Add tests for useQuizResources and update functionality for annotation and loading states

[GautamBytes]

Summary

This PR adds unit tests for the new useQuizResources module. The module extends the already-tested useFetchTree module, so in these tests the useFetchTree functionality is mocked to return a suitable data structure. The tests verify that:

• The helper function annotateTopicsWithDescendantCounts correctly annotates topics with their descendant assessment counts (or filters them out if none are present).
• Both fetchQuizResources and fetchMoreQuizResources functions pass their returned data through the annotation function before updating the resources.
• The loading state is correctly updated during the fetch operations.

Manual testing was performed by running the full test suite locally, and all tests passed.

References

Addresses #12033

Reviewer guidance

• Verify that the tests for annotateTopicsWithDescendantCounts cover both successful annotation and error handling.
• Check that the tests for fetchQuizResources and fetchMoreQuizResources ensure the final resources state matches the expected annotated output.
• Confirm that the loading states are correctly updated during fetch operations.
• Note that the useFetchTree module is mocked to isolate the behavior of useQuizResources.

[github-actions]

Build Artifacts

Asset type	Download link
PEX file	kolibri-0.18.0a1.dev0_git.43.g67026b71.pex
Windows Installer (EXE)	kolibri-0.18.0a1.dev0+git.43.g67026b71-windows-setup-unsigned.exe
Debian Package	kolibri_0.18.0a1.dev0+git.43.g67026b71-0ubuntu1_all.deb
Mac Installer (DMG)	kolibri-0.18.0a1.dev0+git.43.g67026b71.dmg
Android Package (APK)	kolibri-0.18.0a1.dev0+git.43.g67026b71-0.1.4-debug.apk
Raspberry Pi Image	kolibri-pi-image-0.18.0a1.dev0+git.43.g67026b71.zip
TAR file	kolibri-0.18.0a1.dev0+git.43.g67026b71.tar.gz
WHL file	kolibri-0.18.0a1.dev0+git.43.g67026b71-py2.py3-none-any.whl

[nucleogenesis]

Thank you for the test suite - the tests look okay to me on my first read.

I wonder if the tests would pass without the changes made to useQuizResources - I'm not seeing the purpose for the changes to the implementation there so clarification there would be appreciated.

Why did you remove all of the JSDoc definitions from useQuizResources? To get this ready for merge, please undo the diff on useQuizResources altogether and see if the tests pass - if they don't, then please revert all changes to comments in the file and only commit the necessary implementation changes to pass the test suite.

Then we can look for some manual testing of the underlying components.

[nucleogenesis]

What is the purpose of defining the api in a separate object here?

[GautamBytes]

Hi @nucleogenesis , did the suggested changes . You can have a look and confirm if it meets all requirements or needs further improvements. Thanks!