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import {composeAsync} from './composeAsync'import {delay} from './delay'
async function identity(x) {  await delay(100)
  return x}
test('happy', async () => {  const fn1 = async x => {    await delay(100)
    return x.map(xx => xx + 1)  }  const fn2 = async x => {    await delay(100)
    return x.map(xx => xx * 2)  }  const result = await composeAsync(    fn1,    fn2  )(await Promise.all([identity(1), identity(2), identity(3)]))
  expect(result).toEqual([3, 5, 7])})
const delayFn = ms =>  new Promise(resolve => {    resolve(ms + 1)  })
test('with function returning promise', async () => {  const result = await composeAsync(    x => x,    x => x + 1,    delayFn,    x => x  )(1)
  expect(result).toEqual(3)})
test('throw error', async () => {  const fn = async () => {    await delay(1)    JSON.parse('{foo')  }
  let didThrow = false  try {    await composeAsync(fn, x => x + 1)(20)  } catch (e) {    didThrow = true  }
  expect(didThrow).toBeTrue()})