[Feature Request]: Update unit test coverage to be at min 80% coverage

### Feature description

Please make sure unit tests coverage is 80% or more.

https://insightsengineering.github.io/teal.widgets/main/coverage-report/

<img width="1151" height="655" alt="Image" src="https://github.com/user-attachments/assets/f79dc865-f644-4f41-a1c0-f8054de38aa8" />
