Sergio Sastre Flórez

Android GDE - Lead Android Developer at Deutsche Bahn

Google Developer Expert for Android with 11+ years of experience, currently consulting for Deutsche Bahn Systel. He's worked for other well-known companies such as Check24, Liferando, AutoScout24, and Hermes Germany. He is a passionate advocate for software testing and has authored numerous blog posts on the matter. He has also contributed to open-source libraries on Android UI testing like KasperskyLab/Kaspresso and authored others, like Android Screenshot Testing Playground, which won a Google Open Source Peer Bonus award in 2024. When not coding, he enjoys playing sports like football, running, rollerblading or snowboarding in the mountains. He  loves challenges and making things happen.

Let's @Preview the Future: Automating Screenshot Testing in Compose Multiplatform

Compose Multiplatform is gaining serious traction. With iOS support recently declared stable and Android Studio Narwhal introducing @Preview support for shared Composables in common, the ecosystem is evolving rapidly. While @Preview is traditionally used for visual checks during UI development, what if we could transform these @Previews into powerful automated visual tests? That's exactly what we'll explore in this talk. We'll: - Briefly introduce screenshot testing and its key benefits - Show how any Compose Multiplatform @Preview can become an automated screenshot test - Walk through the full process with live coding examples After this session, you’ll have a solid grasp of how to level up visual testing in your Compose Multiplatform projects.