Add additional tests for assigning to Interface.__module__.

zopefoundation · Mar 16, 2020 · f5299f1 · f5299f1
1 parent 52aa218
commit f5299f1
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/src/zope/interface/tests/test_interface.py b/src/zope/interface/tests/test_interface.py
@@ -1053,6 +1053,13 @@ class ISpam(Interface):
         ISpam.__class__ = MyInterfaceClass
         self.assertEqual(ISpam(1), (1,))
 
+    def test__module__is_readonly(self):
+        inst = self._makeOne()
+        with self.assertRaises((AttributeError, TypeError)):
+            # CPython 2.7 raises TypeError. Everything else
+            # raises AttributeError.
+            inst.__module__ = 'different.module'
+
 
 class InterfaceTests(unittest.TestCase):