Fix Python test dependencies

[fcollonval]

References

Pytest fixtures for Jupyter are now part of a separate package pytest-jupyter.

Code changes

Add the new test dependency
Remove unused ui-tests optional group dependency

User-facing changes

N/A

Backwards-incompatible changes

N/A

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[blink1073]

👍🏼

[jtpio]

Looks like some Python tests (3.7?) give the following:

ERROR: Could not find a version that satisfies the requirement pytest-jupyter[server]; extra == "test" (from jupyterlab[dev,test]) (from versions: none)

[blink1073]

Ah, the plugin is 3.8+ currently

[fcollonval]

Yep I opened jupyter-server/pytest-jupyter#29

Is it possible to lower the plugin package requirement or should we bump the minimal tested version to 3.8?

[blink1073]

Done: https://github.com/jupyter-server/pytest-jupyter/releases/tag/v0.5.1

[fcollonval]

The error on js-services needs to be addressed. But I'm merging as is as it solves the Python jobs to keep the ball rolling for other PRs.

[fcollonval]

@meeseeksdev please backport to 3.6.x

[lumberbot-app]

Owee, I'm MrMeeseeks, Look at me.

There seem to be a conflict, please backport manually. Here are approximate instructions:

1. Checkout backport branch and update it.

git checkout 3.6.x
git pull

2. Cherry pick the first parent branch of the this PR on top of the older branch:

git cherry-pick -x -m1 168a53dd856f48bb2ce15cc5078bd132829d2efb

3. You will likely have some merge/cherry-pick conflict here, fix them and commit:

git commit -am 'Backport PR #13508: Fix Python test dependencies'

4. Push to a named branch:

git push YOURFORK 3.6.x:auto-backport-of-pr-13508-on-3.6.x

5. Create a PR against branch 3.6.x, I would have named this PR:

"Backport PR #13508 on branch 3.6.x (Fix Python test dependencies)"

And apply the correct labels and milestones.

Congratulations — you did some good work! Hopefully your backport PR will be tested by the continuous integration and merged soon!

Remember to remove the Still Needs Manual Backport label once the PR gets merged.

If these instructions are inaccurate, feel free to suggest an improvement.

[fcollonval]

Actually the js-services failures appeared before this one; see #13460

[jtpio]

Looks like some Python checks are failing on master after this PR was merged (168a53d): https://github.com/jupyterlab/jupyterlab/actions/runs/3583498754/jobs/6028998723

[blink1073]

Could be fixed by https://github.com/jupyter-server/pytest-jupyter/releases/tag/v0.5.3

[jtpio]

OK thanks, so maybe just re-running the checks would be fine.

[fcollonval]

Actually no - the renamed in jupyter-server/pytest-jupyter#32 is impacting use because I modified the fixture name in this PR.

[fcollonval]

I'll open a follow-up fix