teamcapybara--capybara/lib/capybara/rspec.rb

require 'capybara'
require 'capybara/dsl'

RSpec.configure do |config|
  config.include Capybara, :type => :acceptance
  config.after do
    if example.metadata[:type] == :acceptance
      Capybara.reset_sessions!
      Capybara.use_default_driver
    end
  end
  config.before do
    if example.metadata[:type] == :acceptance
      Capybara.current_driver = Capybara.javascript_driver if example.metadata[:js]
      Capybara.current_driver = example.metadata[:driver] if example.metadata[:driver]
    end
  end
end

module Capybara
  module RSpec
    module StringMatchers
      extend ::RSpec::Matchers::DSL

      %w[css xpath selector].each do |type|
        matcher "have_#{type}" do |*args|
          match_for_should do |string|
            Capybara::string(string).send("has_#{type}?", *args)
          end

          match_for_should_not do |string|
            Capybara::string(string).send("has_no_#{type}?", *args)
          end

          failure_message_for_should do |string|
            "expected #{type} #{formatted(args)} to return something from:\n#{string}"
          end

          failure_message_for_should_not do |string|
            "expected #{type} #{formatted(args)} not to return anything from:\n#{string}"
          end

          def formatted(args)
            args.length == 1 ? args.first.inspect : args.inspect
          end
        end
      end

    end
  end
end