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import gevent
import gevent.testing as greentest
from gevent.lock import Semaphore
class Testiwait(greentest.TestCase):
def test_noiter(self):
# Test that gevent.iwait returns objects which can be iterated upon
# without additional calls to iter()
sem1 = Semaphore()
sem2 = Semaphore()
gevent.spawn(sem1.release)
ready = next(gevent.iwait((sem1, sem2)))
self.assertEqual(sem1, ready)
def test_iwait_partial(self):
# Test that the iwait context manager allows the iterator to be
# consumed partially without a memory leak.
sem = Semaphore()
let = gevent.spawn(sem.release)
with gevent.iwait((sem,), timeout=0.01) as iterator:
self.assertEqual(sem, next(iterator))
let.get()
def test_iwait_nogarbage(self):
sem1 = Semaphore()
sem2 = Semaphore()
let = gevent.spawn(sem1.release)
with gevent.iwait((sem1, sem2)) as iterator:
self.assertEqual(sem1, next(iterator))
self.assertEqual(sem2.linkcount(), 1)
self.assertEqual(sem2.linkcount(), 0)
let.get()
if __name__ == '__main__':
greentest.main()