
         return self.result
+
+
+class FakeNotifier:
+    def __init__(self) -> None:
+        self.sent: list[dict] = []
+
+    def send(self, *, to_address: str, subject: str, body: str) -> None:
+        self.sent.append({"to_address": to_address, "subject": subject, "body": body})