Solution

[ExtymAndriy]

No description provided.

[mateacademy-ai-mentor]

Review Summary

I am approving your work on this task because the tests you wrote for restoreNames clearly cover the required behavior. You verify that the function mutates the users array in place and does not return a value by asserting the result is undefined. You also correctly test both key scenarios: when firstName is completely missing from a user object and when firstName is present but set to undefined, ensuring in both cases it is restored from fullName. Additionally, you confirm that existing firstName values are left unchanged, which matches the requirement not to overwrite valid data. There are no critical gaps that would block the task from being completed successfully. As a minor potential enhancement (not required for approval), you could add edge-case tests for unusual fullName formats (like single-word names or extra spaces) to make the behavior more robust. Overall, your tests are clear, focused, and aligned with the specification—well done.

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