Jest run async function ONCE before all tests

Question

I want to use jest for my server unit testing (instead of mocha+chai). Is there a way I can run async function before all tests start (init purposes) only once and not for every

Answer 1

If you execute jest tests with npm you can run any node command or any executable before executing other command

"scripts": {
    "test": "node setup.js && jest"
  }

so now you can run this with command

$ npm t