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Sun Jan 12 16:57:18 CET 2014 · https://mail.python.org/pipermail/python-dev/2014-January/131288.html

On 01/12/2014 04:24 AM, Antoine Pitrou wrote:
> On Sat, 11 Jan 2014 23:10:43 -0800
> Ethan Furman <ethan at stoneleaf.us> wrote:
>> On 01/11/2014 05:37 PM, Brett Cannon wrote:
>>>
>>> You're assuming the context manager is doing something magical to verify that all calls in the block raise the expected
>>> exception. What you want to do is execute it in a loop::
>>>
>>>     for test in (...):
>>>       with support.check_warnings(("automatic int conversions have been deprecated", DeprecationWarning), quiet=False):
>>>         exec(test)
>>
>> Well, this is test.support!  I expect magic!  ;)
>>
>> Thanks for setting me straight, got it working.
>
> Or you could, you know, use the new assertWarns():
> http://docs.python.org/dev/library/unittest.html#unittest.TestCase.assertWarns

That's also cool.  If I have to touch that code again I'll switch to it.

--
~Ethan~

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[Python-Dev] test.support.check_warnings