Resolving expectations against an object of promises

return-promise-for-an-object-of-values.js

/**
 * Return a promise for an object of test values
 */
 var Q = require('q');
 
 var promise1 = getPromiseForValue('someArg1');
 var promise2 = getPromiseForValue('someArg2');
 var promise3 = getPromiseForValue('someArg3');
 
 return Q.all([
    promise1,
    promise2,
    promise3
   ])
   .then(function(arrayOfResolvedValues) {
     return {
       // Need to maintain values of the keys, brittle
       key1: arrayOfResolvedValues[1],
       key2: arrayOfResolvedValues[2],
       key3: arrayOfResolvedValues[3],
     };
   });

test-object-of-promises.js

/**
 * When you need to test assertions against an object of promised values. 
 */
 
 // Library for dealing with prommises.
 var Q = require('q');

var callback; // From step definition
var objectOfExpectedValues; // Keys in same order as returned object of promises
var objectOfPromises = getTestResults();

var keys = Object.keys(objectOfPromises); 
var arrayOfPromises = keys.map(function(key) {return objectOfPromises[key];});

function doTest(resolvedTestValue, index) {
  var currentKey = keys[index];
  expect(arrayOfExpectedValues[currentKey]).to.equal(resolvedTestValue);
}

Q.all(arrayOfPromises)
  .then(function(arrayOfResolvedValues) {
   resolvedValues.forEach(doTest);
  })
  .done(callback);