Devoxx: Practical API Testing with OpenAPI and Citrus Framework by Timon Borter

Here’s a quick rundown of what you’ll get from Timon Borter’s 30-minute tooling session: learn how to spin up Citrus test clients straight from your OpenAPI spec, whip up realistic, randomized simulations of third-party services, and have both sides automatically validate against your schema. It’s black-box testing meets service virtualization in one neat package.

This workflow not only catches errors early—way before integration hell—but also lays the groundwork for contract testing (think Pact). Bonus brag: PostFinance, one of Switzerland’s top banks, leans on Citrus + OpenAPI every single day to keep their CI running smoothly.

Watch on YouTube