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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]  )})