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bpo-31177: Fix reset_mock on mock with deleted children #10836

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bpo-31177: Fix reset_mock on mock with deleted children #10836

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2 changes: 2 additions & 0 deletions Lib/unittest/mock.py
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Original file line number Diff line number Diff line change
Expand Up @@ -544,6 +544,8 @@ def reset_mock(self, visited=None,*, return_value=False, side_effect=False):
for child in self._mock_children.values():
if isinstance(child, _SpecState):
continue
if child is _deleted:
continue
child.reset_mock(visited)

ret = self._mock_return_value
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8 changes: 6 additions & 2 deletions Lib/unittest/test/testmock/testmock.py
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Expand Up @@ -202,11 +202,13 @@ def test_java_exception_side_effect(self):

def test_reset_mock(self):
parent = Mock()
spec = ["something"]
spec = ["something", "deleted"]
mock = Mock(name="child", parent=parent, spec=spec)
mock(sentinel.Something, something=sentinel.SomethingElse)
something = mock.something
mock.something()
mock.deleted
del mock.deleted
mock.side_effect = sentinel.SideEffect
return_value = mock.return_value
return_value()
Expand Down Expand Up @@ -234,10 +236,12 @@ def test_reset_mock(self):
self.assertEqual(mock.return_value, return_value,
"return_value incorrectly reset")
self.assertFalse(return_value.called, "return value mock not reset")
self.assertEqual(mock._mock_children, {'something': something},
self.assertEqual(list(mock._mock_children), ['something', 'deleted'],
"children reset incorrectly")
self.assertEqual(mock.something, something,
"children incorrectly cleared")
with self.assertRaises(AttributeError, msg="deleted attribute incorrectly restored"):
mock.deleted
self.assertFalse(mock.something.called, "child not reset")


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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2018-11-30-03-23-06.bpo-31177.hp4sp9.rst
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@@ -0,0 +1,2 @@
unittest.mock: reset_mock() now works on Mock objects that had attributes
deleted.