Simple wait_for_* helper method for Capybara tests

capybara_helpers.rb

# spec/support/capybara_helpers.rb

module CapybaraHelpers
  def wait_for_whizboo
    start = Time.now
    while true
      break if [check for whizboo here, e.g. with page.evaluate_script]
      if Time.now > start + 5.seconds
        fail "Whizboo didn't happen."
      end
      sleep 0.1
    end
  end
end

RSpec.configure do |config|
  config.include CapybaraHelpers, type: :request
end