This gist simulates the execution of two async methods using async/await. It returns a message of success when both complete. A random timeout between 1 and 3000ms is being used.

asyncAwaitTest.js

function randomTimeout() {
  const t = Math.floor(Math.random() * 3000 + 1);
  return t;
}

// SetTimeout does not return a promise, so we can't await for it. This funcion promisify it mannualy.
function timeout(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

async function method1() {
  t = randomTimeout();
  await timeout(t);
  console.log("method1");
}

async function method2() {
  t = randomTimeout();
  await timeout(t);
  console.log("method2");
}

Promise.all([method1(), method2()]).then(() => console.log("Success"));