process

# File actionpack/lib/action_dispatch/testing/integration.rb, line 246
        def process(method, path, parameters = nil, rack_environment = nil)
          if path =~ %{://}
            location = URI.parse(path)
            https! URI::HTTPS === location if location.scheme
            host! location.host if location.host
            path = location.query ? "#{location.path}?#{location.query}" : location.path
          end

          unless ActionController::Base < ActionController::Testing
            ActionController::Base.class_eval do
              include ActionController::Testing
            end
          end

          hostname, port = host.split(':')

          env = {
            :method => method,
            :params => parameters,

            "SERVER_NAME"     => hostname,
            "SERVER_PORT"     => port || (https? ? "443" : "80"),
            "HTTPS"           => https? ? "on" : "off",
            "rack.url_scheme" => https? ? "https" : "http",

            "REQUEST_URI"    => path,
            "HTTP_HOST"      => host,
            "REMOTE_ADDR"    => remote_addr,
            "CONTENT_TYPE"   => "application/x-www-form-urlencoded",
            "HTTP_ACCEPT"    => accept
          }

          session = Rack::Test::Session.new(_mock_session)

          (rack_environment || {}).each do |key, value|
            env[key] = value
          end

          # NOTE: rack-test v0.5 doesn't build a default uri correctly
          # Make sure requested path is always a full uri
          uri = URI.parse('/')
          uri.scheme ||= env['rack.url_scheme']
          uri.host   ||= env['SERVER_NAME']
          uri.port   ||= env['SERVER_PORT'].try(:to_i)
          uri += path

          session.request(uri.to_s, env)

          @request_count += 1
          @request  = ActionDispatch::Request.new(session.last_request.env)
          response = _mock_session.last_response
          @response = ActionDispatch::TestResponse.new(response.status, response.headers, response.body)
          @html_document = nil

          @controller = session.last_request.env['action_controller.instance']

          return response.status
        end