Create restful invites controller and ajaxified the workflow.

test/functional/invites_controller_test.rb

@@ -0,0 +1,20 @@
+require 'test_helper'
+
+class InvitesControllerTest < ActionController::TestCase
+  def test_new
+    get :new
+    assert_template 'new'
+  end
+  
+  def test_create_invalid
+    Invite.any_instance.stubs(:valid?).returns(false)
+    post :create
+    assert_template 'new'
+  end
+  
+  def test_create_valid
+    Invite.any_instance.stubs(:valid?).returns(true)
+    post :create
+    assert_redirected_to root_url
+  end
+end