add cucumber for integration testing and add a feature for statistics

refactor some stuff to support testing statistisc

features/support/env.rb

@@ -0,0 +1,17 @@
+# Sets up the Rails environment for Cucumber
+ENV["RAILS_ENV"] ||= "test"
+require File.expand_path(File.dirname(__FILE__) + '/../../config/environment')
+require 'cucumber/rails/world'
+require 'cucumber/formatter/unicode' # Comment out this line if you don't want Cucumber Unicode support
+Cucumber::Rails.use_transactional_fixtures
+Cucumber::Rails.bypass_rescue # Comment out this line if you want Rails own error handling 
+                              # (e.g. rescue_action_in_public / rescue_responses / rescue_from)
+
+require 'webrat'
+
+Webrat.configure do |config|
+  config.mode = :rails
+end
+
+require 'cucumber/rails/rspec'
+require 'webrat/core/matchers'

features/support/paths.rb

@@ -0,0 +1,22 @@
+module NavigationHelpers
+  def path_to(page_name)
+    case page_name
+    
+    when /the homepage/
+      root_path
+    when /the statistics page/
+      stats_path
+    
+    # Add more page name => path mappings here
+    
+    else
+      raise "Can't find mapping from \"#{page_name}\" to a path.\n" +
+        "Now, go and add a mapping in features/support/paths.rb"
+    end
+  end
+end
+
+World do |world|
+  world.extend NavigationHelpers
+  world
+end