Q Promise Recursion - NodeJS

promise-test.js

/**
 *
 */
'use strict';
var q = require('q');
var start = 5;

//Time delayed function
function checkA() {
    console.log('Call Check A');
    var promise = q.defer();
    setTimeout(function () {
        console.log('Resolve Check A');
        promise.resolve('passCheckA');
    }, 500);
    return promise.promise;
}
//Recurse function
function recurse(iter, results) {
    console.log('Recurse Round %s', iter);
    var promise = q.defer();

    checkA().then(function () {
        setTimeout(function () {
            if (iter === 2 && false) { //Enable to see error
                console.log('Recurse Failure');
                promise.reject('Recurse Failed');
            } else if (iter > 0) {
                results.push('Round ' + iter);
                console.log('Recurse Deeper', results);
                recurse(iter - 1, results).then(function(){
                    promise.resolve(results);
                });
            } else {
                results.push('Final Round ' + iter);
                console.log('******Exit Recursion');
                promise.resolve(results);
            }
        }, 50);
    }, function () {
        promise.reject();
    });
    return promise.promise;
}
//Kick off demo
recurse(start, []).then(function (results) {
    console.log('Results:', results);
}).catch(function (err) {
    console.log('Catch Error:', err);
});