Ticket #27198: 27198-test.diff

tests/httpwrappers/tests.py

@@ -258 +258 @@
         x.update(y)
         self.assertEqual(x.getlist('a'), ['1', '2', '3', '4'])
 
+    def test_getlist_doesnt_mutate(self):
+        x = QueryDict("a=1&a=2&b=3")
+        values = x.getlist('a')
+        values += x.getlist('b')
+        self.assertEqual(x.getlist('a'), ['1', '2'])
+
     def test_non_default_encoding(self):
         """#13572 - QueryDict with a non-default encoding"""
         q = QueryDict(str('cur=%A4'), encoding='iso-8859-15')