fix tests

node_modules/c9/blacklist.js

@@ -4,6 +4,8 @@ var _ = require("lodash");
 var internalDomain = ['c9.io', 'clou9beta.com'];
 
 function hasInternalDomain(email) {
+    if (!email) return false;
+    
     var emailElements = email.split("@");
     var emailDomain = emailElements[emailElements.length - 1];