/* * * * * * * * * * * * * * * * * * *
  UTILITIES
*/

function resolveAfter2Seconds() {
	return new Promise(resolve => {
			setTimeout(() => {
					resolve(spent_time(ori_date) + 'lente');
					}, 2000);
			});
}
function resolveAfter1Seconds() {
	return new Promise(resolve => {
			setTimeout(() => {
					resolve(spent_time(ori_date) + 'rapide');
					}, 1000);
			});
}
function print_time(my_date = new Date) {
	let my_time = my_date.getSeconds();
	my_time    += ":";
	my_time    += my_date.getMilliseconds();
	return '[' + my_time + '] ';
}
function spent_time(ori_date) {
	let my_date = new Date();

	let my_seconds = my_date.getSeconds() - ori_date.getSeconds();
	if (my_seconds < 0 ) my_seconds += 60;

	let my_millis = my_date.getMilliseconds() - ori_date.getMilliseconds();
	if (my_millis < 0 ) my_millis += 1000;

	return '[' + my_seconds + ':' + my_millis + '] ';
}










/* * * * * * * * * * * * * * * * * * *
  TESTS 
/*

	 async function asyncCall() {
	 console.log(spent_time(ori_date) + 'calling');
	 const lente = await resolveAfter2Seconds();
	 const rpide = await resolveAfter1Seconds();
	 console.log(spent_time(ori_date) + lente);
	 console.log(spent_time(ori_date) + rpide);
	 }
// "[0:1] calling"
// "[0:4] after"
// "[3:6] [2:4] lente"
// "[3:15] [3:6] rapide"
 */

/*
	 function asyncCall() {
	 console.log(spent_time(ori_date) + 'calling');
	 const lente = resolveAfter2Seconds();
	 const rpide = resolveAfter1Seconds();
	 console.log(spent_time(ori_date) + lente);
	 console.log(spent_time(ori_date) + rpide);
	 }
// "[0:1] calling"
// "[0:4] [object Promise]"
// "[0:12] [object Promise]"
// "[0:19] after"
 */

/*
	 function asyncCall() {
	 console.log(spent_time(ori_date) + 'calling');
	 resolveAfter2Seconds().then(message => console.log(spent_time(ori_date) + message))
	 .then(() => resolveAfter1Seconds()).then(message => console.log(spent_time(ori_date) + message));
	 }
// "[0:1] calling"
// "[0:4] after"
// "[2:4] [2:4] lente"
// "[3:15] [3:15] rapide"
 */

/*
	 async function asyncCall() {
	 console.log(spent_time(ori_date) + 'calling');
	 const lente = await resolveAfter2Seconds();
	 console.log(spent_time(ori_date) + 'middle');
	 const rpide = await resolveAfter1Seconds();
	 console.log(spent_time(ori_date) + lente);
	 console.log(spent_time(ori_date) + rpide);
	 }
// "[0:1] calling"
// "[0:2] after"
// "[2:4] middle"
// "[3:7] [2:4] lente"
// "[3:8] [3:6] rapide"
 */

async function asyncCall() {
	console.log(spent_time(ori_date) + 'calling');
	const lente = resolveAfter2Seconds();
	const rpide = resolveAfter1Seconds();
	console.log(spent_time(ori_date) + await lente);
	console.log(spent_time(ori_date) + await rpide);
}
// "[0:0] calling"
// "[0:3] after"
// "[0:3] [2:4] lente"
// "[2:5] [1:3] rapide"






/* * * * * * * * * * * * * * * * * * *
  LAUNCH TEST
*/

let ori_date = new Date();
asyncCall();

console.log(spent_time(ori_date) + "after");