test: Install pytest-env and hypothesis in test_narwhals.sh

[MarcoGorelli]

Update test_narwhals.sh to install pytest-env and hypothesis

In Narwhals these are pulled in by using --group test, but that requires uv (which cuDF doesn't use)

Demo of this working: https://www.kaggle.com/code/marcogorelli/narwhals-pre-release-test-cudf/notebook?scriptVersionId=228712396

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• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

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[mroeschke]

I do see these dependencies already being downloaded in our test_narwhals.sh job e.g https://github.com/rapidsai/cudf/actions/runs/13956935763/job/39071672911?pr=18331

Requirement already satisfied: hypothesis in /opt/conda/envs/test/lib/python3.12/site-packages (from narwhals==1.31.0) (6.129.3)
...
Collecting pytest-env (from narwhals==1.31.0)
  Downloading pytest_env-1.1.5-py3-none-any.whl.metadata (5.2 kB)

And they are specified in your dependency group too (on the stable branch)

https://github.com/narwhals-dev/narwhals/blob/668bbf698e5dee67576b9a003144d03f15b65310/pyproject.toml#L46-L47

Is this going to change instead?

[MarcoGorelli]

And they are specified in your dependency group too (on the stable branch)

Yes but this PR changed it on main: narwhals-dev/narwhals#2238

Adding pytest-env and hypothesis in here is technically redundant, but future proofs your CI for when we'll make the next release (which happens every Monday, so in not too long)

[mroeschke]

Ah I see thanks.

Just FYI, we are also thinking of starting to test off Narwhals tags instead of the stable branch to mirror what we do for the pandas tests #18191, but this will still be useful if/when we start pinning to the tag where this changes

[mroeschke]

Ok thanks could you target this PR to the branch-25.06 branch instead? RAPIDS is in the process of releasing soon as well

[MarcoGorelli]

done, thanks!

[MarcoGorelli]

@mroeschke gentle ping (else CI won't be green 🥦 , we're releasing today)

[mroeschke]

/ok to test

[vyasr]

/ok to test