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test(query-core/utils,vue-query/mutationOptions): assert reference identity with 'toBe'#11048

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sukvvon merged 1 commit into
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test/pass-through-reference-identity
Jul 11, 2026
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test(query-core/utils,vue-query/mutationOptions): assert reference identity with 'toBe'#11048
sukvvon merged 1 commit into
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test/pass-through-reference-identity

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@sukvvon

@sukvvon sukvvon commented Jul 11, 2026

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🎯 Changes

keepPreviousData and mutationOptions are pure pass-through helpers that return the exact same reference they receive (return previousData / return options). Their tests asserted the return value with toEqual/toStrictEqual, which only compares by value — so they would still pass even if the helper wrongly returned a copy (e.g. { ...options }), missing the "return as is" contract. This switches them to toBe, which asserts reference identity — the actual contract.

✅ Checklist

🚀 Release Impact

  • This change is docs/CI/dev-only (no release).

Summary by CodeRabbit

  • Tests
    • Updated automated tests to verify that returned and provided objects preserve their original references.
    • Improved coverage for data retention and mutation option handling without changing end-user functionality.

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nx-cloud Bot commented Jul 11, 2026

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View your CI Pipeline Execution ↗ for commit 794dc88

Command Status Duration Result
nx affected --targets=test:sherif,test:knip,tes... ✅ Succeeded 7m 48s View ↗
nx run-many --target=build --exclude=examples/*... ✅ Succeeded 1m 52s View ↗

☁️ Nx Cloud last updated this comment at 2026-07-11 05:22:48 UTC

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Review Change Stack

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info
⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: e8bca3c8-9311-4e11-970c-3b27b03f7be4

📥 Commits

Reviewing files that changed from the base of the PR and between 7bc3415 and 794dc88.

📒 Files selected for processing (2)
  • packages/query-core/src/__tests__/utils.test.tsx
  • packages/vue-query/src/__tests__/mutationOptions.test.ts

📝 Walkthrough

Walkthrough

Tests for keepPreviousData and mutationOptions now verify that returned objects preserve the same reference identity as their inputs.

Changes

Reference identity tests

Layer / File(s) Summary
Reference identity assertions
packages/query-core/src/__tests__/utils.test.tsx, packages/vue-query/src/__tests__/mutationOptions.test.ts
Changed object comparisons from deep equality to reference equality in three unit test assertions.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5
✅ Passed checks (5 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly matches the main change: switching tests to assert reference identity with toBe.
Description check ✅ Passed The description follows the template and includes the changes, checklist, and release impact sections.
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 docstrings
  • Create stacked PR
  • Commit on current branch
🧪 Generate unit tests (beta)
  • Create PR with unit tests
  • Commit unit tests in branch test/pass-through-reference-identity

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@sukvvon sukvvon self-assigned this Jul 11, 2026
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🚀 Changeset Version Preview

No changeset entries found. Merging this PR will not cause a version bump for any packages.

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commit: 794dc88

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size-limit report 📦

Path Size
react full 12.13 KB (0%)
react minimal 9.08 KB (0%)

@sukvvon sukvvon merged commit 0cdfdea into main Jul 11, 2026
9 checks passed
@sukvvon sukvvon deleted the test/pass-through-reference-identity branch July 11, 2026 05:52
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