'use strict';

const getNumbers = () => ({

numbers: [1, 2, 3],

then(onFulfilled, onRejected) {

const num = this.numbers.shift();

if (num) {

onFulfilled(num);

} else {

onRejected(new Error('I have no numbers for you'));

}

},

});

// Usage

(async () => {

const next = getNumbers();

for (let i = 0; i < 5; i++) {

try {

const res = await next;

console.dir({ res });

} catch (err) {

console.dir({ err: err.message });

}

}

})();