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import unittest
import eventlet
from eventlet import semaphore
from tests import LimitedTestCase
class TestSemaphore(LimitedTestCase):
def test_bounded(self):
sem = semaphore.CappedSemaphore(2, limit=3)
self.assertEqual(sem.acquire(), True)
self.assertEqual(sem.acquire(), True)
gt1 = eventlet.spawn(sem.release)
self.assertEqual(sem.acquire(), True)
self.assertEqual(-3, sem.balance)
sem.release()
sem.release()
sem.release()
gt2 = eventlet.spawn(sem.acquire)
sem.release()
self.assertEqual(3, sem.balance)
gt1.wait()
gt2.wait()
def test_bounded_with_zero_limit(self):
sem = semaphore.CappedSemaphore(0, 0)
gt = eventlet.spawn(sem.acquire)
sem.release()
gt.wait()
if __name__=='__main__':
unittest.main()
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