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Issue #22138: Fix mock.patch behavior when patching descriptors. Restore

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original values after patching.

Patch contributed by Sean McCully.
This commit is contained in:
Senthil Kumaran 2016-01-08 23:43:29 -08:00
parent cbe6356c42
commit 81bc927da7
3 changed files with 33 additions and 1 deletions
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26
Lib/unittest/test/testmock/testpatch.py
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@ -1817,5 +1817,31 @@ class PatchTest(unittest.TestCase):
self.assertEqual(stopped, ["three", "two", "one"])
def test_special_attrs(self):
def foo(x=0):
"""TEST"""
return x
with patch.object(foo, '__defaults__', (1, )):
self.assertEqual(foo(), 1)
self.assertEqual(foo(), 0)
with patch.object(foo, '__doc__', "FUN"):
self.assertEqual(foo.__doc__, "FUN")
self.assertEqual(foo.__doc__, "TEST")
with patch.object(foo, '__module__', "testpatch2"):
self.assertEqual(foo.__module__, "testpatch2")
self.assertEqual(foo.__module__, 'unittest.test.testmock.testpatch')
with patch.object(foo, '__annotations__', dict([('s', 1, )])):
self.assertEqual(foo.__annotations__, dict([('s', 1, )]))
self.assertEqual(foo.__annotations__, dict())
def foo(*a, x=0):
return x
with patch.object(foo, '__kwdefaults__', dict([('x', 1, )])):
self.assertEqual(foo(), 1)
self.assertEqual(foo(), 0)
if __name__ == '__main__':
unittest.main()