testing node.js using mocha and promises

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I am building an API that uses CouchDB as a backend and whilst building the backend library I want to create a function in a library to add a user account and return success or failure but the callbacks are causing problems.

After reading up on JS Promises I realised that these would solve my problems but I can't get them to work despite reading lots of tutorials.

Could you take a look at my code and help me understand why it won't work?

var request = require('request');
var md5 = require('MD5');
var crypto = require('crypto');
var Q = require('q');

exports.new_account = function(params) {
    console.log("\nNEW_ACCOUNT")
    params.password = md5(params.password);
    //console.log(params);
    var token = crypto.randomBytes(16).toString('hex');
    var record = {
        type:"user", 
        status:"pending", 
        token:token, 
        credentials:params, 
        beacons_of_interest:{
            count:0, 
            beacons:[]
        }
    };
    console.log(record);

    var uri = 'http://ift.tt/1jc3RR4'+params.email;
    var deferred = Q.defer();
    request({method: 'PUT', uri:uri, body: JSON.stringify(record)}, function (error, response, body) {
        console.log('performing request')
        var top = JSON.parse(body);
        console.log(top);
        if (top.error == 'conflict') {
            console.log('the supplied email address already exists');
            deferred.reject('account exists!');
        }
        console.log('resolving request')
        deferred.resolve('account added.');
    })
    //var res = {status:"success", message:"Account created"};
    return deferred.promise;
}

Thanks,

asked 23 secs ago

user303229

66