PY-10988 Instance attribute defined outside __init__ with property setter

python/testData/quickFixes/PyMoveAttributeToInitQuickFixTest/propertyNegative.py

@@ -0,0 +1,24 @@
+class FavouriteManager(object):
+    """Favourite manager"""
+
+    def __init__(self, session):
+        self._session = session
+
+    @property
+    def _favourite_ids(self):
+        """Get favourites"""
+        try:
+            return map(int, self._session.get('favourite', '').split(','))
+        except ValueError:
+            return []
+
+    @_favourite_ids.setter
+    def _favourite_ids(self, ids):
+        """Set favourites ids"""
+        self._session['favourite'] = ','.join(set(ids))
+
+    def add(self, estate):
+        """Add estate to favourite"""
+        ids = self._favourite_ids
+        ids.append(estate.id)
+        self._favourite_ids = ids