How do you test your data projects? Do you even test? Let's face the truth that data processing solutions are very rarely tested ... So let's start with fundamentals of (not only data warehouse) testing, why you should have sleepless nights (today) and how to avoid them (in the future). Joyful Craftsmen: Jaroslav Reken will bring a piece of theory, but mainly practical examples, from real life ... mainly to get you out of your comfort zone!