[New-bugs-announce] [issue15891] A public facing API for __unittest = True

[Julian Berman]

New submission from Julian Berman:

Can `__unittest = True`, which is used to hide stack frames from tracebacks inside the testing framework, be documented as being public, or, if that's not acceptable, be replaced by something that is? `_exc_info_to_string` is a hairy function to need to rewrite when authoring a testing framework, but it's a rather common thing to want, and would be nice if it was easily done by integrating with what `TestCase` is already doing.

It's also (with or without formal blessing) being used in the wild in at least one place I know of here http://bazaar.launchpad.net/~testtools-committers/testtools/trunk/view/head:/testtools/testcase.py#L798  and since it's not terribly critical and will fail rather nicely even if the API changes suddenly I'd bet other places are using it too, though I haven't bothered to check.

See also http://twistedmatrix.com/trac/ticket/4127  which would be easier to implement if this were acceptable to use for external code.

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components: Library (Lib)
messages: 170126
nosy: Julian, michael.foord
priority: normal
severity: normal
status: open
title: A public facing API for __unittest = True
type: enhancement
versions: Python 3.3, Python 3.4

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<http://bugs.python.org/issue15891>
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