qtp基础教程-descriptive programming

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1、WorkingwithDynamicObjectsObjectivesAftercompletingthischapter,youwillbeableto:Writescriptsthatoperateondifferentobjectsdependingonrun-timeinformation.Buildaprogrammaticdescription.CreateanduseaDescriptionobject.Identifywhenprogrammaticdescriptionsareuseful.DynamicObjectsversusSt

2、aticObjectsManyapplicationsconsistofdynamicobjectsinadditiontostaticobjects.Dynamicobjectsareobjectswhichdonotalwaysexistintheapplication,butratherarecreatedbasedonrun-timeinformation.Review:ObjectRepositoryforStaticObjectsQTPlearnsobjectsinyourapplicationandstoresthemintheObjec

3、tRepository.ThestepsofyourtestsandcomponentscanrefertotheobjectsbyusingtheirlogicalnamefromtheObjectRepository.IdentifyingDynamicObjectsTherearetwomethodsforidentifyingdynamicobjectsinyourQTPscripts:SetthepropertiesintheObjectRepositorytobedynamic.Useprogrammaticdescriptions.Set

4、tingDynamicValuesintheObjectRepositoryIftheobjectisdefinedintheObjectRepositorybuthasdynamicpropertyvalues,youcansetitsvaluesasfollowsintheObjectRepository:Usearegularexpressiontomatchvaluesthatvaryatrun-time.UseaparametertomatchinformationstoredinaDataTable.Withinthescript,refe

5、rtothedynamicobjectbylogicalnamejustasyouwouldanyotherobjectintheObjectRepositoryUsingProgrammaticDescriptionsProgrammaticdescriptionscanbeusedtoidentifyanydynamicobject,includingobjectsnotdefinedintheObjectRepository.Whenaprogrammaticdescriptionisusedinastatement,QTPbypassesthe

6、ObjectRepository.Youmayalsouseprogrammaticdescriptionstovalidatespecificpropertyvalueswhichmaybedynamic.Withprogrammaticdescriptions,supplyoneormorepairsofanobjectpropertyanditsdesiredvalue.QTPusesthesepropertiestoidentifythedesiredobject.Theoverallstepsforbuildingaprogrammaticd

7、escriptionareasfollows:Identifytheobjectclass.Selectobjectproperties.Codeaprogrammaticdescription.Objectidentifiedwithprogrammingdescriptionsareusedinyourscriptsjustlikeobjectsidentifiedthroughtheirlogicalnames.BuildingProgrammaticDescriptionsIdentifyingtheObjectClassTouseprogra

8、mmingdescriptions,firstidentifytheclassofthedes