[Bug]: Frontend changes cause Python unit tests workflow to fail but not frontend workflow

[neubig]

Is there an existing issue for the same bug?

• I have checked the existing issues.

Describe the bug and reproduction steps

Sometimes changes to the frontend cause Python unit tests to fail, but do not cause the frontend workflows to fail.

Here is an example of workflows from the same commit:

• Python Unit Tests (failing): https://github.com/All-Hands-AI/OpenHands/actions/runs/12106942009/job/33753259929?pr=5342
• Lint Frontend (passing): https://github.com/All-Hands-AI/OpenHands/actions/runs/12106942006/job/33753259941?pr=5342
• FE Unit Tests (passing): https://github.com/All-Hands-AI/OpenHands/actions/runs/12106942002/job/33753259944?pr=5342

These failures were caused by the typescript changes in this commit: fc6b4af

If we look at the changes in the commit, they are related to the frontend, not related to Python.

Building frontend...

> [email protected] build
> npm run make-i18n && tsc && remix vite:build


> [email protected] make-i18n
> node scripts/make-i18n-translations.cjs

src/components/chat-input.tsx(90,25): error TS18047: 'textareaRef.current' is possibly 'null'.
make[1]: *** [Makefile:188: build-frontend] Error 2
make: *** [Makefile:29: build] Error 2
Error: Process completed with exit code 2.

It shouldn't be the case that frontend changes cause frontend tests to pass but the Python Unit Test workflow to fail. All bad frontend changes should be caught by frontend testing workflows.

To fix this we can gradually create a PR to fix these issues:

1. carefully read all reference materials, the existing worfklows for "Lint / Lint frontend", "Run Frontend Unit Tests / FE Unit Tests", and "Python Unit Tests", as well as the output of the passing/failed github actions
2. create a dummy PR that uses the code in the above commit to see if you can reproduce the issue of the Python Unit Tests workflow failing but the frontend tests passing on this small frontend bug
3. try to fix the existing frontend workflows so that they also fail on this error
4. revert all changes to the typescript files and make sure that all workflows now pass

OpenHands Installation

Docker command in README

OpenHands Version

No response

Operating System

None

Logs, Errors, Screenshots, and Additional Context

No response

[github-actions]

OpenHands started fixing the issue! You can monitor the progress here.

[github-actions]

A potential fix has been generated and a draft PR #5344 has been created. Please review the changes.