DeprecationWarning: DocumentLS.async is deprecated; use DocumentLS.async_

[jbwdevries]

Also, 'DeprecationWarning: Document.async is deprecated; use Document.async_'

venv/lib/python3.6/site-packages/pyfakefs/pytest_plugin.py:40: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
venv/lib/python3.6/site-packages/pyfakefs/fake_filesystem_unittest.py:591: in setUp
    self._find_modules()
venv/lib/python3.6/site-packages/pyfakefs/fake_filesystem_unittest.py:559: in _find_modules
    for f, i, d in self._def_values(fct):
venv/lib/python3.6/site-packages/pyfakefs/fake_filesystem_unittest.py:507: in _def_values
    predicate=inspect.isfunction):
/usr/lib/python3.6/inspect.py:342: in getmembers
    value = getattr(object, key)
/usr/lib/python3.6/xml/dom/xmlbuilder.py:346: in __get__
    self.warn(cls)

The item being inspected is xml.dom.xmlbuilder.DocumentLS

test_foo.py:

def test_my_func(fs):
    assert True

requirements.txt:

pyfakefs==4.1.0
pytest==6.0.1
pytest-cov==2.9.0

Makefile:

setup:
	python3 -m venv venv
	venv/bin/python -m pip install -r requirements.txt

test:
	venv/bin/python -m pytest

python 3.6.9

[mrbean-bremen]

Thanks for the report.

Hm, if some module issues a warning while inspecting one of its attributes, the only thing we can do here is just suppress all warnings, or at least deprecation warnings at this point, as we have no control over which modules are loaded.
This should be ok... I will probably check this over the weekend.

[mrbean-bremen]

@jbwdevries - shall be fixed in master, please check!

[jbwdevries]

Yes, it's fixed, thank you!