In my tests I need to do some setup before things can be tested. This setup can be kind of slow.

Right now I'm doing the setup every test:

describe("mission", () => {
  it("getAvailableMission", () => {
    generateFiles()
    // do the test
  })
})

How can I share the results of generateFiles between multiple files?

It's kinda similar to this question: How to share a mock between test files using karma? but I am NOT using angular.