[fix] metaclass conflict for class_deprecated

Actually the old compatibility code actually prevented this bug so back it up.

1 files changed, 11 insertions, 0 deletions

diff --git a/test/unittest_deprecation.py b/test/unittest_deprecation.py
index 096978e..172b9fb 100644
--- a/test/unittest_deprecation.py
+++ b/test/unittest_deprecation.py
@@ -61,6 +61,17 @@ class RawInputTC(TestCase):
         self.assertEqual(self.messages,
                          ['[logilab.common] OldClass is deprecated, use AnyClass instead'])
 
+    def test_class_renamed_conflict_metaclass(self):
+        class SomeMetaClass(type):
+            pass
+
+        class AnyClass(metaclass=SomeMetaClass):
+            pass
+
+        # make sure the "metaclass conflict: the metaclass of a derived class # must be a
+        # (non-strict) subclass of the metaclasses of all its bases" exception won't be raised
+        deprecation.class_renamed("OldClass", AnyClass)
+
     def test_class_moved(self):
         class AnyClass(object):
             pass