def test_start_immediate_exception_eager_part(self):
class E(Exception): pass
async def run():
raise E
try:
_asyncio._start_immediate(run(), self.loop)
except E:
pass
else:
self.fail("Exception expected")
def test_start_immediate_finish_eagerly(self):
async def run():
return 42
val = _asyncio._start_immediate(run(), self.loop)
self.assertIsInstance(val, _asyncio.AwaitableValue)
self.assertEqual(val.value, 42)
def test_start_immediate_exception_deferred_part(self):
class E(Exception): pass
async def run():
await asyncio.sleep(0)
raise E
async def wait(t):
return await t
val = _asyncio._start_immediate(run(), self.loop)
self.assertNotIsInstance(val, _asyncio.AwaitableValue)
try:
self.loop.run_until_complete(wait(val))
except E:
pass
else:
self.fail("Exception expected")
def test_start_immediate_deferred(self):
started = False
finished = False
async def run():
nonlocal started, finished
started = True
await asyncio.sleep(0)
finished = True
return 42
async def wait(t):
return await t
val = _asyncio._start_immediate(run(), self.loop)
self.assertTrue(started)
self.assertFalse(finished)
self.assertNotIsInstance(val, _asyncio.AwaitableValue)
res = self.loop.run_until_complete(wait(val))
self.assertTrue(finished)
self.assertEqual(res, 42)
async def main():
val = _asyncio._start_immediate(run())
self.assertIs(val._loop, asyncio.get_running_loop())