namespace Window {
 export const get = () => window
}

const Comp = () => {
 useEffect(() => {
  // handle się nigdy nie wykona :(
  const handle = () => {}
  Window.get().addEventListener('keypress', handle)
  return () => Window.get().removeEventListener('keypress', handle)
 }, [])
}

describe('Comp', () => {
 beforeEach(() => {
  spyOn(Window, 'get').and.returnValue(document.body)
 })

 it('calls keypress', () => {
  Window.get().dispatchEvent(new KeyboardEvent('keypress'))
 })
})