prray/test/findIndex.test.ts

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

import test from 'ava'
import { toPrrayPromise } from './test-utils'

const pp = toPrrayPromise([1, 2, 3, 4])

test('prraypromise findIndex', async t => {
  t.is(await pp.findIndex(x => x === 2), 1)
  t.is(await pp.findIndex(x => x === 10), -1)
})