def event_loop():
loop = asyncio.new_event_loop()
# use ErrorContainer to catch otherwise hidden exceptions occurring in async scheduled tasks
error_container = asyncio_tools.ErrorContainer()
loop.set_exception_handler(error_container.exception_handler)
yield loop
# will fail if exceptions have been silently raised
loop.run_until_complete(error_container.check())
loop.close()
async def test_with_error_container():
error_container = asyncio_tools.ErrorContainer()
error_container.print_received_exceptions = False
asyncio.get_event_loop().set_exception_handler(
error_container.exception_handler)
# will propagate exception
asyncio.get_event_loop().call_soon(_exception_raiser)
with pytest.raises(AssertionError):
# ensure exception is caught
await asyncio.create_task(error_container.check())