Yes, `call` is supported, alongside other names from `unittest.mock`. In
some cases, like with `spy`, they not only mirror but also extend the
existing functionality. Ref:
https://pytest-mock.readthedocs.io/en/latest/usage.html
On 2025/07/10 14:47:30 Tzu-ping Chung wrote:
> Does pytest-mock have an equivalent for call()? I agree for mocking in
general we should consider replacing plain decorators and context managers
with the mocker fixture. This probably deserves its own discussion thread.
>
> --
> Sent from my iPhone
>
> > On 10 Jul 2025, at 14:37, Dev-iL <gi...@gmail.com> wrote:
> >
> > One tiny comment regarding TP's suggestion - IMHO it's better to avoid
`unittest.mock` in favor of the equivalent `mocker` fixture provided by
`pytest-mock`.
> >
> > On 2025/07/10 06:30:22 Tzu-ping Chung wrote:
> > > Personally I dislike things like assert_called_once_with etc. since
they are easy to miss when you scan a test to see what they are trying to
check. An 'assert' keyword stands out (it’s always the first word in the
line), especially with syntax highlighting.
> > >
> > > I do agree the proposed Pytest style is arguably less readable. I
offer another syntax.
> > >
> > >
> > > from unittest.mock import call
> > >
> > > assert mock_http_run.mock_calls == [
> > > call(
> > > endpoint=f"api/v2/accounts/{expected_account_id}/",
> > > data=None,
> > > extra_options=None,
> > > )
> > > ]
> > > assert mock_paginate.mock_calls == []
> > >
> > >
> > > To me, this is on par with assert_called_once_with et al. in terms of
readability, and arguably better for test authors since you don’t need to
remember the various function names anymore, but only 'mock_calls' and the
'call' helper class.
> > >
> > > TP
> > >
> > >
> > > > On Jul 9, 2025, at 23:28, Ferruzzi, Dennis <fe...@amazon.com.INVALID>
wrote:
> > > >
> > > > I'm a bit late to the party, and really only reiterating what has
already been said, but of the two examples (original and your rewrite, I
prefer the original. I think as a general rule, we tend to use the
assert_called_once, etc with mocks butt he asserts with non-mocked
variables.
> > > >
> > > > I am all for more documentation, but I'd have a slight preference
towards keeping the existing structure.
> > > >
> > > >
> > > > - ferruzzi
> > > >
> > > >
> > > > ________________________________
> > > > From: Kyungjun Lee <ky...@gmail.com>
> > > > Sent: Tuesday, July 8, 2025 2:13 AM
> > > > To: dev@airflow.apache.org
> > > > Subject: RE: [EXT] [DISCUSS] Consistent test assertion style:
pytest-native vs unittest-style
> > > >
> > > > CAUTION: This email originated from outside of the organization. Do
not click links or open attachments unless you can confirm the sender and
know the content is safe.
> > > >
> > > >
> > > >
> > > > AVERTISSEMENT: Ce courrier électronique provient d’un expéditeur
externe. Ne cliquez sur aucun lien et n’ouvrez aucune pièce jointe si vous
ne pouvez pas confirmer l’identité de l’expéditeur et si vous n’êtes pas
certain que le contenu ne présente aucun risque.
> > > >
> > > >
> > > >
> > > > Thank you Ash and Amogh Desai for your insights and explanations.
> > > > The information you shared has been incredibly helpful and is
contributing
> > > > a lot to my growth.
> > > >
> > > > 2025년 7월 8일 (화) 오후 2:54, Amogh Desai <am...@gmail.com>님이 작성:
> > > >
> > > >> Agreed, I personally also find the current way to be easier to
read and in
> > > >> most
> > > >> cases we want to assert if "something" was called, irrespective of
the
> > > >> order it was
> > > >> called in. So the dedicated function based way works well for me.
> > > >>
> > > >> If I want to test a order, I'd rather call parts of code that I
want to
> > > >> test explicitly and assert
> > > >> on them.
