test_events.py 文件源码

def test_signal_handling_while_selecting(self):
        # Test with a signal actually arriving during a select() call.
        caught = 0

        def my_handler():
            nonlocal caught
            caught += 1
            self.loop.stop()

        self.loop.add_signal_handler(signal.SIGALRM, my_handler)

        signal.setitimer(signal.ITIMER_REAL, 0.01, 0)  # Send SIGALRM once.
        self.loop.run_forever()
        self.assertEqual(caught, 1)