chore(polling-controller): replace Sinon with Jest fake timers#7966
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## Explanation <!-- Thanks for your contribution! Take a moment to answer these questions so that reviewers have the information they need to properly understand your changes: * What is the current state of things and why does it need to change? * What is the solution your changes offer and how does it work? * Are there any changes whose purpose might not obvious to those unfamiliar with the domain? * If your primary goal was to update one package but you found you had to update another one along the way, why did you do so? * If you had to upgrade a dependency, why did you do so? --> ## References <!-- Are there any issues that this pull request is tied to? Are there other links that reviewers should consult to understand these changes better? Are there client or consumer pull requests to adopt any breaking changes? For example: * Fixes #12345 * Related to #67890 --> ## Checklist - [ ] I've updated the test suite for new or updated code as appropriate - [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate - [ ] I've communicated my changes to consumers by [updating changelogs for packages I've changed](https://github.com/MetaMask/core/tree/main/docs/processes/updating-changelogs.md) - [ ] I've introduced [breaking changes](https://github.com/MetaMask/core/tree/main/docs/processes/breaking-changes.md) in this PR and have prepared draft pull requests for clients and consumer packages to resolve them <!-- CURSOR_SUMMARY --> --- > [!NOTE] > **Low Risk** > Test-only refactor plus dependency removal; main risk is subtle timer-behavior differences causing flaky or changed test outcomes. > > **Overview** > Test timing in `@metamask/polling-controller` is migrated from Sinon to Jest: Sinon is removed from `devDependencies`, tests now use `jest.useFakeTimers()`/`jest.useRealTimers()`, and interval-based assertions in `StaticIntervalPollingController.test.ts` advance time via the shared `jestAdvanceTime` helper. > > `yarn.lock` is updated accordingly to drop the `sinon` dependency. > > <sup>Written by [Cursor Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit c94eda7. This will update automatically on new commits. Configure [here](https://cursor.com/dashboard?tab=bugbot).</sup> <!-- /CURSOR_SUMMARY -->
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Explanation
References
Checklist
Note
Low Risk
Test-only refactor plus dependency removal; main risk is subtle timer-behavior differences causing flaky or changed test outcomes.
Overview
Test timing in
@metamask/polling-controlleris migrated from Sinon to Jest: Sinon is removed fromdevDependencies, tests now usejest.useFakeTimers()/jest.useRealTimers(), and interval-based assertions inStaticIntervalPollingController.test.tsadvance time via the sharedjestAdvanceTimehelper.yarn.lockis updated accordingly to drop thesinondependency.Written by Cursor Bugbot for commit c94eda7. This will update automatically on new commits. Configure here.