log

$ PATH=$PATH:/e/Graphviz2.38/bin pytest ceed/tests/test_play.py
============================================================================================================= test session starts ============================================================================================================= platform win32 -- Python 3.7.3, pytest-4.6.3, py-1.8.0, pluggy-0.12.0
rootdir: G:\Python\libs\ceed, inifile: pytest.ini
plugins: cov-2.7.1, trio-0.5.2
collected 2 items

ceed\tests\test_play.py F.                                                                                                                                                                                                               [100%]

================================================================================================================== FAILURES =================================================================================================================== ________________________________________________________________________________________________________________ test_app_leak ________________________________________________________________________________________________________________

value = <trio._core._run.Nursery object at 0x00000289B03A10F0>

    async def yield_(value=None):
>       return await _yield_(value)

e:\python\python37\lib\site-packages\async_generator\_impl.py:106:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ e:\python\python37\lib\site-packages\async_generator\_impl.py:99: in _yield_
    return (yield _wrap(value))
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

nursery = <trio._core._run.Nursery object at 0x00000289B03A10F0>

    @pytest.fixture()
    async def my_app(nursery):
        app = SomethingInteresting()
        nursery.start_soon(app.run)
        yield app

        app = weakref.ref(app)
        gc.collect()
        print('app is', app())
        if app() is not None:
                import objgraph
                objgraph.show_chain(
                        objgraph.find_backref_chain(app(), objgraph.is_proper_module), filename=r'E:\sample-graph.png')
>               assert False
E     assert False

ceed\tests\test_play.py:31: AssertionError
------------------------------------------------------------------------------------------------------------ Captured stdout call ------------------------------------------------------------------------------------------------------------- I did the interesting thing
app checked
app is <test_play.SomethingInteresting object at 0x00000289B03A17B8>
Graph written to E:\msys64\tmp\objgraph-f9bn0r_0.dot (11 nodes)
Image generated as E:\sample-graph.png

trio.py

import pytest
import gc
import weakref
import trio


class SomethingInteresting(object):

	async def run(self):
		await trio.sleep(1)
		print('I did the interesting thing')

	async def check_app(self):
		await trio.sleep(3)
		print('app checked')


@pytest.fixture()
async def my_app(nursery):
	app = SomethingInteresting()
	nursery.start_soon(app.run)
	yield app

	app = weakref.ref(app)
	gc.collect()
	print('app is', app())
	if app() is not None:
		import objgraph
		objgraph.show_chain(
			objgraph.find_backref_chain(app(), objgraph.is_proper_module), filename=r'E:\sample-graph.png')
		assert False


async def test_app_leak(my_app):
	await my_app.check_app()


async def test_non_fixture(nursery):
	app = SomethingInteresting()
	nursery.start_soon(app.run)
	await app.check_app()

	app = weakref.ref(app)
	gc.collect()
	print('app is', app())
	if app() is not None:
		assert False