import asyncio

from uvloop._testbase import UVTestCase


class TestCythonIntegration(UVTestCase):

    def test_cython_coro_is_coroutine(self):
        from uvloop.loop import _test_coroutine_1
        from asyncio.coroutines import _format_coroutine

        coro = _test_coroutine_1()

        self.assertEqual(_format_coroutine(coro), '_test_coroutine_1()')
        self.assertEqual(_test_coroutine_1.__qualname__, '_test_coroutine_1')
        self.assertEqual(_test_coroutine_1.__name__, '_test_coroutine_1')
        self.assertTrue(asyncio.iscoroutine(coro))
        fut = asyncio.ensure_future(coro, loop=self.loop)
        self.assertTrue(isinstance(fut, asyncio.Future))
        self.assertTrue(isinstance(fut, asyncio.Task))
        fut.cancel()

        with self.assertRaises(asyncio.CancelledError):
            self.loop.run_until_complete(fut)

        _format_coroutine(coro)  # This line checks against Cython segfault
        coro.close()