prray/test/filterAsync.test.ts

'Promisified' Array, comes with async method supports(such as mapAsync). And it is compatible with normal array.

import test from 'ava'
import { prray } from '../src/prray'
import { PrrayPromise } from '../src/prraypromise'
import { toPrrayPromise, isEven, isEvenAsync } from './test-utils'

test('prray filterAsync', async t => {
  const p = prray([1, 2, 3, 4])

  t.true(p.filterAsync(isEvenAsync) instanceof PrrayPromise)
  t.true(p.filterAsync(isEven) instanceof PrrayPromise)

  t.deepEqual(await p.filterAsync(isEvenAsync), prray([2, 4]))
  t.deepEqual(await p.filterAsync(isEven), prray([2, 4]))
})

test('prraypromise filterAsync', async t => {
  const pp = toPrrayPromise([1, 2, 3, 4])

  t.true(pp.filterAsync(isEvenAsync) instanceof PrrayPromise)
  t.true(pp.filterAsync(isEven) instanceof PrrayPromise)

  t.deepEqual(await pp.filterAsync(isEvenAsync), prray([2, 4]))
  t.deepEqual(await pp.filterAsync(isEven), prray([2, 4]))
})