Abstract

Properly testing a stateful system – like a typical web api – is hard. Doing it in JavaScript is even harder, because semantics easily drown in callback hell. Most folks out there are starting to use promises to solve it, or at least imagining so. Unfortunately very few developers have understood how to leverage this wizardy correctly. So let’s find out! This talk will explore the full power of promises, in the context of TDD, and reveal a few surprises too.