Method test_cancelling

Lib/test/test_asyncio/test_tasks.py:518–540

(self)

    def test_cancelling(self):
        loop = asyncio.new_event_loop()

        async def task():
            await asyncio.sleep(10)

        try:
            t = self.new_task(loop, task())
            self.assertFalse(t.cancelling())
            self.assertNotIn(" cancelling ", repr(t))
            self.assertTrue(t.cancel())
            self.assertTrue(t.cancelling())
            self.assertIn(" cancelling ", repr(t))

            # Since we commented out two lines from Task.cancel(),
            # this t.cancel() call now returns True.
            # self.assertFalse(t.cancel())
            self.assertTrue(t.cancel())

            with self.assertRaises(asyncio.CancelledError):
                loop.run_until_complete(t)
        finally:
            loop.close()

    def test_uncancel_basic(self):
        loop = asyncio.new_event_loop()