Method test_double_await

Lib/test/test_asyncio/test_pep492.py:190–208

(self)

        self.loop.run_until_complete(runner())

    def test_double_await(self):
        async def afunc():
            await asyncio.sleep(0.1)

        async def runner():
            coro = afunc()
            t = self.loop.create_task(coro)
            try:
                await asyncio.sleep(0)
                await coro
            finally:
                t.cancel()

        self.loop.set_debug(True)
        with self.assertRaises(
                RuntimeError,
                msg='coroutine is being awaited already'):

            self.loop.run_until_complete(runner())


if __name__ == '__main__':