test_concurrent_futures.py 文件源码

def test_exception_with_timeout(self):
        self.assertRaises(futures.TimeoutError,
                          PENDING_FUTURE.exception, timeout=0)
        self.assertRaises(futures.TimeoutError,
                          RUNNING_FUTURE.exception, timeout=0)
        self.assertRaises(futures.CancelledError,
                          CANCELLED_FUTURE.exception, timeout=0)
        self.assertRaises(futures.CancelledError,
                          CANCELLED_AND_NOTIFIED_FUTURE.exception, timeout=0)
        self.assertTrue(isinstance(EXCEPTION_FUTURE.exception(timeout=0),
                                   OSError))
        self.assertEqual(SUCCESSFUL_FUTURE.exception(timeout=0), None)