test-engineering

Mock LLM and database dependencies in LangGraph agent tests to isolate logic and ensure determinism. Follow strict mock boundary rules to determine exactly what and when to mock, preventing external API calls from breaking graph-api test reliability.

Run LangGraph agent end-to-end tests using langgraph-sdk by applying graph-api testing patterns. These patterns validate the entire agent flow, ensuring integration DB testing patterns maintain data isolation and deterministic outcomes across the graph architecture.

Unit tests validate isolated logic, integration tests check database boundaries, and graph-api tests execute end-to-end agent flows. Understanding these test tiers ensures you apply the correct mocking strategies and validation commands for robust FitPal test coverage.

Yes, you can test new nodes without database calls by writing unit tests that mock dependencies. Focus testing philosophy on logic over dependencies, applying strict mock boundary rules to isolate the node and ensure deterministic, fast test execution.

Integration tests fail data isolation when integration DB testing patterns are not followed correctly. Apply the provided database mocking rules and structural conventions to enforce deterministic testing and prevent test data from leaking between runs.