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BERHASIL DIUBAH!

EDITING: test_futures2.py

# IsolatedAsyncioTestCase based tests
import asyncio
import traceback
import unittest
from asyncio import tasks

def tearDownModule():
    asyncio.set_event_loop_policy(None)

class FutureTests:

async def test_future_traceback(self):

async def raise_exc():
            raise TypeError(42)

future = self.cls(raise_exc())

for _ in range(5):
            try:
                await future
            except TypeError as e:
                tb = ''.join(traceback.format_tb(e.__traceback__))
                self.assertEqual(tb.count("await future"), 1)
            else:
                self.fail('TypeError was not raised')

@unittest.skipUnless(hasattr(tasks, '_CTask'),
                       'requires the C _asyncio module')
class CFutureTests(FutureTests, unittest.IsolatedAsyncioTestCase):
    cls = tasks._CTask

class PyFutureTests(FutureTests, unittest.IsolatedAsyncioTestCase):
    cls = tasks._PyTask

class FutureReprTests(unittest.IsolatedAsyncioTestCase):

async def test_recursive_repr_for_pending_tasks(self):
        # The call crashes if the guard for recursive call
        # in base_futures:_future_repr_info is absent
        # See Also: https://bugs.python.org/issue42183

async def func():
            return asyncio.all_tasks()

# The repr() call should not raise RecursiveError at first.
        # The check for returned string is not very reliable but
        # exact comparison for the whole string is even weaker.
        self.assertIn('...', repr(await asyncio.wait_for(func(), timeout=10)))

if __name__ == '__main__':
    unittest.main()