Add unit tests for PageListItemLabelsUseCase

[malinajirka]

Adds unit tests for #11278

Review instruction

1. Review the code
2. Wait until Issue/11128 page label colors #11280 gets merged
3. Change target branch to feature/master-pages-offline-support
4. Remove the "Not ready for merge" label
5. Merge the PR

PR submission checklist:

• I have considered adding unit tests where possible.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

[peril-wordpress-mobile]

You can test the changes on this Pull Request by downloading the APK here.

[jd-alexander]

Hi @malinajirka great test suite! It works as intended! Based on the comments I made on the page item labels PR, this one might get updated with more tests depending on your thoughts. So once you respond about to this, we can move forward here.

[malinajirka]

It works as intended! Based on the comments I made on the page item labels PR, this one might get updated with more tests depending on your thoughts. So once you respond about to this, we can move forward here.

Tests updated in e8ce3a0. I decided to replace the static access to UploadUtils with an injectable wrapper. These tests are supposed to be unit test testing only CreatePageListItemLabelsUseCase I decided to remove some of the tests.

I created a ticket #11285 - for adding unit tests for the UploadUtils method.

It's ready for another round, thanks!

[jd-alexander]

Thanks for these changes @malinajirka! Looks good!

For some reason when I am running the test locally I am getting this exception.

org.mockito.exceptions.base.MockitoException: 
Mockito cannot mock this class: class org.wordpress.android.ui.uploads.UploadUtilsWrapper.
Can not mock final classes with the following settings :
 - explicit serialization (e.g. withSettings().serializable())
 - extra interfaces (e.g. withSettings().extraInterfaces(...))

You are seeing this disclaimer because Mockito is configured to create inlined mocks.
You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc.

I am going to look into my setup to see if it might be causing the issue; possibly the JDK. Will merge these changes since the test are passing fine 🚢

[malinajirka]

For some reason when I am running the test locally I am getting this exception.

That's quite weird. I have no idea what might be causing this issue. I've double checked it and I don't see such exception on my end.