.from.should == 'mapperproxy'       end              @instance.request('/welcome/aboard', 'iZac'){|response|}     end          it "should mark the message as persistent when the option is specified on the parameter" do       @fanout.should_receive(:publish).with do |request|         request = @instance.serializer.load(request)         request.persistent.should == true       end              @instance.request('/welcome/aboard', 'iZac', :