Are tests inside one file run in parallel in Jest?

Question

Jest states in docs: \"Jest virtualizes JavaScript environments and runs tests in parallel across worker processes.\"

But what about multiple tests inside one file, do t

Answer 1

You can use test.concurrent('test run concurrently', () => { ... }) if you want to run them in parallel inside one file is too slow. It is a bit buggy and not well documented, but at least there's a way there.

One thing I notice is it does not wait for async stuff in the beforeAll() so you need some of your own trick(like setInterval to wait) to make it work as expected.