[pawicao]

Note

This pull request was authored by AI on behalf of @pawicao.

Summary

Stacked on #10919.

The real useSharedValue keeps one shared value for the lifetime of the component. The Jest mock created a new object on every call, so the shared value changed identity on every render. Code that used it as a useEffect or useMemo dependency ran again on every render under the mock. I moved the mock shared value creation into the useState initializer, so each component keeps one shared value.

Test plan

I added a test to __tests__/mock.useSharedValue.test.tsx that re-renders the hook and compares the results. Before the fix it failed, after the fix it passes. The full reanimated Jest suite passes.

Changelog

• I added a changelog fragment with yarn changelog:add for each changed package, or this PR does not change react-native-reanimated or react-native-worklets.

[coderabbitai]

Caution

Review failed

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Commits

Reviewing files that changed from the base of the PR and between 2087932 and 68cc4e1.

Files selected for processing: 1

• packages/react-native-reanimated/src/mock.ts

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Walkthrough

The Jest mock of useSharedValue now creates its shared-value proxy with a lazy useState initializer and returns the stored proxy. The proxy retains its existing marker, value accessors, setter behavior, and support for assigning to value. A test checks that the returned object remains identical after a hook rerender. A changelog entry records the update.

Possibly related PRs

• software-mansion/react-native-reanimated#11003: Updates the Jest useSharedValue mock’s SharedValue contract, including modify and listener methods.
• software-mansion/react-native-reanimated#10713: Adds Animated.Text behavior that tracks shared-value instances across renders and uses stable per-value keys.

Priority: Not assessed

Change: Bug fix

Merge Risk: Minimal · up to 68cc4

The mock now keeps the same shared value across rerenders. No issue identified here prevents merging after normal checks.

Pre-merge checks: 4

Check name	Status	Explanation
Title check		The title clearly and concisely describes the main change: preserving stable shared value identity in the Reanimated Jest mock.
Description check		The description explains the identity bug, the implementation change, the test added, and the changelog update. It is directly related to the changeset.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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