laster-tool/__test__/index.spec.js

const test = require('ava')

const { sleep, sync } = require('../index')

test('sync function from native code', (t) => {
  const fixture = 42
  t.is(sync(fixture), fixture + 100)
})

test('sleep function from native code', async (t) => {
  const timeToSleep = 200
  const value = await sleep(timeToSleep)
  t.is(value, timeToSleep * 2)
})