Here’s video four in our series designed to jump-start your understanding of the core principles and practices of Agile Software Engineering (ASE). In this video, Ken Pugh, one of Lean-Agile thought leaders, talks about the principle of ‘testability.’ Testability is a key quality attribute of code. We want tests that are fast, repeatable, and that can be automated. To design the right tests, we need to consider context of the system (state) and identify the.