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' ])})