Remove hashlib dependency and switch to mocha for testing

lib/document_handler.js

@@ -86,9 +86,9 @@ DocumentHandler.prototype.handlePost = function(request, response) {
   });
 };
 
-// Get a random key that hasn't been already used
+// Keep choosing keys until one isn't taken
 DocumentHandler.prototype.chooseKey = function(callback) {
-  var key = this.keyGenerator.createKey(this.keyLength);
+  var key = this.acceptableKey();
   var _this = this;
   this.store.get(key, function(ret) {
     if (ret) {
@@ -99,4 +99,8 @@ DocumentHandler.prototype.chooseKey = function(callback) {
   }); 
 };
 
+DocumentHandler.prototype.acceptableKey = function() {
+  return this.keyGenerator.createKey(this.keyLength);
+};
+
 module.exports = DocumentHandler;

lib/file_document_store.js

@@ -1,7 +1,7 @@
 var fs = require('fs');
+var crypto = require('crypto');
 
 var winston = require('winston');
-var hashlib = require('hashlib');
 
 // For storing in files
 // options[type] = file
@@ -12,12 +12,19 @@ var FileDocumentStore = function(options) {
   this.expire = options.expire;
 };
 
+// Generate md5 of a string
+FileDocumentStore.md5 = function(str) {
+  var md5sum = crypto.createHash('md5');
+  md5sum.update(str);
+  return md5sum.digest('hex');
+};
+
 // Save data in a file, key as md5 - since we don't know what we could be passed here
 FileDocumentStore.prototype.set = function(key, data, callback, skipExpire) {
   try {
     var _this = this;
     fs.mkdir(this.basePath, '700', function() {
-      fs.writeFile(_this.basePath + '/' + hashlib.md5(key), data, 'utf8', function(err) {
+      fs.writeFile(_this.basePath + '/' + _this.md5(key), data, 'utf8', function(err) {
         if (err) {
           callback(false);
         }
@@ -37,7 +44,7 @@ FileDocumentStore.prototype.set = function(key, data, callback, skipExpire) {
 // Get data from a file from key
 FileDocumentStore.prototype.get = function(key, callback, skipExpire) {
   var _this = this;
-  fs.readFile(this.basePath + '/' + hashlib.md5(key), 'utf8', function(err, data) {
+  fs.readFile(this.basePath + '/' + _this..md5(key), 'utf8', function(err, data) {
     if (err) {
       callback(false);
     }

lib/key_generators/random.js

@@ -1,4 +1,7 @@
 var RandomKeyGenerator = function(options) {
+  if (!options) {
+    options = {};
+  }
   this.keyspace = options.keyspace || 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
 };
 

lib/redis_document_store.js

@@ -1,6 +1,5 @@
 var redis = require('redis');
 var winston = require('winston');
-var hashlib = require('hashlib');
 
 // For storing in redis
 // options[type] = redis