Method test_cancel_yield

Lib/test/test_asyncio/test_tasks.py:854–867

(self)

            (asyncio.CancelledError, ('my message',), 0))

    def test_cancel_yield(self):
        async def task():
            await asyncio.sleep(0)
            await asyncio.sleep(0)
            return 12

        t = self.new_task(self.loop, task())
        test_utils.run_briefly(self.loop)  # start coro
        t.cancel()
        self.assertRaises(
            asyncio.CancelledError, self.loop.run_until_complete, t)
        self.assertTrue(t.done())
        self.assertTrue(t.cancelled())
        self.assertFalse(t.cancel())

    def test_cancel_inner_future(self):
        f = self.new_future(self.loop)