module RSpec::Rails
  # Lets you call #render_cell in Rspec2. Move your cell specs to <tt>spec/cells/</tt>.
  module CellExampleGroup
    extend ActiveSupport::Concern
    extend RSpec::Rails::ModuleInclusion

    include RSpec::Rails::RailsExampleGroup
    include Cell::TestCase::TestMethods
    include ActionController::UrlFor

    if defined?(Webrat)
      include Webrat::Matchers
      include Webrat::Methods
    end

    if defined?(Capybara)
      begin
        include Capybara::DSL
      rescue NameError
        include Capybara
      end

      # Overwrite to wrap render_cell into a Capybara custom string with a
      # lot of matchers.
      #
      # Read more at:
      #
      # The Capybara.string method documentation:
      #   - http://rubydoc.info/github/jnicklas/capybara/master/Capybara#string-class_method
      #
      # Return value is an instance of Capybara::Node::Simple
      #   - http://rubydoc.info/github/jnicklas/capybara/master/Capybara/Node/Simple
      #
      # That expose all the methods from the following capybara modules:
      #   - http://rubydoc.info/github/jnicklas/capybara/master/Capybara/Node/Matchers
      #   - http://rubydoc.info/github/jnicklas/capybara/master/Capybara/Node/Finders
      def render_cell(*args)
        Capybara.string super
      end
    end

    module InstanceMethods
      attr_reader :controller, :routes

      def method_missing(method, *args, &block)
        # Send the route helpers to the application router.
        if @routes && @routes.named_routes.helpers.include?(method)
          @controller.send(method, *args, &block)
        else
          super
        end
      end
    end

    included do
      metadata[:type] = :cell
      before do # called before every it.
        @routes = ::Rails.application.routes
        ActionController::Base.allow_forgery_protection = false
        setup # defined in Cell::TestCase.
      end

      # we always render views in rspec-cells, so turn it on.
      subject { controller }
    end

    RSpec.configure do |c|
      c.include self, :example_group => { :file_path => /spec\/cells/ }
    end

  end
end