So you've got an app in the play store! Congratulations! How do you keep updating your app to add new features, account for platform updates and respond to your users? If you've ever been part of a development team that said "we have to re-write that to add any more features", this talk is for you. We will dive into strategies to architect your application for testability and techniques for testing your app. We'll discuss the uses of jUnit tests, UI tests, BDD, cucumber, espresso and mocking. Food and drink will be provided by our generous sponsor, eBay.