def process(action, parameters = nil, session = nil, flash = nil, http_method = 'GET')
%w(@controller @request @response).each do |iv_name|
if !(instance_variable_names.include?(iv_name) || instance_variable_names.include?(iv_name.to_sym)) || instance_variable_get(iv_name).nil?
raise "#{iv_name} is nil: make sure you set it in your test's setup method."
end
end
@request.recycle!
@response.recycle!
@html_document = nil
@request.env['REQUEST_METHOD'] = http_method
@request.action = action.to_s
parameters ||= {}
@request.assign_parameters(@controller.class.controller_path, action.to_s, parameters)
@request.session = ActionController::TestSession.new(session) unless session.nil?
@request.session["flash"] = ActionController::Flash::FlashHash.new.update(flash) if flash
build_request_uri(action, parameters)
Base.class_eval { include ProcessWithTest } unless Base < ProcessWithTest
@controller.process_with_test(@request, @response)
end