Spork, RSpec, Sham and Caching Classes

Gemfile

source 'http://rubygems.org'

gem 'rails', '3.0.4'

group :test do
  gem 'database_cleaner'
  gem 'rspec-rails'
  gem 'rspec-rails-matchers'
  gem 'sham'
  gem 'spork', '=0.9.0.rc7'
end

spec_helper.rb

require 'spork'

Spork.prefork do
  ENV['RAILS_ENV'] ||= 'test'
  require File.expand_path("../../config/environment", __FILE__)
  require 'rspec/rails'
  require 'database_cleaner'

  Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}

  RSpec.configure do |config|
    config.use_transactional_fixtures = false
    config.use_instantiated_fixtures = false

    config.before(:suite) do
      DatabaseCleaner.strategy = :transaction
      DatabaseCleaner.clean_with(:truncation)
    end

    config.before(:each) do
      DatabaseCleaner.start
    end

    config.after(:each) do
      DatabaseCleaner.clean
    end
  end
end

Spork.each_run do
  ActiveSupport::Dependencies.clear
  ActiveRecord::Base.instantiate_observers
  Sham::Config.activate!
end if Spork.using_spork?

test.rb

MyApplication::Application.configure do
  config.cache_classes = !(ENV['DRB'] == 'true')
  config.whiny_nils = true
  config.consider_all_requests_local       = true
  config.action_controller.perform_caching = false
  config.action_controller.allow_forgery_protection    = false

  config.after_initialize do
    Sham::Config.activate!
  end
end