like `Promise.all` but for plain non-iterable objects

objectPromiseAll.js

// Based on inspiration from some conversation in WeAllJS
// See wealljs.org for more info on the community!

// This is assuming a plain JS object which is why it's not using for-of, since
// plain objects aren't iterable
function objectPromiseAll(baseObject) {
  return Promise.all(Object.values(baseObject)).then((resolvedValues) => {
    const resolvedObject = {};

    Object.keys(baseObject).forEach((key, index) => {
      resolvedObject[key] = resolvedValues[index];
    });

    return resolvedObject;
  });
}

// Using sample Promises from
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/all
// for a quick bit of testing
const promise1 = Promise.resolve(3);
const promise2 = 42;
const promise3 = new Promise(function(resolve, reject) {
  setTimeout(resolve, 100, 'foo');
});

objectPromiseAll({ promise1, promise2, promise3 }).then((valuesObject) => {
  console.log(valuesObject);
  console.assert(valuesObject.promise1 === 3, 'Expected first value to be 3');
  console.assert(valuesObject.promise2 === 42, 'Expected second value to be 42');
  console.assert(valuesObject.promise3 === 'foo', 'Expected third value to be "foo"');
});