Add unit tests for WidgetBlocks.js and improve test coverage (#4914)

[severe77]

This pull request adds unit tests for WidgetBlocks.js.

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What’s included

• Tests to verify widget blocks are registered correctly
• Coverage for core widget setup logic (e.g. Tempo, Sampler, Status, etc.)
• Ensures setupWidgetBlocks runs without errors in a test environment

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Purpose

WidgetBlocks.js previously lacked direct unit test coverage.
These tests help validate block registration behavior and reduce the risk of regressions.

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Testing

• Tests added using the existing Jest setup
• All tests pass locally

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Attached test coverage screenshot

The screenshot below shows the updated Jest test coverage

Notes

• No production logic was changed
• Follows existing test patterns used in other block test files
• Improves test coverage and overall reliability

Fixes #4914

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[7se7en72025]

Great work on expanding the test coverage! 🚀 @severe77

I noticed the ESLint check failed due to some formatting inconsistencies in js/blocks/WidgetBlocks.js. You should be able to fix this automatically by running:

npx prettier --write js/blocks/WidgetBlocks.js

Once you push that change, the build should pass.

Cheers to opensource !!

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.