Alpha stage commit

tests/test_source_updates.py

@@ -0,0 +1,22 @@
+from __future__ import annotations
+
+from app.models import Source
+from app.source_updates import _recover_missing_managed_cache_url
+
+
+def test_missing_managed_cache_source_recovers_seed_url_for_online_update():
+    source = Source(
+        id=3,
+        name="Geofabrik Berlin OSM PBF",
+        kind="osm_pbf",
+        url="data/sources/source_3/1782478365.osm.pbf",
+        country="DE",
+    )
+
+    recovery = _recover_missing_managed_cache_url(source)
+
+    assert recovery == {
+        "previous_url": "data/sources/source_3/1782478365.osm.pbf",
+        "url": "https://download.geofabrik.de/europe/germany/berlin-latest.osm.pbf",
+    }
+    assert source.url == "https://download.geofabrik.de/europe/germany/berlin-latest.osm.pbf"