TEST: Reuse CUDA interface test inputs

[vyasr]

Description

Reuses each CUDA-interface source array across dtype checks while preserving every shape, dtype conversion, and assertion.

Checklist

• 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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📥 Commits

Reviewing files that changed from the base of the PR and between e78c254 and f32df19.

📒 Files selected for processing (1)

• python/cudf/cudf/tests/private_objects/test_buffer.py

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📝 Summary

Summary by CodeRabbit

• Tests

  • Updated dtype buffer coverage to iterate through supported data types within the test.
  • Simplified the test interface while preserving validation across supported dtypes.

• Chores

  • Updated the SPDX copyright year range.

Walkthrough

The buffer test now evaluates four supported dtypes through an internal loop. The test signature no longer accepts a separate dtype argument. The SPDX copyright range includes 2026.

Changes

Buffer dtype validation

Layer / File(s)	Summary
Internal dtype coverage python/cudf/cudf/tests/private_objects/test_buffer.py	The test loops over uint8, int8, float32, and int32, then validates each converted array against its byte view. The SPDX notice includes 2026.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Suggested reviewers: mroeschke

Merge Risk: ⚪ Minimal · up to f32df

The updated test retains coverage for each supported dtype and introduces no actionable merge risk.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 1 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies a test change that reuses CUDA interface test inputs. It matches the main change in the pull request.
Description check	✅ Passed	The description directly explains the reuse of CUDA-interface source arrays across dtype checks and matches the changeset.
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.

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