Allow test rescanning of different apps

test/test.rb

@@ -111,13 +111,13 @@ module BrakemanTester::RescanTestHelper
   #given in `changed`.
   #
   #Provide an array of changed files for rescanning.
-  def before_rescan_of changed
+  def before_rescan_of changed, app = "rails3.2"
     changed = [changed] unless changed.is_a? Array
 
     Dir.mktmpdir do |dir|
       @dir = dir
 
-      FileUtils.cp_r "#{TEST_PATH}/apps/rails3.2/.", dir
+      FileUtils.cp_r "#{TEST_PATH}/apps/#{app}/.", dir
       @original = Brakeman.run :app_path => dir, :debug => false
 
       yield dir if block_given?