.

wcfs/internal/xbtree_test.py

@@ -31,6 +31,7 @@ from ZODB.MappingStorage import MappingStorage
 from ZODB import DB
 from persistent import Persistent
 import transaction
+from pytest import raises
 inf = float('inf')
 
 
@@ -453,6 +454,9 @@ def test_restructure():
     R(z, 'T/B')
     assert crack_btree(z) == (BTREE_EMPTY, [], [])
 
+    with raises(ValueError, match="new keys != old keys"):
+        R(z, 'T/B1')
+
     # ø -> T/T/B    (don't - we don't emit topologies with empty buckets for
     #                tests since ZODB breaks on them)
     """
@@ -499,7 +503,7 @@ def test_restructure():
     R(z, 'T/B1')
     assert crack_btree(z) == (BTREE_ONE, ((1, X[1]),), None)
     R(z, 'T/T/B1')
-    1/0
+
 
 
     # tree with one not-yet committed bucket