Add test hooks to check if mails are queued

src/mailer.js

@@ -20,7 +20,10 @@ exports = module.exports = {
     FEEDBACK_TYPE_FEEDBACK: 'feedback',
     FEEDBACK_TYPE_TICKET: 'ticket',
     FEEDBACK_TYPE_APP: 'app',
-    sendFeedback: sendFeedback
+    sendFeedback: sendFeedback,
+
+    _getMailQueue: _getMailQueue,
+    _clearMailQueue: _clearMailQueue
 };
 
 var assert = require('assert'),
@@ -362,3 +365,11 @@ function sendFeedback(user, type, subject, description) {
 
     enqueue(mailOptions);
 }
+
+function _getMailQueue() {
+    return gMailQueue;
+}
+
+function _clearMailQueue() {
+    gMailQueue = [];
+}