This article details how to build a contract test suite for an LLM gateway, focusing on testing the gateway's code rather than the underlying LLM provider. It emphasizes the importance of testing the gateway's ability to maintain API contracts, handle upstream errors, and preserve unknown fields in responses. The author recommends using tools like Mock Service Worker with Node.js and TypeScript to create a fake provider for deterministic and fast testing, ensuring the gateway functions correctly without direct reliance on the LLM. AI
IMPACT Provides a method for ensuring the reliability of LLM integrations by testing the gateway layer.
RANK_REASON Article describes a method for testing software infrastructure (LLM gateways) using specific tools.
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