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PEP 415: Implement suppression of __context__ display with an exception attribute

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This replaces the original PEP 409 implementation. See #14133.
This commit is contained in:
Benjamin Peterson 2012-05-14 22:09:31 -07:00
parent d91dc62379
commit d5a1c44455
12 changed files with 80 additions and 79 deletions
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15
Lib/test/test_exceptions.py
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@ -388,18 +388,18 @@ class ExceptionTests(unittest.TestCase):
def testChainingAttrs(self):
e = Exception()
self.assertIsNone(e.__context__)
self.assertIs(e.__cause__, Ellipsis)
self.assertIsNone(e.__cause__)
e = TypeError()
self.assertIsNone(e.__context__)
self.assertIs(e.__cause__, Ellipsis)
self.assertIsNone(e.__cause__)
class MyException(EnvironmentError):
pass
e = MyException()
self.assertIsNone(e.__context__)
self.assertIs(e.__cause__, Ellipsis)
self.assertIsNone(e.__cause__)
def testChainingDescriptors(self):
try:
@ -408,15 +408,16 @@ class ExceptionTests(unittest.TestCase):
e = exc
self.assertIsNone(e.__context__)
self.assertIs(e.__cause__, Ellipsis)
self.assertIsNone(e.__cause__)
self.assertFalse(e.__suppress_context__)
e.__context__ = NameError()
e.__cause__ = None
self.assertIsInstance(e.__context__, NameError)
self.assertIsNone(e.__cause__)
e.__cause__ = Ellipsis
self.assertIs(e.__cause__, Ellipsis)
self.assertTrue(e.__suppress_context__)
e.__suppress_context__ = False
self.assertFalse(e.__suppress_context__)
def testKeywordArgs(self):
# test that builtin exception don't take keyword args,