The module `asyncio.test_utils` has been removed from Python in the 3.7 branch, because it was intended to be a private module for internal testing of asyncio. For more information, see the upstream bug report at https://bugs.python.org/issue32273 and the upstream PR at https://github.com/python/cpython/pull/4785.
For this commit, I have migrated the small amount of functionality that was being used from the `asyncio.test_utils` directly into the `RunThreadsafeTests` Class. To see the original `asyncio.test_utils.TestCase` class, which I pulled some functionality from, please see: https://github.com/python/cpython/blob/3.6/Lib/asyncio/test_utils.py#L440
Note: In addition to being broken in 3.7, this test case also seems to be broken in Python 3.6.4 when using Docker. This PR fixes the test when run in docker.
To reproduce: `./script/test_docker -- tests/util/test_async.py`
failing output (prior to this commit):
```
... trimmed ...
py36 runtests: PYTHONHASHSEED='3262989550'
py36 runtests: commands[0] | py.test --timeout=9 --duration=10 --cov --cov-report= tests/util/test_async.py
Test session starts (platform: linux, Python 3.6.4, pytest 3.3.1, pytest-sugar 0.9.0)
rootdir: /usr/src/app, inifile: setup.cfg
plugins: timeout-1.2.1, sugar-0.9.0, cov-2.5.1, aiohttp-0.3.0
timeout: 9.0s method: signal
―――――――――――――――――― ERROR collecting tests/util/test_async.py ――――――――――――――――――――――――
ImportError while importing test module '/usr/src/app/tests/util/test_async.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
tests/util/test_async.py:3: in <module>
from asyncio import test_utils
/usr/local/lib/python3.6/asyncio/test_utils.py:36: in <module>
from test import support
E ImportError: cannot import name 'support'
```
* Add event loop to the core
* Add block_till_done to HA core object
* Fix some tests
* Linting core
* Fix statemachine tests
* Core test fixes
* fix block_till_done to wait for loop and queue to empty
* fix test_core for passing, and correct start/stop/block_till_done
* Fix remote tests
* Fix tests: block_till_done
* Fix linting
* Fix more tests
* Fix final linting
* Fix remote test
* remove unnecessary import
* reduce sleep to avoid slowing down the tests excessively
* fix remaining tests to wait for non-threadsafe operations
* Add async_ doc strings for event loop / coroutine info
* Fix command line test to block for the right timeout
* Fix py3.4.2 loop var access
* Fix SERVICE_CALL_LIMIT being in effect for other tests
* Fix lint errors
* Fix lint error with proper placement
* Fix slave start to not start a timer
* Add asyncio compatible listeners.
* Increase min Python version to 3.4.2
* Move async backports to util
* Add backported async tests
* Fix linting
* Simplify Python version check
* Fix lint
* Remove unneeded try/except and queue listener appproriately.
* Fix tuple vs. list unorderable error on version compare.
* Fix version tests
Matthias Urlichs
Marc Khouri
Adam Mills
Paulus Schoutsen
Johann Kellerman