const async_hooks = require('async_hooks');

function init(id, type, triggerId, handle) {
    process._rawDebug(`id: ${id}, type: ${type}, triggerId: ${triggerId}, 
                                        handle.promise: ${handle.promise}, 
                                        handle.parentid: ${handle.parentId}`);
}


function before(id) { 
    process._rawDebug('before', id, async_hooks.executionAsyncId());
 }
function after(id) { 
    process._rawDebug('after', id, async_hooks.executionAsyncId());
 }
function destroy(id) {
    process._rawDebug('destroy', id);
}

async_hooks.createHook({init, before, after, destroy}).enable();
debugger;

const parent_promise = new Promise((resolve, reject) => {resolve(5);}); 
const promise = parent_promise.then((val) => {return val;});