Mailman 3 May 2021 - pytest-dev

Transfer of pyfakefs to pytest-dev?
by mrbean-bremen Sept. 30, 2022

Sept. 30, 2022

After the successful transfer of pytest-order (thank you for that smooth experience!), I have been thinking about the transfer of another library - pyfakefs - where I am a contributor. I have been discussing this with the package maintainer, John McGehee, who is also in favor for this, and decided to first ask here if that is feasible. pyfakefs (https://github.com/jmcgeheeiv/pyfakefs) is a library that mocks the file system. It has originally been developed by Mike Bland at Google, later transferred to GitHub (after the shutdown of Google Code in 2011), where John McGehee has forked it, added direct support for unittest and doctest, and has maintained it since then (with my help since a few years ago). Later a contributor added support for pytest via the fs fixture, with more support for pytest following eventually. Today the fs fixture is probably the main means to access pyfakefs, judging by the issues and the dependent repositories. So, while pyfakefs is not a pure pytest plugin, and it doesn't follow the naming convention pytest-xx, we thought that it would be a good idea to transfer it to pytest-dev, with the following goals: - ensure continued maintenance - increase compatibility with pytest and pytest-plugins - improve visibility of the package, especially for pytest developers - ideally, benefit from the larger community to get more code reviews and issue reports For reference see also https://github.com/jmcgeheeiv/pyfakefs/issues/590 What do you think? Thanks! -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

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pytest-cases presentation at EuroPython
by Sylvain MARIE May 20, 2021

May 20, 2021

Hi dear pytest dev I have proposed a talk for EuroPython about pytest-cases ("Powerful tests and reproducible benchmarks with `pytest-cases`") I saw that Florian Bruhin will also be proposing a talk about pytest ("Introduction to pytest", there seem to be 2 instances of it). https://ep2021.europython.eu/talk-voting/ Votes are now open so if you're interested in these talks, any upvote would be appreciated ! ;) Thanks in advance for your support, Best, Sylvain Internal

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Digging into pytest's history
by Florian Bruhin May 17, 2021

