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import { composeAsync } from './composeAsync'import { delay } from './delay'import { map } from './map'import { mapFastAsync } from './mapFastAsync'
test('happy', async () => {  const fn = async x => {    await delay(100)
    return x + 10  }  const result = await mapFastAsync(fn, [ 1, 2, 3 ])  const curriedResult = await mapFastAsync(fn)([ 1, 2, 3 ])  expect(result).toEqual([ 11, 12, 13 ])  expect(curriedResult).toEqual([ 11, 12, 13 ])})
test('composeAsync', async () => {  const result = await composeAsync(    mapFastAsync(async x => {      await delay(100)
      return x + 1    }),    mapFastAsync(async x => {      await delay(100)
      return x + 10    }),    map(x => x * 10)  )([ 1, 2, 3 ])  expect(result).toEqual([ 21, 31, 41 ])})
test('error', async () => {  try {    const fn = async x => {      JSON.parse('{:')    }    const result = await mapFastAsync(fn, [ 1, 2, 3 ])  } catch (err){    expect(err.message).toBe('Unexpected token : in JSON at position 1')  }})
test('pass index as second argument', async () => {  await mapFastAsync((x, i) => {    expect(x % 10).toBe(0)    expect(typeof i).toBe('number')  },  [ 10, 20, 30 ])})