Tomasz Kowal - Software Developer at ClubCollect Introduction to stateful property based testing Talk in three words: Stateful Property-Based Testing Abstract Property-based testing is a technique for writing tests that use a framework for creating test inputs and user-defined properties for validating outputs. Generating data allows for finding bugs that would be impossible to catch by regular unit tests: e.g. too big to encode by hand. This talk will explain why it is worth getting into PBT by introducing successful usages of PBT for testing AUTOSAR, LevelDB and Dropbox. All these examples use stateful testing, so the second half of the talk describes steps to create a stateful test for a simple key-value store. Objectives Introductory materials for PBT often focus on straightforward cases which are great for teaching but fail to show the true potential of PBT. The goal of this talk is a high-level overview that is both encouraging for beginners but also maps the road to mastering Property-Based Testing. Audience Developers who have heard about Property-Based Testing but are not convinced yet about its usefulness. The speaker Tomasz has worked with functional languages for over eight years and loves learning and teaching about concepts and techniques. Github: tomekowal Twitter: @snajper47 ElixirConf EU Website: www.elixirconf.eu Twitter: www.twitter.com/elixirconfeu Mail: info at elixirconfeu