Method test_cancel

Lib/test/test_asyncio/test_tasks.py:713–732

(self)

            loop.close()

    def test_cancel(self):

        def gen():
            when = yield
            self.assertAlmostEqual(10.0, when)
            yield 0

        loop = self.new_test_loop(gen)

        async def task():
            await asyncio.sleep(10.0)
            return 12

        t = self.new_task(loop, task())
        loop.call_soon(t.cancel)
        with self.assertRaises(asyncio.CancelledError):
            loop.run_until_complete(t)
        self.assertTrue(t.done())
        self.assertTrue(t.cancelled())
        self.assertFalse(t.cancel())

    def test_cancel_with_message_then_future_result(self):
        # Test Future.result() after calling cancel() with a message.