[typescript-migration] test/timepicker_test.test.js and some tests

[yuki0410-dev]

name: Migrate test/timepicker_test.test.js and some tests

Description

Linked issue: #4700

Changes test/timepicker_test.test.js and some tests ware migrated to ts

Contribution checklist

• [x] I have followed the contributing guidelines.
• [x] I have added sufficient test coverage for my changes.
• [x] I have formatted my code with Prettier and checked for linting issues with ESLint for code readability.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 96.67%. Comparing base (6580b01) to head (8eba778).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #4825 +/- ## ======================================= Coverage 96.67% 96.67% ======================================= Files 28 28 Lines 2977 2977 Branches 1285 1292 +7 ======================================= Hits 2878 2878 Misses 99 99 ```

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