Iris is a front end developer with a passion for user experience, currently building products at Spotify. She's also engaged in the Swedish meetup scene where she co-organises a ReasonML meetup. She believes great products can only be created when product, design and engineering work together.
Every bug is different: Some are lurking around for months, others appear suddenly after the upgrade of a dependency. Some are introduced by us, others by other teams or systems. Some are painfully obvious and affect all users, others only occur in edge (cases). And the ways of finding, and eventually, preventing them, are just as diverse: be it snapshot, unit, integration, end to end tests or automated visual tests, every kind comes with its challenges and opportunities. Testing UIs is hard, but in the end, only test automation can give us the confidence we need to move fast and refactor our code relentlessly. In this talk we are going to look at what kinds of bugs there are, which tests are most effective for catching which, and how we can implement them using modern front end technologies.