Code Craft: Aggregate Data from Multiple Mock APIs with Retries and Tests

Code Craft: Aggregate Data from Multiple Mock APIs (Failures/Retries) and Write Tests Implement a data aggregation function/service that calls multiple mock APIs, aggregates their responses, and returns a single nested result object. Requirements Aggregate across multiple APIs: Call at least 2+ APIs (e.g., fetch FoodItem metadata, related posts, ratings/likes). Merge responses into one nested result object. Failure handling: When any API call fails, implement a clear strategy: fail-fast with an error, or return a partial response with error markers, or retry and then decide. Retry mechanism (optional but recommended): Retry failed API calls up to k times. Avoid infinite retries; distinguish “fails once then succeeds” vs “fails repeatedly then fails”. Testing: Write unit/integration tests covering: all APIs succeed; one API fails once then succeeds after retry; one API fails multiple times and ultimately fails (or returns a degraded result). Tests must strictly validate the nested result object (deep/field-by-field comparison). I/O Input: a resource id (e.g., food_item_id). Output: an aggregated nested object (e.g., JSON/dict). Language/framework is not constrained. Focus on engineering: error handling, testability, and clean boundaries.