groovy - Saving argument method with MOP -

i doing integration tests spock 3rd party apps. struggling problem not sure wether approaching issue or not.

in 1 of tests connecting 3rd party service information in array. each of these items passed method process them individually.

def get3rdpartyitems = {    [item1, item2, item3] }  def processitem = { item ->    //do item }  get3rdpartyitems.each {    processitem(it) } 

then have test connects real 3rd party service using method get3rdpartyitems() in testing processitem called many times items has returned method get3rdpartyitems().

what trying save 1 of items @shared variable write test know item processed don't want mock content retrieved 3rd party service want real data.

basically, doing:

@shared def globalitem  myclass.metaclass.processitem = { ->    if (!globalitem)       globalitem =    //and need call original method processitem } 

any clue how achieve this? overheading open change solution.

not sure if want, it's hard see existing structure code , code isn't runnable as-is, given class:

class myclass {     def get3rdpartyitems = {         ['item1', 'item2', 'item3']     }      def processitem( item ) {         println item         //do item     }      def run() {         get3rdpartyitems().each {             processitem( )         }     } } 

you can this:

def globalitem def oldprocessitem = myclass.metaclass.getmetamethod("processitem", object)  myclass.metaclass.processitem = { item ->     if (!globalitem) {         println "setting global item $item"         globalitem = item     }     oldprocessitem.invoke( delegate, item ) } def mc = new myclass() new myclass().run()