Issue #23661: unittest.mock side_effects can now be exceptions again.

This was a regression vs Python 3.4. Patch from Ignacio Rossi

1 files changed, 2 insertions, 1 deletions

diff --git a/Lib/unittest/mock.py b/Lib/unittest/mock.py
index c3ab4e82e8..191a175a41 100644
--- a/Lib/unittest/mock.py
+++ b/Lib/unittest/mock.py
@@ -506,7 +506,8 @@ class NonCallableMock(Base):
         if delegated is None:
             return self._mock_side_effect
         sf = delegated.side_effect
-        if sf is not None and not callable(sf) and not isinstance(sf, _MockIter):
+        if (sf is not None and not callable(sf)
+                and not isinstance(sf, _MockIter) and not _is_exception(sf)):
             sf = _MockIter(sf)
             delegated.side_effect = sf
         return sf