API Testing
Manual API tests cover the happy path and a handful of error cases you thought to write down. Property-based testing covers the space you didn't think about — and that's exactly where real bugs live. Schemathesis is a Python-based tool that reads your OpenAPI (or
API Testing
Frontend team waiting on backend APIs to be built. Backend team waiting on the frontend to tell them if the API shape is right. Everyone blocked on everyone else. Prism breaks this cycle. Give it an OpenAPI spec and it spins up a fully functional mock server — returns realistic example
Contract Testing
Pact and OpenAPI both prevent API integration failures, but they solve different parts of the problem. OpenAPI defines the contract — the shape of requests and responses. Pact verifies that specific consumer interactions are honored by the provider. Used together, they cover each other's blind spots. This guide shows
API Testing
REST APIs have OpenAPI. Event-driven systems — Kafka topics, RabbitMQ queues, WebSocket channels — have AsyncAPI.
API Testing
Frontend development has a classic blocking problem: the backend isn't ready. You're building a checkout flow, but the payments API returns a 500.
API Testing
You can't write a test for every possible input. A string field accepts billions of values. A numeric parameter has edge cases you haven't considered.
API Testing
Writing API tests by hand means writing a lot of boilerplate: constructing URLs, setting headers, serializing request bodies, parsing responses.
API Testing
Both Dredd and Schemathesis test whether your API implementation matches its spec.
API Testing
API contracts are promises. Your OpenAPI specification says "this endpoint returns a userId field of type string." Every consumer of your API — mobile apps, partner integrations, frontend teams — builds against that promise. When the promise breaks silently, you get production incidents, not compiler errors. Spectral is a linter
API Testing
Most teams write code first, then document it. The API exists; you write the OpenAPI spec to describe what you built.