May 17, 2021

Hey, I'm not sure how many of you follow GitHub Discussions in the pytest-dev repository, so I'm crossposting this (lightly edited) from there: https://github.com/pytest-dev/pytest/discussions/8667 I've always wondered when pytest actually really was born - the first commit in the current pytest repository (5992a8ef21424d7571305a8d7e2a3431ee7e1e23) is from January 2007, and even that commit alone already tells a lot: This repository originally was from the py library[1] (later split off to pytest), and it originally was a SVN revision, migrated to Mercurial, and finally migrated to git. However, the commit says "create the new development trunk" and is already quite big: 435 files changed, 58640 insertions(+). So this week, I dug around in various other repositories and mailinglists to find out how it all started. As you might or might not know, pytest originally was born as part of PyPy[2], to make it easier to write tests for it. Here's what I found it with a bit of digging around: [1] https://pypi.org/project/py/ [2] https://www.pypy.org/ --- - Late 2002 / early 2003, PyPy was born: https://morepypy.blogspot.com/2018/09/the-first-15-years-of-pypy.html - Like that blog post mentioned, from very early on, there was a big focus on testing. There were various `testsupport` files on top of unittest.py, and as early as June 2003, Holger Krekel (@hpk42) refactored its test framework to clean things up (`pypy.tool.test`, but still on top of `unittest.py`, with nothing pytest-like yet, as far as I can tell): https://mail.python.org/pipermail/pypy-dev/2003-June/000787.html - In December 2003, there was another iteration at improving their testing situation, by Stefan Schwarzer, called `pypy.tool.newtest`: https://foss.heptapod.net/pypy/pypy/-/commit/02752373e1b29d89c6bb0a97e5f940… - However, it didn't seem to be around for long, as around June/July 2004, efforts started on a thing called `utest`, offering plain assertions. This seems like the start of something pytest-like, but unfortunately, I didn't actually find the test runner's code anywhere. The best I could find is one file, but that doesn't seem like a complete test runner at all. What I can see is that there were various efforts by Laura Creighton and Samuele Pedroni (@pedronis) at automatically converting existing tests to the new `utest` framework: https://foss.heptapod.net/pypy/pypy/-/commit/0735f9ed287ec20950a7dd0a16fc10… https://foss.heptapod.net/pypy/pypy/-/commits/branch/default?utf8=%E2%9C%93… - Around the same time, for Europython 2004, @hpk42 started a project originally called "std", intended to be a "complementary standard library": http://web.archive.org/web/20041020215353/http://codespeak.net/svn/user/hpk… In that talk, he was already laying out the principles behind what later became pytest: > - current "batteries included" are very useful, but > * some of them are written in a pretty much java-like style, > especially the unittest-framework > * [...] > * the best API is one that doesn't exist > > [...] > > - a testing package should require as few boilerplate code as > possible and offer much flexibility > - it should provide premium quality tracebacks and debugging aid > > [...] > > - first of all ... forget about limited "assertXYZ APIs" > and use the real thing, e.g.: > > assert x == y > > - this works with plain python but you get unhelpful "assertion > failed" errors with no information > > - std.utest (magic!) actually reinterprets the assertion expression > and offers detailed information about underlying values - In September 2004, the `py-dev` mailinglist gets born, which is now pytest-dev, but thankfully with all the original archives still intact: https://mail.python.org/pipermail/pytest-dev/ - Around September/October 2004, the `std` project was renamed to `py`: https://mail.python.org/pipermail/pypy-dev/2004-September/001565.html with that move, `std.utest` became `py.test`. This is also the first time I actually found the entire source code: https://foss.heptapod.net/pypy/pypy/-/commit/42cf50c412026028e20acd23d518bd… I was surprised how much of the API still seems around today: * `py.path.local`, which we're trying to get rid of (in favour of pathlib) some 16-17 years later * The idea of the collection tree, including `Collector`, `FSCollector`, `Directory`, `PyCollector`, `Module`, `Class` * Arguments like `-x` / `--exitfirst`, `-l` / `--showlocals`, `--fulltrace`, `--pdb`, `-S` / `--nocapture` (`-s` / `--capture=off` today), `--collectonly` (`--collect-only` today) - In the same month, the `py` library gets split off from `PyPy`: https://foss.heptapod.net/pypy/pypy/-/commit/6bdafe9203ad92eb259270b2671891… - It seemed to get rather quiet for a while, and I can't really find much between October 2004 (removing `py` from PyPy) and January 2007 (first commit in the now-pytest repository). However, there were various discussions about features/ideas on the mailinglist, and a couple of releases every couple of months: https://pypi.org/project/py/0.8.0-alpha2/#history * March 2006: py 0.8.0-alpha2 * May 2007: py 0.9.0 * March 2008: py 0.9.1 (first release to be found in the pytest changelog: https://github.com/pytest-dev/pytest/blob/main/doc/en/changelog.rst#091) * August 2008: py 0.9.2 - In August 2009, py 1.0.0 was released, introducing a lot of fundamental features: https://holgerkrekel.net/2009/08/04/pylib-1-0-0-released-the-testing-with-p… * funcargs/fixtures * A plugin architecture which still looks very much the same today! http://web.archive.org/web/20090629032718/https://codespeak.net/py/dist/tes… * Various default plugins, including monkeypatch http://web.archive.org/web/20091005181132/https://codespeak.net/py/dist/tes… http://web.archive.org/web/20091012022829/http://codespeak.net/py/dist/test… - Even back there, the FAQ said: http://web.archive.org/web/20091005222413/http://codespeak.net/py/dist/faq.… > Clearly, [a second standard library] was ambitious and the naming > has maybe haunted the project rather than helping it. There may be a > project name change and possibly a split up into different projects > sometime. and that finally happened in November 2010, when pytest 2.0.0 was released as a package separate from `py` (but still called `py.test`): https://mail.python.org/pipermail/pytest-dev/2010-November/001687.html - In August 2016, pytest 3.0.0 was released, which adds `pytest` (rather than `py.test`) as the recommended command-line entry point: https://docs.pytest.org/en/latest/changelog.html#id1313 --- So, do I have an answer to my question "when was pytest started" now? Well, yes and no. It depends what point you really regard as the start of it all - I'd pick Europython 2004, i.e. around June/July 2004 - which means pytest is turning 17 soon, with many of its core concepts still being around! If anyone finds something I've missed (e.g. about what happened between mid-2004 and mid-2007), I'd be more than happy to hear about it! Florian -- me(a)the-compiler.org | https://www.qutebrowser.org https://bruhin.software/ | https://github.com/sponsors/The-Compiler/ GPG: 916E B0C8 FD55 A072 | https://the-compiler.org/pubkey.asc I love long mails! | https://email.is-not-s.ms/

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Pytest Dev Team Joining Request: pytest-mimesis
by Likid May 6, 2021

May 6, 2021

Hi! My name is Isaak. I’m the author of Mimesis <https://github.com/lk-geimfari/mimesis> and https://github.com/pytest-dev/pytest-mimesis. I would like to join pytest-dev organization on Github, so I can work on pytest-mimesis directly. Also, I would like to contribute to other pytest plugins. As I know, anyone who contributed to pytest can join the dev team <https://docs.pytest.org/en/6.2.x/contributing.html#joining-the-development-…>, so I hope I can do it too. Thank you all!

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pytest 6.2.4 has been released!
by Anthony Sottile May 4, 2021

May 4, 2021

pytest-6.2.4 ======================================= pytest 6.2.4 has just been released to PyPI. This is a bug-fix release, being a drop-in replacement. To upgrade:: pip install --upgrade pytest The full changelog is available at https://docs.pytest.org/en/stable/changelog.html. Thanks to all of the contributors to this release: * Anthony Sottile * Bruno Oliveira * Christian Maurer * Florian Bruhin * Ran Benita Happy testing, The pytest Development Team

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