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95 lines
2.8 KiB
Python
95 lines
2.8 KiB
Python
# IsolatedAsyncioTestCase based tests
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import asyncio
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import contextvars
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import traceback
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import unittest
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from asyncio import tasks
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def tearDownModule():
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asyncio.set_event_loop_policy(None)
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class FutureTests:
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async def test_future_traceback(self):
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async def raise_exc():
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raise TypeError(42)
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future = self.cls(raise_exc())
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for _ in range(5):
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try:
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await future
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except TypeError as e:
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tb = ''.join(traceback.format_tb(e.__traceback__))
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self.assertEqual(tb.count("await future"), 1)
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else:
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self.fail('TypeError was not raised')
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async def test_task_exc_handler_correct_context(self):
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# see https://github.com/python/cpython/issues/96704
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name = contextvars.ContextVar('name', default='foo')
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exc_handler_called = False
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def exc_handler(*args):
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self.assertEqual(name.get(), 'bar')
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nonlocal exc_handler_called
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exc_handler_called = True
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async def task():
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name.set('bar')
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1/0
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loop = asyncio.get_running_loop()
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loop.set_exception_handler(exc_handler)
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self.cls(task())
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await asyncio.sleep(0)
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self.assertTrue(exc_handler_called)
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async def test_handle_exc_handler_correct_context(self):
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# see https://github.com/python/cpython/issues/96704
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name = contextvars.ContextVar('name', default='foo')
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exc_handler_called = False
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def exc_handler(*args):
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self.assertEqual(name.get(), 'bar')
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nonlocal exc_handler_called
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exc_handler_called = True
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def callback():
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name.set('bar')
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1/0
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loop = asyncio.get_running_loop()
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loop.set_exception_handler(exc_handler)
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loop.call_soon(callback)
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await asyncio.sleep(0)
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self.assertTrue(exc_handler_called)
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@unittest.skipUnless(hasattr(tasks, '_CTask'),
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'requires the C _asyncio module')
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class CFutureTests(FutureTests, unittest.IsolatedAsyncioTestCase):
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cls = tasks._CTask
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class PyFutureTests(FutureTests, unittest.IsolatedAsyncioTestCase):
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cls = tasks._PyTask
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class FutureReprTests(unittest.IsolatedAsyncioTestCase):
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async def test_recursive_repr_for_pending_tasks(self):
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# The call crashes if the guard for recursive call
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# in base_futures:_future_repr_info is absent
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# See Also: https://bugs.python.org/issue42183
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async def func():
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return asyncio.all_tasks()
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# The repr() call should not raise RecursionError at first.
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waiter = await asyncio.wait_for(asyncio.Task(func()),timeout=10)
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self.assertIn('...', repr(waiter))
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if __name__ == '__main__':
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unittest.main()
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