run_tests.py: Work around issues 20355 and 20361

[Arfrever]

BPO	20535
Nosy	@pitrou, @ezio-melotti, @voidspace, @serhiy-storchaka
Files	run_tests.py.patch

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/serhiy-storchaka'
closed_at = <Date 2014-02-24.13:35:58.025>
created_at = <Date 2014-02-06.21:55:17.227>
labels = ['type-bug', 'tests']
title = 'run_tests.py: Work around issues 20355 and 20361'
updated_at = <Date 2014-02-24.13:35:58.023>
user = 'https://bugs.python.org/Arfrever'

bugs.python.org fields:

activity = <Date 2014-02-24.13:35:58.023>
actor = 'serhiy.storchaka'
assignee = 'serhiy.storchaka'
closed = True
closed_date = <Date 2014-02-24.13:35:58.025>
closer = 'serhiy.storchaka'
components = ['Tests']
creation = <Date 2014-02-06.21:55:17.227>
creator = 'Arfrever'
dependencies = []
files = ['33948']
hgrepos = []
issue_num = 20535
keywords = ['patch']
message_count = 4.0
messages = ['210423', '210791', '212086', '212096']
nosy_count = 6.0
nosy_names = ['pitrou', 'ezio.melotti', 'Arfrever', 'michael.foord', 'python-dev', 'serhiy.storchaka']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue20535'
versions = ['Python 3.3', 'Python 3.4']

[Arfrever]

Tools/scripts/run_tests.py contains:

def main(regrtest_args):
    args = [sys.executable,
            '-W', 'default',      # Warnings set to 'default'
            '-bb',                # Warnings about bytes/bytearray
            '-E',                 # Ignore environment variables
            ]

As described in issues bpo-20355 and bpo-20361, -bb fails to enable BytesWarning errors.

I suggest to include a small workaround, which will be deleted in Python 3.5. I attach patch.

[pitrou]

This sounds fine.

[python-dev]

New changeset c89e495cdff8 by Serhiy Storchaka in branch '3.3':
Issue bpo-20535: PYTHONWARNING no longer affects the run_tests.py script.
http://hg.python.org/cpython/rev/c89e495cdff8

New changeset 656d0e273ccb by Serhiy Storchaka in branch 'default':
Issue bpo-20535: PYTHONWARNING no longer affects the run_tests.py script.
http://hg.python.org/cpython/rev/656d0e273ccb

[serhiy-storchaka]

LGTM too. Thank you for your patch Arfrever.