Closed
Description
demo reproducer:
import unittest
import asyncio
class DemoTestCase1(unittest.IsolatedAsyncioTestCase):
def setUp(self):
self.loop = asyncio.get_event_loop_policy().get_event_loop()
async def test_demo(self):
print("hello!")
class DemoTestCase2(unittest.IsolatedAsyncioTestCase):
def setUp(self):
self.loop = asyncio.get_event_loop_policy().get_event_loop()
async def test_demo(self):
print("hello!")
if __name__ == "__main__":
unittest.main()see also #93896
graingert@conscientious testing310 ~/projects python3.10 foo.py
hello!
.hello!
.
----------------------------------------------------------------------
Ran 2 tests in 0.002s
OK
graingert@conscientious testing310 ~/projects python3.11 foo.py
hello!
.E
======================================================================
ERROR: test_demo (__main__.DemoTestCase2.test_demo)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/lib/python3.11/unittest/async_case.py", line 82, in _callSetUp
self._asyncioTestContext.run(self.setUp)
File "/home/graingert/projects/foo.py", line 14, in setUp
self.loop = asyncio.get_event_loop_policy().get_event_loop()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.11/asyncio/events.py", line 677, in get_event_loop
raise RuntimeError('There is no current event loop in thread %r.'
RuntimeError: There is no current event loop in thread 'MainThread'.
----------------------------------------------------------------------
Ran 2 tests in 0.002s
FAILED (errors=1)
it looks like this is because asyncio.Runner calls asyncio.set_event_loop( in Runner.run
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