Added simple test to validate XML output.

spec/chef-rundeck_spec.rb

@@ -1,14 +1,20 @@
 require 'spec_helper'
+require 'nokogiri'
 
 describe 'ChefRundeck' do
-  it 'should return false' do
+  before do
+    # setup for the following tests
     ChefRundeck.config_file = "#{ENV['TRAVIS_BUILD_DIR']}/spec/support/client.rb"
     ChefRundeck.username = ENV['USER']
     ChefRundeck.web_ui_url = 'https://manage.opscode.com'
     ChefRundeck.configure
-
+  end
+  it 'fetch to root should return 200' do
     get '/' 
     last_response.should be_ok
   end
-
+  it 'fetched document should be Nokogiri-parseable XML document' do
+    get '/'
+    Nokogiri::XML(last_response.body).document.should be_true
+  end
 end