How to Build a 274-Test HL7-to-FHIR Pipeline Without a Live Hospital System

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A developer has published an open-source Maternity HL7-to-FHIR Pipeline that converts legacy HL7 v2.5 messages into FHIR R4 resources using Australian and European profiles. The pipeline uses Mirth Connect for ingestion, FastAPI for transformation, and HAPI FHIR Server for persistence. To avoid the complexity of running live hospital infrastructure in CI, the developer separated testing concerns by mocking the HTTP boundary to HAPI using the respx library. The resulting test suite comprises 222 unit tests, 31 integration tests, and 21 end-to-end tests, achieving 90% code coverage across 274 total tests. This approach eliminates reliance on container startup timing and live network behavior, making the pipeline faster and more reliable to test.

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ProgrammingDEV Community ·

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