Solution

[BadOfficer]

No description provided.

[mateacademy-ai-mentor]

Review Summary

Your test suite for restoreNames meets the task requirements and is sufficient to validate the core behavior of the function, so your solution is approved. You correctly test that restoreNames returns undefined, that it restores firstName when it is missing or explicitly undefined, and that it works for both single and multiple users based on the fullName field. To strengthen your coverage further (optional), you could add a test in src/restoreNames.test.js that verifies an existing, non-undefined firstName is not overwritten when restoreNames runs. Another useful, but non-essential, enhancement would be tests for users with missing or malformed fullName values (e.g., empty strings or unexpected formats) to clearly define the expected behavior in those edge cases. Minor polish items include tightening up some test descriptions for clarity (for example, preferring phrasing like “should return undefined”) and making semicolon usage consistent, but these are stylistic rather than functional. Overall, you demonstrated good use of Jest and clear coverage of the main requirements—nice work.

---

✨ Please rate this review in the Platform's notification center¹. I will be grateful for your feedback! ✨

Footnotes

1. Rate AI review example ↩