> > > >>
> > > >>> This happens because the mock object is not properly recognized
as a mock
> > > >> instance at type-checking time, which might confuse some
contributors,
> > > >> especially new ones relying on type hints or static analysis tools.
> > > >>
> > > >> Regarding this, I'd say you can either cast mocks to their types
as one
> > > >> way:
> > > >> `mock_http_run: MagicMock = mock_http_run` -- give or take, or use
> > > >> `autospec` to make the mock reflect the signature of the object?
Check out:
> > > >> https://docs.python.org/3/library/unittest.mock.html#autospeccing
> > > >>
> > > >> Thanks & Regards,
> > > >> Amogh Desai
> > > >>
> > > >>
> > > >> On Mon, Jul 7, 2025 at 6:13 PM Ash Berlin-Taylor <as...@apache.org>
wrote:
> > > >>
> > > >>> def test_get_account(self, mock_paginate: Mock, mock_http_run:
Mocj,
> > > >>> conn_id, account_id):
> > > >>>
> > > >>>
> > > >>> Might fix that? IDEs in general do not cope well with purest
tests, and
> > > >>> are missing context on what most of the variables are, be it
> > > >> parameterised
> > > >>> values or fixture values, so this isn’t a problem that is unique
to
> > > >> mocks.
> > > >>>
> > > >>>> On 7 Jul 2025, at 12:47, Kyungjun Lee <ky...@gmail.com>
> > > >> wrote:
> > > >>>>
> > > >>>> I'd like to follow up on our previous discussion about
pytest-native vs
> > > >>>> unittest-style assertions.
> > > >>>>
> > > >>>> While working on the following test case:
> > > >>>>
> > > >>>> ```python
> > > >>>>
> > > >>>> @pytest.mark.parametrize(
> > > >>>> argnames="conn_id, account_id",
> > > >>>> argvalues=[(ACCOUNT_ID_CONN, None), (NO_ACCOUNT_ID_CONN,
> > > >> ACCOUNT_ID)],
> > > >>>> ids=["default_account", "explicit_account"],
> > > >>>> )
> > > >>>> @patch.object(DbtCloudHook, "run")
> > > >>>> @patch.object(DbtCloudHook, "_paginate")
> > > >>>> def test_get_account(self, mock_paginate, mock_http_run, conn_id,
> > > >>>> account_id):
> > > >>>> hook = DbtCloudHook(conn_id)
> > > >>>> hook.get_account(account_id=account_id)
> > > >>>>
> > > >>>> assert hook.method == "GET"
> > > >>>>
> > > >>>> _account_id = account_id or DEFAULT_ACCOUNT_ID
> > > >>>> hook.run.assert_called_once_with(
> > > >>>> endpoint=f"api/v2/accounts/{_account_id}/", data=None,
> > > >>>> extra_options=None
> > > >>>> )
> > > >>>> hook._paginate.assert_not_called()
> > > >>>>
> > > >>>> ```
> > > >>>>
> > > >>>> My IDE shows a warning:
> > > >>>> Cannot find reference 'assert_called_once_with' in 'function'.
> > > >>>>
> > > >>>> This happens because the mock object is not properly recognized
as a
> > > >> mock
> > > >>>> instance at type-checking time, which might confuse some
contributors,
> > > >>>> especially new ones relying on type hints or static analysis
tools.
> > > >>>>
> > > >>>> I realized that this aspect of mock handling might be missing
from our
> > > >>>> previous discussions. I wanted to bring it up as part of the
broader
> > > >>>> conversation about test styles—particularly how we balance
IDE/tooling
> > > >>>> support with readability and style consistency.
> > > >>>>
> > > >>>> Curious to hear your thoughts on this!
> > > >>>>
> > > >>>> @ash @potiuk
> > > >>>>
> > > >>>> 2025년 7월 6일 (일) 오후 8:09, Kyungjun Lee <ky...@gmail.com>님이 작성:
> > > >>>>
> > > >>>>> Thank you @Potiuk for pointing out the intent behind the “one
assert
> > > >> per
> > > >>>>> test” principle, and @ash for highlighting how using dedicated
mock
> > > >>> assert
> > > >>>>> functions can make the code easier to read and understand.
