locks_test.py 文件源码

def test_context_manager_contended(self):
        sem = locks.Semaphore()
        history = []

        @gen.coroutine
        def f(index):
            with (yield sem.acquire()):
                history.append('acquired %d' % index)
                yield gen.sleep(0.01)
                history.append('release %d' % index)

        yield [f(i) for i in range(2)]

        expected_history = []
        for i in range(2):
            expected_history.extend(['acquired %d' % i, 'release %d' % i])

        self.assertEqual(expected_history, history)