12345678910111213141516171819
import {prepend} from './prepend'
test('happy', () => {  expect(prepend('yes', ['foo', 'bar', 'baz'])).toEqual([    'yes',    'foo',    'bar',    'baz',  ])})
test('with empty list', () => {  expect(prepend('foo')([])).toEqual(['foo'])})
test('with string instead of array', () => {  expect(prepend('foo')('bar')).toEqual(['foo', 'b', 'a', 'r'])})