These were
> > > >>>>> perspectives I hadn’t fully considered, and I really appreciate
you
> > > >>> sharing
> > > >>>>> them.
> > > >>>>>
> > > >>>>> Thanks to your input, I was able to read more materials and
broaden my
> > > >>>>> thinking on the topic. That said, my original focus was more on
the
> > > >> idea
> > > >>>>> that sticking to plain assert statements lowers the entry
barrier for
> > > >>> new
> > > >>>>> contributors—because they don’t have to learn multiple assertion
> > > >> styles.
> > > >>>>>
> > > >>>>> Still, as @Potiuk mentioned, I’ll put more thought into making
the
> > > >>> testing
> > > >>>>> guidelines clearer and more concrete—especially since that helps
> > > >>> AI-based
> > > >>>>> tools as well 😄
> > > >>>>>
> > > >>>>> For reference, here’s one of the articles I read:
> > > >>>>> https://medium.com/@kentbeck_7670/test-desiderata-94150638a4b3
> > > >>>>>
> > > >>>>> Thank you to everyone who took part in this discussion.
> > > >>>>>
> > > >>>>> 2025년 7월 6일 (일) 오후 3:42, Ash Berlin-Taylor <as...@apache.org>님이
작성:
> > > >>>>>
> > > >>>>>> I personally find the dedicated functions way easier to read
the
> > > >> intent
> > > >>>>>> behind, it’s one function/statement vs 3. More so when you
don’t care
> > > >>> about
> > > >>>>>> the order of calls, just that something was called (where to
do this
> > > >>>>>> manually we’d need to reimplement the helper function)
> > > >>>>>>
> > > >>>>>> Additionally pytest already rewrites those to have nicer error
> > > >>> messages,
> > > >>>>>> but the dedicated mock assert finding are much easier to read
the
> > > >> code
> > > >>> and
> > > >>>>>> understand the intent to me, so I’i am for staying with the
dedicated
> > > >>>>>> assert functions
> > > >>>>>>
> > > >>>>>> -ash
> > > >>>>>>
> > > >>>>>>> On 5 Jul 2025, at 13:30, Kyungjun Lee <ky...@gmail.com>
> > > >>> wrote:
> > > >>>>>>>
> > > >>>>>>> I’ve learned a lot of things I didn’t know before.
> > > >>>>>>> Thank you so much for all your help — I really appreciate it.
> > > >>>>>>> I’ll get started on this right away!
> > > >>>>>>>
> > > >>>>>>> 2025년 7월 5일 (토) 오후 9:18, Jarek Potiuk <ja...@potiuk.com>님이 작성:
> > > >>>>>>>
> > > >>>>>>>>> Haha ... I'm curious — which part sounded like ChatGPT
style?
> > > >>>>>>>> English isn't my first language, so I did get a little help
from
> > > >> it.
> > > >>>>>>>>
> > > >>>>>>>> That whole paragraph :) .
> > > >>>>>>>>
> > > >>>>>>>>>> Sure! Since you asked for how the test *should* be
written, I
> > > >> took
> > > >>>>>> the
> > > >>>>>>>> opportunity to clean it up using a more pytest-native style
while
> > > >>> also
> > > >>>>>>>> fixing the mock order issue.
> > > >>>>>>>>
> > > >>>>>>>> "Sure! Since you asked ..." sounds like an AI bot.
> > > >>>>>>>>
> > > >>>>>>>>> That got me thinking — what do you think about adding a
guideline
> > > >>>>>>>> document
> > > >>>>>>>> for writing tests, similar to how we have a coding style
guide?
> > > >>>>>>>>
> > > >>>>>>>> Absolutely - we already have some "seed' of it "Writing
tests"
> > > >>>>>> chapter in
> > > >>>>>>>> contributing guideline, but we could definitely make it more
> > > >>> detailed.
