tests: missing tests on websocket

[andreabadesso]

Motivation

Changes were made to the websocket utils without adding new tests, causing the coverage to drop below the minimum percentage, this PR should introduce new tests to the changed method

Acceptance Criteria

• We should test the sendMessageToClient util

Checklist

• If you are requesting a merge into master, confirm this code is production-ready and can be included in future releases as soon as it gets merged
• Make sure either the unit tests and/or the QA tests are capable of testing the new features
• Make sure you do not include new dependencies in the project unless strictly necessary and do not include dev-dependencies as production ones. More dependencies increase the possibility of one of them being hijacked and affecting us.

[tuliomir]

By looking into the PR's checks action runs I could validate the coverage percentage, however I had no way to check how it was before this PR ( other than also checking the last commit's action runs ).

Would it be possible to add CodeCov to this monorepo? I've seen that they already have a flags feature to help with that. It would also add automatic annotations to the PR to help identify untested code.