Thomas Wouters pointed out that _Abstract.__new__ should use super().__new__()
instead of going straight to object.__new__().
diff --git a/Lib/test/test_abc.py b/Lib/test/test_abc.py
index f93f3d3..008d839 100644
--- a/Lib/test/test_abc.py
+++ b/Lib/test/test_abc.py
@@ -130,6 +130,20 @@
self.failUnless(issubclass(MyInt, A))
self.failUnless(isinstance(42, A))
+ def test_all_new_methods_are_called(self):
+ class A(metaclass=abc.ABCMeta):
+ pass
+ class B:
+ counter = 0
+ def __new__(cls):
+ B.counter += 1
+ return super().__new__(cls)
+ class C(A, B):
+ pass
+ self.assertEqual(B.counter, 0)
+ C()
+ self.assertEqual(B.counter, 1)
+
def test_main():
test_support.run_unittest(TestABC)