Solution

[IraPolchanin]

No description provided.

[mateacademy-ai-mentor]

Review Summary

Your test file correctly implements all required test cases for the restoreNames function. The tests thoroughly cover function declaration verification, no return value validation, restoration of missing firstName fields, restoration of undefined values, and preservation of existing values—all using the Jest framework as required. The only noted limitation (missing implementation file restoreNames.js) is not a blocker since your task was to write the tests, not the implementation. The minor indentation inconsistency in the test object (extra spaces on lines 12-13) is cosmetic and does not affect functionality. CHECKLIST ITEM #1: Tests for restoreNames function — covered CHECKLIST ITEM #2: Set firstName for missing fields — covered CHECKLIST ITEM #3: Set firstName for undefined values — covered CHECKLIST ITEM #4: Preserve existing firstName values — covered CHECKLIST ITEM #5: No return value — covered CHECKLIST ITEM #6: Use Jest framework — covered Your test suite is complete and well-structured. Great work!

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