Use Rack sessions and reloader instead of cookies and shotgun.

Examples/Calculator/Gemfile

@@ -3,3 +3,7 @@ gem "cukesalad", ">=0.7"
 gem "rspec", ">=2.5.0", :require => 'spec'
 gem "capybara", ">=0.4.1.2"
 gem "sinatra", ">=1.2.0"
+
+group :test, :development do
+  gem 'sinatra-reloader', '0.5.0'
+end

Examples/Calculator/Gemfile.lock

@@ -7,6 +7,7 @@ GEM
       cucumber (>= 0.10.7)
       rdiscount (>= 1.6.8)
       rspec (>= 2.6.0)
+    backports (2.3.0)
     bcat (0.6.1)
       rack (~> 1.0)
     builder (3.0.0)
@@ -36,6 +37,8 @@ GEM
     json (1.5.3)
     json_pure (1.5.3)
     mime-types (1.16)
+    monkey-lib (0.5.4)
+      backports
     nokogiri (1.5.0)
     rack (1.3.0)
     rack-test (0.6.0)
@@ -58,6 +61,16 @@ GEM
     sinatra (1.2.6)
       rack (~> 1.1)
       tilt (< 2.0, >= 1.2.2)
+    sinatra-advanced-routes (0.5.1)
+      monkey-lib (~> 0.5.0)
+      sinatra (~> 1.0)
+      sinatra-sugar (~> 0.5.0)
+    sinatra-reloader (0.5.0)
+      sinatra (~> 1.0)
+      sinatra-advanced-routes (~> 0.5.0)
+    sinatra-sugar (0.5.1)
+      monkey-lib (~> 0.5.0)
+      sinatra (~> 1.0)
     term-ansicolor (1.0.5)
     tilt (1.3.2)
     xpath (0.1.4)
@@ -71,3 +84,4 @@ DEPENDENCIES
   cukesalad (>= 0.7)
   rspec (>= 2.5.0)
   sinatra (>= 1.2.0)
+  sinatra-reloader (= 0.5.0)

Examples/Calculator/lib/web_calculator.rb

@@ -1,13 +1,19 @@
 require 'sinatra/base'
 require 'erb'
+
 $:.unshift(File.dirname(__FILE__), '.')
 require 'calculator'
 
 Sinatra::Base.enable :inline_templates
-Sinatra::Base.enable :sessions
 
 class WebCalculator < Sinatra::Base
 
+  use Rack::Session::Pool
+
+  configure :development, :test do
+      require 'sinatra/reloader'
+  end
+
   helpers do
     def operate_with
       { 'plus' => :+, 'minus' => :-}