prray/test/test.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, Prray } from '../src/prray'

test('array compatibility', async t => {
  const p = prray([1, 2, 3, 4])
  t.is(Array.isArray(p), true)
  t.is(p instanceof Prray, true)
  t.is(p instanceof Array, true)
  t.is(p.length, 4)
  t.is(p[0], 1)
  t.deepEqual(await p.map(i => i + 1), prray([2, 3, 4, 5]))
  t.deepEqual([...p], [1, 2, 3, 4])
  t.deepEqual(JSON.stringify(p), JSON.stringify([1, 2, 3, 4]))

  let ix = 1
  for (const item of p) {
    t.is(item, ix++)
  }

  ix = 1
  for (const item in p) {
    t.is(p[item], ix++)
  }

  const iterator = p[Symbol.iterator]()
  t.is(iterator.next().value, 1)
  t.is(iterator.next().value, 2)
  t.is(iterator.next().value, 3)
  t.is(iterator.next().value, 4)
  t.true(iterator.next().done)
})