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import eventlet
import tests
threading = eventlet.patcher.original('threading')
try:
import asyncio
except ImportError:
import trollius as asyncio
try:
get_ident = threading.get_ident # Python 3
except AttributeError:
get_ident = threading._get_ident # Python 2
class ThreadTests(tests.TestCase):
def test_ident(self):
result = {'ident': None}
def work():
result['ident'] = get_ident()
fut = self.loop.run_in_executor(None, work)
self.loop.run_until_complete(fut)
# ensure that work() was executed in a different thread
work_ident = result['ident']
self.assertIsNotNone(work_ident)
self.assertNotEqual(work_ident, get_ident())
def test_run_twice(self):
result = []
def work():
result.append("run")
fut = self.loop.run_in_executor(None, work)
self.loop.run_until_complete(fut)
self.assertEqual(result, ["run"])
# ensure that run_in_executor() can be called twice
fut = self.loop.run_in_executor(None, work)
self.loop.run_until_complete(fut)
self.assertEqual(result, ["run", "run"])
def test_policy(self):
result = {'loop': 'not set'} # sentinel, different than None
def work():
try:
result['loop'] = asyncio.get_event_loop()
except AssertionError as exc:
result['loop'] = exc
# get_event_loop() must return None in a different thread
fut = self.loop.run_in_executor(None, work)
self.loop.run_until_complete(fut)
self.assertIsInstance(result['loop'], AssertionError)
def test_run_in_thread(self):
class LoopThread(threading.Thread):
def __init__(self, event):
super(LoopThread, self).__init__()
self.loop = None
self.event = event
def run(self):
self.loop = asyncio.new_event_loop()
try:
self.loop.set_debug(True)
asyncio.set_event_loop(self.loop)
self.event.set()
self.loop.run_forever()
finally:
self.loop.close()
asyncio.set_event_loop(None)
result = []
# start an event loop in a thread
event = threading.Event()
thread = LoopThread(event)
thread.start()
event.wait()
loop = thread.loop
def func(loop):
result.append(threading.current_thread().ident)
loop.stop()
# FIXME: call_soon() must raise an exception if if the main thread
# has no event loop, bugs.python.org/issue22926
#self.loop.close()
#asyncio.set_event_loop(None)
# call_soon() must fail when called from the wrong thread
self.assertRaises(RuntimeError, loop.call_soon, func, loop)
# call func() in a different thread using the event loop
tid = thread.ident
loop.call_soon_threadsafe(func, loop)
# stop the event loop
thread.join()
self.assertEqual(result, [tid])
if __name__ == '__main__':
import unittest
unittest.main()
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