> > > >>>>>>>>
> > > >>>>>>>>
> > > >>>>>>>>
> > > >>>>>>
> > > >>>
> > > >>
https://github.com/apache/airflow/blob/main/contributing-docs/testing/unit_tests.rst#writing-unit-tests
> > > >>>>>>>>
> > > >>>>>>>> And - speaking of AI - this is becoming more and more
important to
> > > >>>>>> describe
> > > >>>>>>>> any common rules we have and context - so that using Agentic
AI
> > > >>> yields
> > > >>>>>>>> better results. Kaxil already added
> > > >>>>>>>> https://github.com/apache/airflow/blob/main/AGENTS.md which
> > > >>> describes
> > > >>>>>>>> context for coding agents lile Codex - and we could improve
it and
> > > >>> link
> > > >>>>>>>> more docs from our repo if they get more of our agreed
> > > >> "conventions"
> > > >>> -
> > > >>>>>> then
> > > >>>>>>>> Agents would get it as context and their generated code
would be
> > > >>>>>> consistent
> > > >>>>>>>> with what we describe there.
> > > >>>>>>>>
> > > >>>>>>>> In a way - I think having a good documentation on processes,
tools
> > > >>> and
> > > >>>>>>>> conventions was always something I've been after, but with
the
> > > >>> Agentic
> > > >>>>>>>> workflows it might significantly boost the quality of
generated
> > > >> code
> > > >>>>>> if we
> > > >>>>>>>> have more of those conventions and guidelines described.
> > > >>>>>>>>
> > > >>>>>>>> So .... ABSOLUTELY ... the more we describe in there, the
better.
> > > >> And
> > > >>>>>> we
> > > >>>>>>>> have no more excuse that "anyhow no-one reads it" - because
the
> > > >>> coding
> > > >>>>>>>> agents WILL be reading it and acting accordingly. So I think
this
> > > >> is
> > > >>> a
> > > >>>>>> very
> > > >>>>>>>> good investment to make.
> > > >>>>>>>>
> > > >>>>>>>> J.
> > > >>>>>>>>
> > > >>>>>>>>
> > > >>>>>>>>
> > > >>>>>>>>
> > > >>>>>>>>
> > > >>>>>>>>> On Sat, Jul 5, 2025 at 2:07 PM Kyungjun Lee <
> > > >>> kyungjunlee...@gmail.com
> > > >>>>>>>
> > > >>>>>>>>> wrote:
> > > >>>>>>>>>
> > > >>>>>>>>> Haha ... I'm curious — which part sounded like ChatGPT
style?
> > > >>>>>>>>> English isn't my first language, so I did get a little help
from
> > > >> it.
> > > >>>>>>>>>
> > > >>>>>>>>> But thank you — I actually learned something new from your
> > > >> comment!
> > > >>>>>>>>> That got me thinking — what do you think about adding a
guideline
> > > >>>>>>>> document
> > > >>>>>>>>> for writing tests, similar to how we have a coding style
guide? It
> > > >>>>>> might
> > > >>>>>>>>> help ensure consistency across the Airflow codebase when it
comes
> > > >> to
> > > >>>>>>>>> testing styles as well.
> > > >>>>>>>>>
> > > >>>>>>>>> 2025년 7월 5일 (토) 오후 8:52, Jarek Potiuk <ja...@potiuk.com>님이
작성:
> > > >>>>>>>>>
> > > >>>>>>>>>> But of course - i'd love to hear what others think - it's
not a
> > > >>> "very
> > > >>>>>>>>>> strong" opinion.
> > > >>>>>>>>>>
> > > >>>>>>>>>> On Sat, Jul 5, 2025 at 1:48 PM Jarek Potiuk <
ja...@potiuk.com>
> > > >>>>>> wrote:
> > > >>>>>>>>>>
> > > >>>>>>>>>>> Cool. That's what I wanted to see.
