Add packaged Java tests to nightly tests

[paul-aiyedun]

Description

• Move the java-build artifact download into ci/test_packaged_java.sh so PR and nightly runs call the same script.

• Download cudf_java_$(arch)_cu$(cuda_major) via rapids-download-from-github.

• Replace the inline pr.yaml java-tests job with shared-workflows/custom-job.yaml.

• Add java-build-matrix and java-tests to test.yaml.

Checklist

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

[copy-pr-bot]

Auto-sync is disabled for draft pull requests in this repository. Workflows must be run manually.

Contributors can view more details about this message here.

[paul-aiyedun]

/ok to test fa976dd

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: 1d92e44e-6970-4c68-bf73-4a8b96aee067

📥 Commits

Reviewing files that changed from the base of the PR and between bd37009 and fb1014e.

📒 Files selected for processing (3)

• .github/workflows/pr.yaml
• .github/workflows/test.yaml
• ci/test_packaged_java.sh

Included review availability: Your plan provides up to 12 included reviews per hour; 10 remain after this review.

---

📝 Walkthrough

Summary by CodeRabbit

• Tests
  • Expanded automated validation for packaged Java artifacts across supported CUDA versions, architectures, and build variants.
  • Improved test setup to automatically locate and verify the appropriate Java package when no artifact is specified.
  • Standardized Java package testing across pull-request and continuous-integration workflows for more consistent coverage.

Walkthrough

Changes

Java package testing

Layer / File(s)	Summary
Java artifact resolution ci/test_packaged_java.sh	The script resolves a CUDA- and architecture-specific JAR when JAVA_JAR is unset. It validates the CUDA version, host architecture, and resolved file.
Workflow matrix integration .github/workflows/test.yaml, .github/workflows/pr.yaml	The test workflow derives Java configurations from the C++ build matrix. Pull-request tests use the shared reusable workflow with the packaged Java test script.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: ⚪ Minimal · up to fb101

This PR aligns packaged Java testing across pull-request and nightly workflows; no actionable merge-blocking risk remains, so it is merge-ready after normal checks and review.

Suggested reviewers: jameslamb, bdice

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: adding packaged Java tests to nightly testing.
Description check	✅ Passed	The description directly explains the workflow, artifact download, and shared test-script changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

_{Comment @coderabbitai help to get the list of available commands.}

[bdice]

I discussed this with @paul-aiyedun over a call and I think this makes sense.

[paul-aiyedun]

/merge