test.js

const { readFile, readFileSync } = require('fs');
const { resolve } = require('path');

/*
Promise.resolve().then(() => console.log('promise1 resolved'));
Promise.resolve().then(() => console.log('promise2 resolved'));
Promise.resolve().then(() => {
    console.log('promise3 resolved');
    process.nextTick(() => console.log('next tick inside promise resolve handler'));
});
Promise.resolve().then(() => console.log('promise4 resolved'));
Promise.resolve().then(() => console.log('promise5 resolved'));
setImmediate(() => console.log('set immediate1'));
setImmediate(() => console.log('set immediate2'));

process.nextTick(() => console.log('next tick1'));
process.nextTick(() => console.log('next tick2'));
process.nextTick(() => console.log('next tick3'));

setTimeout(() => console.log('set timeout'), 0);
setImmediate(() => console.log('set immediate3'));
setImmediate(() => console.log('set immediate4'));
*/

/*
const fs = require('fs');

function someAsyncOperation(callback) {
  // Assume this takes 95ms to complete
  fs.readFile('/path/to/file', callback);
}

const timeoutScheduled = Date.now();

setTimeout(() => {
  const delay = Date.now() - timeoutScheduled;

  console.log(`${delay}ms have passed since I was scheduled`);
}, 100);


// do someAsyncOperation which takes 95 ms to complete
someAsyncOperation(() => {
  const startCallback = Date.now();
  
  // do something that will take 10ms...
  while (Date.now() - startCallback < 10) {
    console.log('while');
    // do nothing
  }
});

console.log('satrt');
*/


const p = Promise.resolve();

(async () => {
  await p;
  console.log('await');
})();

p.then(() => {
  console.log('a');
}).then(() => {
  console.log('b');
});