salient parts of my selenium/cuke env setup

env.rb

# Set up the Rails environment for Cucumber
ENV["RAILS_ENV"] ||= "test"
require File.expand_path(File.dirname(__FILE__) + '/../../config/environment')
require 'cucumber/rails/world'

# turn off transactions 
Cucumber::Rails::World.use_transactional_fixtures = false

# configure webrat to use selenium
Webrat.configure do |config|
  config.mode = :selenium
  config.application_environment = :test
  config.selenium_server_port = 9999
  config.application_port = 5678
  config.selenium_browser_key = "*chrome"
  config.open_error_files = false # Set to true if you want error pages to pop up in the browser
end

# Factory_girl
require Rails.root.join('test','factory')

# Databse cleaner
Before do
  puts 'truncating...'
  require 'database_cleaner'
  require 'database_cleaner/cucumber'
  DatabaseCleaner.strategy = :truncation
end

World(Webrat::Selenium::Matchers)