From ce1a9f309fd5b88e2792a8e31c237412fc163d28 Mon Sep 17 00:00:00 2001 From: Serhiy Storchaka Date: Mon, 20 Jun 2016 05:29:54 +0300 Subject: [PATCH] Added more tests for issue #27122. --- Lib/test/test_contextlib.py | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/Lib/test/test_contextlib.py b/Lib/test/test_contextlib.py index a246c43187f..516403ef655 100644 --- a/Lib/test/test_contextlib.py +++ b/Lib/test/test_contextlib.py @@ -763,8 +763,9 @@ 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(): @@ -780,15 +781,20 @@ 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: