My learning journey
01 Aug 2026
Ref: https://www.ministryoftesting.com/courses/modern-integration-testing-tools-techniques-and-strategies-for-continuous-quality/consumer-driven-contract-testing
Summary
Summary
- Project: Consumer/provider Pact contract for the GOV.UK VAT API. Important files: consumer.spec.js, provider.verify.js, and PACT_README.md.
- Outcome: Built consumer interactions and a verifier; learned practical pitfalls running Pact locally (permissions, port binding, large local caches).
What I've Learned
- Consumer-driven contracts: Write what the consumer expects (requests + example responses) and save it as a pact file — this documents real expectations and drives provider correctness.
- Two-phase workflow: Consumer test → produce pact JSON; Provider verification → run pact against provider (live service) to ensure responses match.
- Trust but verify: Pact lets consumers control the contract; provider verification prevents regressions and ensures real deployments satisfy consumers.
- Repeatability: Contracts make integration tests deterministic — no flaky network calls or external dependencies during consumer tests.
- Documentation value: Pact files are living API docs that help teams align on request/response shapes.
Shilpa Saraf
Test Engineer
She
A senior Quality Assurance Leader and Engineer with more than 20 years of experience delivering high‑quality, scalable digital products across the public sector and large enterprise environments. Consistent ability to design, implement, and embed robust test strategies for complex, distributed systems spanning APIs, backend services, and modern user interfaces.
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Rosie Sherry
Very cool to see this learning log!
Simon Tomes
Nice one, Shilpa. Great to see this. Thanks for sharing.
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