test-hook.js

import React from 'react'
import {render, flushEffects} from 'react-testing-library'

export const testHook = hook => (...args) => {
  let data = null
  const Component = () => {
    data = hook(...args)
    return null
  }
  render(<Component />)

  return () => {
    flushEffects()
    return data
  }
}