dnscms: improve venue selection for event occurrences

dnscms/tests/test_events.py

@@ -104,6 +104,34 @@ def test_eventoccurrence_clean_rejects_both_venue_and_venue_custom(event_index,
     assert "venue_custom" in exc.value.message_dict
 
 
+def test_eventoccurrence_clean_promotes_matching_custom_text_to_venue(event_index, venue):
+    event = EventPageFactory(parent=event_index)
+    occurrence = EventOccurrence(
+        event=event,
+        start=timezone.now(),
+        venue_custom=f"  {venue.title}  ",
+    )
+
+    occurrence.clean()
+
+    assert occurrence.venue_id == venue.pk
+    assert occurrence.venue_custom == ""
+
+
+def test_eventoccurrence_clean_keeps_custom_text_when_no_venue_matches(event_index):
+    event = EventPageFactory(parent=event_index)
+    occurrence = EventOccurrence(
+        event=event,
+        start=timezone.now(),
+        venue_custom="  Frederikkeplassen  ",
+    )
+
+    occurrence.clean()
+
+    assert occurrence.venue is None
+    assert occurrence.venue_custom == "Frederikkeplassen"
+
+
 def test_eventoccurrence_clean_requires_venue_or_venue_custom(event_index):
     event = EventPageFactory(parent=event_index)
     occurrence = EventOccurrence(event=event, start=timezone.now())