DeprecationWarning with pytest 7

[jaraco]

I see this error when running with errors:

pytest-perf main $ tox -- --collectonly -We
python develop-inst-noop: /Users/jaraco/code/main/pytest-perf
python installed: attrs==21.4.0,autocommand==2.2.1,black==22.1.0,click==8.0.3,coverage==6.3.1,docutils==0.18.1,filelock==3.4.2,flake8==4.0.1,importlib-metadata==4.10.1,iniconfig==1.1.1,jaraco.context==4.1.1,jaraco.functools==3.5.0,mccabe==0.6.1,more-itertools==8.12.0,mypy==0.931,mypy-extensions==0.4.3,packaging==21.3,path==16.3.0,pathspec==0.9.0,pep517==0.12.0,pip-run==8.8.0,platformdirs==2.4.1,pluggy==1.0.0,py==1.11.0,pycodestyle==2.8.0,pyflakes==2.4.0,pyparsing==3.0.7,pytest==7.0.0,pytest-black==0.3.12,pytest-checkdocs==2.7.1,pytest-cov==3.0.0,pytest-enabler==1.2.1,pytest-flake8==1.0.7,pytest-mypy==0.9.0,-e git+gh://jaraco/pytest-perf@9a7dec311c22746fc052f5c0085c5692e367722d#egg=pytest_perf,pytz==2021.3,tempora==5.0.1,toml==0.10.2,tomli==2.0.0,typing_extensions==4.0.1,zipp==3.7.0
python run-test-pre: PYTHONHASHSEED='3349794569'
python run-test: commands[0] | pytest --collectonly -We
/Users/jaraco/code/main/pytest-perf/.tox/python/lib/python3.10/site-packages/_pytest/nodes.py:664: PytestWarning: Flake8Item is an Item subclass and should not be a collector, however its bases File are collectors.
Please split the Collectors and the Item into separate node types.
Pytest Doc example: https://docs.pytest.org/en/latest/example/nonpython.html
example pull request on a plugin: https://github.com/asmeurer/pytest-flakes/pull/40/
  warnings.warn(
/Users/jaraco/code/main/pytest-perf/.tox/python/lib/python3.10/site-packages/_pytest/nodes.py:664: PytestWarning: BlackItem is an Item subclass and should not be a collector, however its bases File are collectors.
Please split the Collectors and the Item into separate node types.
Pytest Doc example: https://docs.pytest.org/en/latest/example/nonpython.html
example pull request on a plugin: https://github.com/asmeurer/pytest-flakes/pull/40/
  warnings.warn(
====================================================================== test session starts =======================================================================
platform darwin -- Python 3.10.1, pytest-7.0.0, pluggy-1.0.0
cachedir: .tox/python/.pytest_cache
rootdir: /Users/jaraco/code/main/pytest-perf, configfile: pytest.ini
plugins: flake8-1.0.7, enabler-1.2.1, checkdocs-2.7.1, black-0.3.12, mypy-0.9.0, cov-3.0.0, perf-0.11.1.dev3+g9a7dec3
collected 0 items / 1 error                                                                                                                                      

============================================================================= ERRORS =============================================================================
_________________________________________________________________ ERROR collecting test session __________________________________________________________________
.tox/python/lib/python3.10/site-packages/pluggy/_hooks.py:265: in __call__
    return self._hookexec(self.name, self.get_hookimpls(), kwargs, firstresult)
.tox/python/lib/python3.10/site-packages/pluggy/_manager.py:80: in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
pytest_perf/plugin.py:21: in pytest_collect_file
    return File.from_parent(parent, fspath=path)
.tox/python/lib/python3.10/site-packages/_pytest/nodes.py:633: in from_parent
    return super().from_parent(parent=parent, fspath=fspath, path=path, **kw)
.tox/python/lib/python3.10/site-packages/_pytest/nodes.py:264: in from_parent
    return cls._create(parent=parent, **kw)
.tox/python/lib/python3.10/site-packages/_pytest/nodes.py:140: in _create
    return super().__call__(*k, **kw)
.tox/python/lib/python3.10/site-packages/_pytest/nodes.py:588: in __init__
    path = _imply_path(type(self), path, fspath=fspath)
.tox/python/lib/python3.10/site-packages/_pytest/nodes.py:110: in _imply_path
    warnings.warn(
E   pytest.PytestRemovedIn8Warning: The (fspath: py.path.local) argument to File is deprecated. Please use the (path: pathlib.Path) argument instead.
E   See https://docs.pytest.org/en/latest/deprecations.html#fspath-argument-for-node-constructors-replaced-with-pathlib-path

---------- coverage: platform darwin, python 3.10.1-final-0 ----------
Name                    Stmts   Miss  Cover   Missing
-----------------------------------------------------
pytest_perf/plugin.py      76     74     3%   1-17, 24-120
-----------------------------------------------------
TOTAL                      76     74     3%

==================================================================== short test summary info =====================================================================
ERROR  - pytest.PytestRemovedIn8Warning: The (fspath: py.path.local) argument to File is deprecated. Please use the (path: pathlib.Path) argument instead.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
============================================================== no tests collected, 1 error in 0.13s ==============================================================
ERROR: InvocationError for command /Users/jaraco/code/main/pytest-perf/.tox/python/bin/pytest --collectonly -We (exited with code 2)
____________________________________________________________________________ summary _____________________________________________________________________________
ERROR:   python: commands failed

Referencing this guide.

[jaraco]

In 8cf29ad, I figured out a fix for the issue. Unfortunately, the fix relies on pytest 7, making the plugin incompatible with pytest 6.