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import asyncio
import subprocess
import sys
from uvloop import _testbase as tb
class TestDealloc(tb.UVTestCase):
def test_dealloc_1(self):
# Somewhere between Cython 0.25.2 and 0.26.0 uvloop programs
# started to trigger the following output:
#
# $ python prog.py
# Error in sys.excepthook:
#
# Original exception was:
#
# Upon some debugging, it appeared that Handle.__dealloc__ was
# called at a time where some CPython objects become non-functional,
# and any exception in __dealloc__ caused CPython to output the
# above.
#
# This regression test starts an event loop in debug mode,
# lets it run for a brief period of time, and exits the program.
# This will trigger Handle.__dealloc__, CallbackHandle.__dealloc__,
# and Loop.__dealloc__ methods. The test will fail if they produce
# any unwanted output.
async def test():
prog = '''\
import uvloop
async def foo():
return 42
def main():
loop = uvloop.new_event_loop()
loop.set_debug(True)
loop.run_until_complete(foo())
# Do not close the loop on purpose: let __dealloc__ methods run.
if __name__ == '__main__':
main()
'''
cmd = sys.executable
proc = await asyncio.create_subprocess_exec(
cmd, b'-W', b'ignore', b'-c', prog,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
await proc.wait()
out = await proc.stdout.read()
err = await proc.stderr.read()
return out, err
out, err = self.loop.run_until_complete(test())
self.assertEqual(out, b'', 'stdout is not empty')
self.assertEqual(err, b'', 'stderr is not empty')
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