Conditionally swapping to Selenium for tests with touchy javascript issues.

capybara.rb

# spec/support/capybara.rb

require 'capybara/poltergeist'

Capybara.asset_host = 'http://localhost:3000'
Capybara.javascript_driver = :poltergeist

RSpec.configure do |config|
  config.before(:each, touchy_js: true) do
    Capybara.current_driver = :selenium
  end
  config.after(:each, touchy_js: true) do
    Capybara.use_default_driver
  end
end