Make the Sinatra app directory aware.

test/test_app_helpers.rb

@@ -0,0 +1,13 @@
+# ~*~ encoding: utf-8 ~*~
+require File.expand_path(File.join(File.dirname(__FILE__), "helper"))
+
+context "Precious::Helpers" do
+  include Precious::Helpers
+
+  test "extracting paths from URLs" do
+    assert_nil extract_path('Eye-Of-Sauron')
+    assert_equal 'Mordor', extract_path('Mordor/Sauron')
+    assert_equal 'Mordor/Sauron', extract_path('Mordor/Sauron/Evil')
+  end
+end
+