test(design): add test cases

[jikkai]

close #xxx

Pull Request Checklist

• [ ] Related tickets or issues have been linked in the PR description (or missing issue).
• [ ] Naming convention is followed (do please check it especially when you created new plugins, commands and resources).
• [ ] Unit tests have been added for the changes (if applicable).
• [ ] Breaking changes have been documented (or no breaking changes introduced in this PR).

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 42.85714% with 4 lines in your changes missing coverage. Please review.

Project coverage is 27.03%. Comparing base (8f2b210) to head (33a462f).

Files	Patch %	Lines
...sign/src/components/cascader-list/CascaderList.tsx	33.33%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #2674 +/- ## ========================================== + Coverage 26.96% 27.03% +0.06% ========================================== Files 1607 1605 -2 Lines 86939 86920 -19 Branches 18330 18327 -3 ========================================== + Hits 23444 23499 +55 + Misses 63495 63421 -74 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[github-actions[bot]]

View Deployment

📑 Examples	📚 Storybook
🔗 Preview link	🔗 Preview link