Solution

[alyonashunevych]

No description provided.

[mateacademy-ai-mentor]

Review Summary

Your test file for the restoreNames function is well-structured and correctly implements all required test cases. The tests properly cover both scenarios specified in the task: users with missing firstName property and users with firstName set to undefined. The implementation uses appropriate Jest matchers and follows testing conventions correctly.

The identified issues (like missing tests for multiple users in a single array or mixed scenarios) are nice-to-have improvements, not blockers. The core requirements from the checklist are satisfied, and your implementation correctly validates that the function extracts the first name from fullName and modifies the array in place.

Keep up the good work! Consider adding edge case tests in future projects to make your test suites more robust—such as testing arrays with multiple users or handling fullNames without spaces.

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