fix typo in internal domain check for email and add tests

node_modules/c9/has-internal-domain.js

@@ -9,7 +9,7 @@ define(function(require, exports, module) {
 
     var _ = require("lodash");
 
-    var internalDomain = ['c9.io', 'clou9beta.com'];
+    var internalDomain = ['c9.io', 'cloud9beta.com'];
 
     function hasInternalDomain(email) {
         if (!email) return false;

node_modules/c9/has-internal-domain_test.js

@@ -0,0 +1,34 @@
+"use strict";
+"use mocha";
+
+require("c9/inline-mocha")(module);
+var assert = require("assert");
+var faker = require("faker");
+var hasInternalDomain= require("c9/has-internal-domain");
+
+describe("has-internal-domain", function() {
+
+    it("returns false when undefined email", function() {
+        var email;
+        
+        assert.equal(false, hasInternalDomain(email), "should return false when email undefined");
+    });
+    
+    it("returns true when email has c9.io domain", function() {
+        var email = "test@c9.io";
+        
+        assert.equal(true, hasInternalDomain(email), "should return true when email has c9.io domain");
+    });
+    
+    it("returns true when has cloud9beta.com domain", function() {
+        var email = "test@cloud9beta.com";
+        
+        assert.equal(true, hasInternalDomain(email), "should return true when email has cloud9beta.com domain");
+    });
+    
+    it("returns false when not internal email", function() {
+        var email = faker.internet.email();
+        
+        assert.equal(false, hasInternalDomain(email), "should return false when email is not internal");
+    });
+});