Jest Is there a test runner shown with a camera, time machine, and a lot of energy at the Javascript party? Born to react to the components of the dispute in Facebook, then it has become a framework for Front and Davis who likes their tests, sharply, opinions, and a little magical.
What is it? The fun is a Javascript testing framework that handles the unit, integration and snapshot testing. It bundles a claim library, humorous and spies, so you don’t need to tap five tools together.
Is it still relevant? Absolutely Jest React dominates the ecosystem and is one of the most download test framework on NPM. It’s not just “still relevant” – this is a child who raises his hand for every question sitting in front of the class.
Profession and agree?
Profession: Fast, batteries add, easy setup, strong snap shot testing, strong error messages, and wide environmental systems.
Cons: Heavy, snapshots for small non -reacting projects can encourage slow tests if you are subjected to abuse, and performance decreases when your sweet “thousands of tests” increase.
Strength and weakness? The power of the joke is its simplicity – you can test in seconds without wiring extra libraries. His weakness? Debaging on 2AM is different in the strange snapshot …