Async timeout promise

async_timeout.js

let delay = (timeout) => {
  return new Promise((resolve, reject) => {
    setTimeout(resolve, timeout);
  });
};

export default delay;

Usage.md

For use in testing instead of a setTimeout callback.

it('will be called later', async function(done) {
  let now = Date.now();
  await delay(500);
  // timing will probably be off by a few milliseconds
  expect(Date.now() - now).toBeAbout(500);
  done();
});