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bpo-45097: Add more tests for shutdown_asyncgens() #28154

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Merged
serhiy-storchaka merged 1 commit into from
Sep 4, 2021
Merged

bpo-45097: Add more tests for shutdown_asyncgens() #28154

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79 changes: 79 additions & 0 deletions Lib/test/test_asyncgen.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1289,6 +1289,85 @@ async def wait():

self.assertEqual(finalized, 2)

def test_async_gen_asyncio_shutdown_02(self):
messages = []

def exception_handler(loop, context):
messages.append(context)

async def async_iterate():
yield 1
yield 2

it = async_iterate()
async def main():
loop = asyncio.get_running_loop()
loop.set_exception_handler(exception_handler)

async for i in it:
break

asyncio.run(main())

self.assertEqual(messages, [])

def test_async_gen_asyncio_shutdown_exception_01(self):
messages = []

def exception_handler(loop, context):
messages.append(context)

async def async_iterate():
try:
yield 1
yield 2
finally:
1/0

it = async_iterate()
async def main():
loop = asyncio.get_running_loop()
loop.set_exception_handler(exception_handler)

async for i in it:
break

asyncio.run(main())

message, = messages
self.assertEqual(message['asyncgen'], it)
self.assertIsInstance(message['exception'], ZeroDivisionError)
self.assertIn('an error occurred during closing of asynchronous generator',
message['message'])

def test_async_gen_asyncio_shutdown_exception_02(self):
messages = []

def exception_handler(loop, context):
messages.append(context)

async def async_iterate():
try:
yield 1
yield 2
finally:
1/0

async def main():
loop = asyncio.get_running_loop()
loop.set_exception_handler(exception_handler)

async for i in async_iterate():
break
gc_collect()

asyncio.run(main())

message, = messages
self.assertIsInstance(message['exception'], ZeroDivisionError)
self.assertIn('unhandled exception during asyncio.run() shutdown',
message['message'])

def test_async_gen_expression_01(self):
async def arange(n):
for i in range(n):
Expand Down