'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'));

}

return this; // chain thenable

},

});

// Usage

const onSuccess = (res) => console.dir({ res });

const onError = (err) => console.dir({ err: err.message });

getNumbers()

.then(onSuccess, onError)

.then(onSuccess, onError)

.then(onSuccess, onError)

.then(onSuccess, onError)

.then(onSuccess, onError);