Jest, Mocha, and Ava are the popular testing frameworks for nodejs. Also, new players are joining the scene, such as node:test, test and Playwright. If we are writing tests, we probably run our testing framework tens of times daily. But do we really know what are the main differences between them?
In this talk, I will go over some of the implementation details of different frameworks to understand how they solve, or not, the same problem in different ways. We will talk about parallelism, isolation, watch mode, advanced JS support, and more.