http://stackoverflow.com/questions/10854564/database-timeout-when-running-rspec-capybara-with-javascript-driver

spec_helper.rb

require 'spork'
require 'database_cleaner'

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

def configure_rspec
  RSpec.configure do |config|
    config.mock_with :rspec

    config.use_transactional_fixtures = true

    config.infer_base_class_for_anonymous_controllers = false

    config.before(:suite) do
      # WARNING: If you modify these table during tests, you'll have to
      # clean them up yourself!
      protected_tables = %w()

      DatabaseCleaner.clean_with :truncation, except: protected_tables
    end

    config.before(:each) do
      if Capybara.current_driver == :rack_test
        DatabaseCleaner.strategy = :transaction
      else
        DatabaseCleaner.strategy = :truncation
      end

      DatabaseCleaner.start
    end

    config.after(:each) { DatabaseCleaner.clean }

    config.with_options(type: :controller) do |config|
      config.include Devise::TestHelpers
      config.extend AuthenticationMacrosForController
    end

    config.extend AcceptanceMacros, type: :acceptance

    config.include FactoryGirl::Syntax::Methods
    config.include AuthenticationMacrosForRequest
    config.include MailerMacros
    config.include Warden::Test::Helpers

    config.before(:each) { reset_email }

    FactoryGirl.reload
  end
end

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

  # TODO: refactor, put somewhere else!
  Dir[Rails.root.join("spec/example_groups/**/*.rb")].each do |f|
    require f

    full_name = f.to_s
      .sub("#{Rails.root}/spec/example_groups", '')
      .sub(/\.rb$/, '')

    group = full_name
      .camelize
      .constantize

    name = full_name.sub('_example_group', '')

    RSpec.configure do |config|
      config.include group, example_group: { file_path: %r(spec#{name}) }
    end
  end

  module Matchers
    Dir[Rails.root.join("spec/matchers/**/*.rb")].each do |f|
      require f

      matcher = f.to_s
        .sub("#{Rails.root}/spec/", '')
        .sub(/\.rb$/, '')
        .camelize
        .constantize

      RSpec::Matchers.send(:include, matcher)
    end
  end

  require 'capybara/rspec'

  Capybara.javascript_driver = :webkit
end

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

  configure_rspec
end