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Code Issues Releases Wiki Activity

Added more tests for issue #27122.

This commit is contained in:
Serhiy Storchaka 2016-06-20 05:30:31 +03:00
parent b84f029baa ce1a9f309f
commit 9a573a0c23
1 changed files with 10 additions and 4 deletions
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14
Lib/test/test_contextlib.py
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@ -796,8 +796,9 @@ class TestExitStack(unittest.TestCase):
self.assertIs(stack._exit_callbacks[-1], cm)
def test_dont_reraise_RuntimeError(self):
"""https://bugs.python.org/issue27122"""
# https://bugs.python.org/issue27122
class UniqueException(Exception): pass
class UniqueRuntimeError(RuntimeError): pass
@contextmanager
def second():
@ -813,15 +814,20 @@ class TestExitStack(unittest.TestCase):
except Exception as exc:
raise exc
# The RuntimeError should be caught by second()'s exception
# The UniqueRuntimeError should be caught by second()'s exception
# handler which chain raised a new UniqueException.
with self.assertRaises(UniqueException) as err_ctx:
with ExitStack() as es_ctx:
es_ctx.enter_context(second())
es_ctx.enter_context(first())
raise RuntimeError("please no infinite loop.")
raise UniqueRuntimeError("please no infinite loop.")
self.assertEqual(err_ctx.exception.args[0], "new exception")
exc = err_ctx.exception
self.assertIsInstance(exc, UniqueException)
self.assertIsInstance(exc.__context__, UniqueRuntimeError)
self.assertIsNone(exc.__context__.__context__)
self.assertIsNone(exc.__context__.__cause__)
self.assertIs(exc.__cause__, exc.__context__)
class TestRedirectStream: