I like Gary Bernhardt’s talks. The first time have seen something from him was a kata on katacast and I’ve been so impressed by his speed in Vim!
Here is a talk from him where he nails quite everything I could say about testing.
- difference between system / integration tests and unit tests,
- objective in ratios between both,
- why speed matters,
- decoupling business logic from framework for testability,
- when unit tests take time to initialize, it’s a need to improve the design,
