text: import permutate from '../src/permutate'
  
  test('should return [ [ 1, 2, 3 ],[ 1, 3, 2 ],[ 2, 1, 3 ],[ 2, 3, 1 ],[ 3, 1, 2 ],[ 3, 2, 1 ] ] when value [1, 2, 3]',
      () => expect(permutate([1, 2, 3])).toEqual([[1, 2, 3], [1, 3, 2], [2, 1, 3], [2, 3, 1], [3, 1, 2], [3, 2, 1]])
  )
  