Resource warnings when run test_asyncio in leaks searching mode

[serhiy-storchaka]

BPO	25748
Nosy	@gvanrossum, @pitrou, @vstinner, @giampaolo, @vadmium, @serhiy-storchaka, @1st1
Superseder	bpo-25272: asyncio tests are getting noisy

^{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 = None
closed_at = <Date 2015-11-27.21:34:59.129>
created_at = <Date 2015-11-27.18:33:42.044>
labels = ['expert-asyncio', 'tests', 'performance']
title = 'Resource warnings when run test_asyncio in leaks searching mode'
updated_at = <Date 2015-11-27.21:34:59.128>
user = 'https://github.com/serhiy-storchaka'

bugs.python.org fields:

activity = <Date 2015-11-27.21:34:59.128>
actor = 'martin.panter'
assignee = 'none'
closed = True
closed_date = <Date 2015-11-27.21:34:59.129>
closer = 'martin.panter'
components = ['Tests', 'asyncio']
creation = <Date 2015-11-27.18:33:42.044>
creator = 'serhiy.storchaka'
dependencies = []
files = []
hgrepos = []
issue_num = 25748
keywords = []
message_count = 2.0
messages = ['255475', '255489']
nosy_count = 7.0
nosy_names = ['gvanrossum', 'pitrou', 'vstinner', 'giampaolo.rodola', 'martin.panter', 'serhiy.storchaka', 'yselivanov']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = None
status = 'closed'
superseder = '25272'
type = 'resource usage'
url = 'https://bugs.python.org/issue25748'
versions = ['Python 3.6']

[serhiy-storchaka]

$ ./python -m test.regrtest -uall -R 3:3 test_asyncio
[1/1] test_asyncio
...
.Executing <Task finished coro=<CoroutineTests.test_async_def_wrapped.<locals>.start() done, defined at /home/serhiy/py/cpython-debug/Lib/test/test_asyncio/test_pep492.py:146> result=None created at /home/serhiy/py/cpython-debug/Lib/asyncio/base_events.py:317> took 0.133 seconds
/home/serhiy/py/cpython-debug/Lib/threading.py:864: ResourceWarning: unclosed <socket.socket fd=7, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 37715)>
  self._target(*self._args, **self._kwargs)
returning true from eof_received() has no effect when using ssl
returning true from eof_received() has no effect when using ssl
/home/serhiy/py/cpython-debug/Lib/asyncio/base_events.py:379: ResourceWarning: unclosed event loop <_UnixSelectorEventLoop running=False closed=False debug=False>
  warnings.warn("unclosed event loop %r" % self, ResourceWarning)
...
1 test OK.

Cited lines are repeated 6 times (for the number of test runs).

[vadmium]

I guess this is not a special property of the leaks search. These messages are seen normally as well, see bpo-25693 and bpo-25272.