> > > >>>>>>>>>>>
> > > >>>>>>>>>>> By the way - not that there's anything wrong - but was the
> > > >> answer
> > > >>>>>>>>> written
> > > >>>>>>>>>>> by AI initially ? The first paragraph looks suspiciously
like
> > > >> Chat
> > > >>>>>>>> GPT
> > > >>>>>>>>>>> answer :D ?
> > > >>>>>>>>>>>
> > > >>>>>>>>>>> Comment from my side: I personally prefer the original
style.
> > > >> It's
> > > >>>>>>>> more
> > > >>>>>>>>>>> concise and it is easier to read - you see as if the call
was
> > > >>>>>>>> actually
> > > >>>>>>>>>>> written down. Also this is quite a bit too many
assertions in
> > > >> the
> > > >>>>>>>>> second
> > > >>>>>>>>>>> case and it takes a lot of mental effort to understand
what
> > > >>> actually
> > > >>>>>>>> is
> > > >>>>>>>>>>> being asserted.
> > > >>>>>>>>>>>
> > > >>>>>>>>>>> There is a "school" of writing unit tests that every test
should
> > > >>>>>> have
> > > >>>>>>>>> ONE
> > > >>>>>>>>>>> assertion only. Always. I think it is a bit extreme, and
I do
> > > >> not
> > > >>>>>>>>> follow
> > > >>>>>>>>>> it
> > > >>>>>>>>>>> myself but I think it is also a kind of good direction to
have
> > > >> ->
> > > >>>>>> the
> > > >>>>>>>>>> fewer
> > > >>>>>>>>>>> assertions you have in your test, the better (I think).
> > > >>>>>>>>>>>
> > > >>>>>>>>>>> I think tests should be mostly optimized for easiness of
reading
> > > >>> and
> > > >>>>>>>>>>> understanding what is being tested - and it's just not
that easy
> > > >>> in
> > > >>>>>>>> the
> > > >>>>>>>>>>> second case.
> > > >>>>>>>>>>>
> > > >>>>>>>>>>> J.
> > > >>>>>>>>>>>
> > > >>>>>>>>>>>
> > > >>>>>>>>>>>
> > > >>>>>>>>>>> On Sat, Jul 5, 2025 at 1:39 PM Kyungjun Lee <
> > > >>>>>>>> kyungjunlee...@gmail.com>
> > > >>>>>>>>>>> wrote:
> > > >>>>>>>>>>>
> > > >>>>>>>>>>>> Sure! Since you asked for how the test *should* be
written, I
> > > >>> took
> > > >>>>>>>> the
> > > >>>>>>>>>>>> opportunity to clean it up using a more pytest-native
style
> > > >> while
> > > >>>>>>>> also
> > > >>>>>>>>>>>> fixing the mock order issue.
> > > >>>>>>>>>>>>
> > > >>>>>>>>>>>> Here’s the updated test:
> > > >>>>>>>>>>>>
> > > >>>>>>>>>>>> ```python
> > > >>>>>>>>>>>>
> > > >>>>>>>>>>>> @pytest.mark.parametrize(
> > > >>>>>>>>>>>> argnames="conn_id, account_id",
> > > >>>>>>>>>>>> argvalues=[(ACCOUNT_ID_CONN, None), (NO_ACCOUNT_ID_CONN,
> > > >>>>>>>>>> ACCOUNT_ID)],
> > > >>>>>>>>>>>> ids=["default_account", "explicit_account"],
> > > >>>>>>>>>>>> )
> > > >>>>>>>>>>>> @patch.object(DbtCloudHook, "run")
> > > >>>>>>>>>>>> @patch.object(DbtCloudHook, "_paginate")
> > > >>>>>>>>>>>> def test_get_account(self, mock_paginate, mock_http_run,
> > > >> conn_id,
> > > >>>>>>>>>>>> account_id):
> > > >>>>>>>>>>>> hook = DbtCloudHook(conn_id)
> > > >>>>>>>>>>>> hook.get_account(accou
[message truncated...]
