New submission from John Murphy:
The doctest.IGNORE_EXCEPTION_DETAIL optionflag does not seem to have the
desired behavior when the exception does not provide a message, due to the
regular expressions in doctest.DocTestRunner.__run expecting a colon in the
second group::
elif self.optionflags & IGNORE_EXCEPTION_DETAIL:
m1 = re.match(r'(?:[^:]*\.)?([^:]*:)', example.exc_msg)
m2 = re.match(r'(?:[^:]*\.)?([^:]*:)', exc_msg)
if m1 and m2 and check(m1.group(1), m2.group(1),
self.optionflags):
outcome = SUCCESS
Normally this wouldn't matter, as there's no need to ignore the exception
detail if there is no detail to normalize, but since
http://bugs.python.org/issue7490 it looks like the blessed method of
normalizing Python 2 and 3 exceptions in doctests is to use
IGNORE_EXCEPTION_DETAIL. This doesn't work for any exceptions which do
not have a message.
Example::
>>> def f(x):
... r'''
... >>> from http.client import HTTPException
... >>> raise HTTPException() #doctest: +IGNORE_EXCEPTION_DETAIL
... Traceback (most recent call last):
... foo.bar.HTTPException
... '''
>>> test = doctest.DocTestFinder().find(f)[0]
>>> doctest.DocTestRunner(verbose=True).run(test)
Failed example:
raise HTTPException() #doctest: +IGNORE_EXCEPTION_DETAIL
Expected:
Traceback (most recent call last):
foo.bar.HTTPException
Got:
Traceback (most recent call last):
...
http.client.HTTPException
I've attached a test and a very naive fix of the regular expression.
----------
components: Tests
files: exception_normalize.patch
keywords: patch
messages: 198792
nosy: jamur2
priority: normal
severity: normal
status: open
title: doctest.IGNORE_EXCEPTION_DETAIL doesn't match when no detail exists
type: behavior
versions: Python 2.7, Python 3.3
Added file: http://bugs.python.org/file31936/exception_normalize.patch
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue19138>
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