test(fab): add test cases of fab

[Boomkaa]

🤔 这个 PR 的性质是？

• 日常 bug 修复
• 新特性提交
• 文档改进
• 演示代码改进
• 组件样式/交互改进
• CI/CD 改进
• 重构
• 代码风格优化
• 测试用例
• 分支合并
• 其他

🔗 相关 Issue

#697

💡 需求背景和解决方案

📝 更新日志

• fix(组件名称): 处理问题或特性描述 ...

• 本条 PR 不需要纳入 Changelog

☑️ 请求合并前的自查清单

⚠️ 请自检并全部勾选全部选项。⚠️

• 文档已补充或无须补充
• 代码演示已提供或无须提供
• TypeScript 定义已补充或无须补充
• Changelog 已提供或无须提供

[codecov-commenter]

Codecov Report

❌ Patch coverage is 25.00000% with 18 lines in your changes missing coverage. Please review.
✅ Project coverage is 56.78%. Comparing base (02b774b) to head (e22d996).
⚠️ Report is 369 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/fab/Fab.tsx	25.00%	18 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           develop     #861       +/-   ##
============================================
+ Coverage     6.93%   56.78%   +49.84%     
============================================
  Files          400      288      -112     
  Lines         4241     7367     +3126     
  Branches       990     1987      +997     
============================================
+ Hits           294     4183     +3889     
+ Misses        3947     3184      -763     

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[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/tdesign-mobile-react@861

commit: e22d996

[github-actions]

[anlyyao]

调示例的原因是？

[Boomkaa]

style的设置没有必要就去掉了，看小程序组件的fab是这种展示就改成了这样。