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x/rambda/mapAsyncLimit.spec.js

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import isCI from 'is-ci'
import { composeAsync } from './composeAsync'import { delay } from './delay'import { mapAsync } from './mapAsync'import { mapAsyncLimit } from './mapAsyncLimit'import { toDecimal } from './toDecimal'
jest.setTimeout(30000)
test('happy', async () => { const limit = 3 const startTime = new Date().getTime() const list = [ 1, 2, 3, 4, 5, 6, 7, 8, 9 ] const iterable = async x => { await delay(500)
return x + 1 } const result = await mapAsyncLimit( iterable, limit, list ) const endTime = new Date().getTime() const diffTime = endTime - startTime
const startTime2 = new Date().getTime() await mapAsync(iterable, list) const endTime2 = new Date().getTime() const diffTime2 = endTime2 - startTime2
const methodScale = toDecimal((diffTime2 - diffTime) / 1000, 0) expect(result).toEqual([ 2, 3, 4, 5, 6, 7, 8, 9, 10 ]) if (!isCI) expect(methodScale).toBe(limit)})
const fn = async x => { await delay(100)
return x + 1}
test('with R.composeAsync', async () => { const result = await composeAsync(mapAsyncLimit(fn, 2), x => x.map(xx => xx + 1))([ 1, 2, 3, 4, 5, 6 ]) expect(result).toEqual([ 3, 4, 5, 6, 7, 8 ])})
test('fallback to R.mapFastAsync', async () => { const result = await mapAsyncLimit( fn, 4, [ 1, 2, 3 ] ) expect(result).toEqual([ 2, 3, 4 ])})