Conditional spork with cucumber

env.rb

ENV["RAILS_ENV"] ||= 'test'
require 'pry'

# Conditional Spork.prefork (this comment is needed to fool Spork's `bootstrapped?` check)
if /spork/i =~ $0
  require File.expand_path("../env_spork", __FILE__)
else
  require File.expand_path("../env_base", __FILE__)
end

env_base.rb

# IMPORTANT: This file is generated by cucumber-rails - edit at your own peril.
# It is recommended to regenerate this file in the future when you upgrade to a 
# newer version of cucumber-rails. Consider adding your own code to a new file 
# instead of editing this one. Cucumber will automatically load all features/**/*.rb
# files.

require 'cucumber/rails'

# Capybara defaults to XPath selectors rather than Webrat's default of CSS3. In
# order to ease the transition to Capybara we set the default here. If you'd
# prefer to use XPath just remove this line and adjust any selectors in your
# steps to use the XPath syntax.
Capybara.default_selector = :css

# By default, any exception happening in your Rails application will bubble up
# to Cucumber so that your scenario will fail. This is a different from how 
# your application behaves in the production environment, where an error page will 
# be rendered instead.
#
# Sometimes we want to override this default behaviour and allow Rails to rescue
# exceptions and display an error page (just like when the app is running in production).
# Typical scenarios where you want to do this is when you test your error pages.
# There are two ways to allow Rails to rescue exceptions:
#
# 1) Tag your scenario (or feature) with @allow-rescue
#
# 2) Set the value below to true. Beware that doing this globally is not
# recommended as it will mask a lot of errors for you!
#
ActionController::Base.allow_rescue = false

# Remove/comment out the lines below if your app doesn't have a database.
# For some databases (like MongoDB and CouchDB) you may need to use :truncation instead.
begin
  DatabaseCleaner.strategy = :transaction
rescue NameError
  raise "You need to add database_cleaner to your Gemfile (in the :test group) if you wish to use it."
end

# You may also want to configure DatabaseCleaner to use different strategies for certain features and scenarios.
# See the DatabaseCleaner documentation for details. Example:
#
#   Before('@no-txn,@selenium,@culerity,@celerity,@javascript') do
#     # { :except => [:widgets] } may not do what you expect here
#     # as tCucumber::Rails::Database.javascript_strategy overrides
#     # this setting.
#     DatabaseCleaner.strategy = :truncation
#   end
#
#   Before('~@no-txn', '~@selenium', '~@culerity', '~@celerity', '~@javascript') do
#     DatabaseCleaner.strategy = :transaction
#   end
#

# Possible values are :truncation and :transaction
# The :transaction strategy is faster, but might give you threading problems.
# See https://github.com/cucumber/cucumber-rails/blob/master/features/choose_javascript_database_strategy.feature
Cucumber::Rails::Database.javascript_strategy = :truncation

env_spork.rb

require 'spork'

#uncomment the following line to use spork with the debugger
#require 'spork/ext/ruby-debug'

Spork.prefork do
  require File.expand_path("../../../config/environment", __FILE__)
  require 'cucumber/rails'
  require 'database_cleaner'
end

Spork.each_run do
  $cucumber_start_time = Time.now
  require File.expand_path("../env_base", __FILE__)
  require File.expand_path("../../../config/environment", __FILE__)
end