1234567891011121314151617
import {intersperse} from './intersperse'
test('intersperse', () => {  const list = [{id: 1}, {id: 2}, {id: 10}, {id: 'a'}]  expect(intersperse('!', list)).toEqual([    {id: 1},    '!',    {id: 2},    '!',    {id: 10},    '!',    {id: 'a'},  ])
  expect(intersperse('!')([])).toEqual([])})