Unittestingisperfectapproachtoidentifybugsandpossible regressionsbeforetheyimpactthedevelopmentwork.However, therearemultiplebestpracticesthatrequiresattentiontomake surethatyougetthedesiredbenefitsfromunittesting.ThisPDF talksaboutunittesting,whyitisimportant,andthebestpractices Javadevelopmentservicesfollowsfordesiredbusinessoutcome.
IntroductiontoUnitTestinginJava
UnitTestingisamethodologyfortestingdifferentunitsofsource codetomakesurethattheyoperateasneededInotherwords,unit testingensurethesmallestpartsofanapplicationaretestedto ensurethattheyworkproperly.
Unittestsarebasicallywrittenbydevelopers,whoemployunittests tomakesuretheircodeworksasdesiredanddoesnotbreakother codeparts.Unittestingisasystematicprocesstoensurethateach unitrunsasdesiredandthatitmeetsthespecificrequirements.
Itmayappearanoddprocess,butdevelopercandoonethingisto writeunittestsbeforebuildinganycode.Thisway,itbecomeseasy toperformtestingbeforeyoustartcodingThiscanalsoguideyou fromnothavingtowriteunnecessarycode. 2.AnalyzeTestCodeCoverage
Javaunittestsaremanageddependingontheircodecoverage, whichidentifiestheamountofcodetheycover.Itisagreattoolto learnhowimpactingyourunittestsare,andcanguidedevelopers improvethem.
Toknowwhatpercentageofthecodeinyourwholeapplicationis coveredbyunittests,justanalyzedifferentthings:alltheclassesin yourcodeandalltestsforallthoseclasses
3.ProceedwithSmallandFocusedUnitTests
Whenwritingaunittest,animportantthingtounderstandisto keeptheunittestsbothsmallandfocusedAJavaApplication TestingServicesshouldfocusontestingoneparticularthingata time.Thismakesthemeasiertowriteandmaintain,andalsomakes iteasiertopinpointwhichtestisfailingifabugisfound.
4.IsolateUnitTestsfromExternalDependencies
Duringthewritingofunittest,itisusefulforaprogrammerto isolatetheirtestsfromexternaldependenciesMajorexamplesof externaldependenciescompriseofdatabases,webservices,and othersoftwareelementsthatyourcoderelieson.
Managingallofthesethingsrunningwhiletryingtotestthecodeis achallengingconcernByisolatingunittests,programmerscan writethemquicklyandeasilywithouthavingtoconcernabout externalresourcesOnewaytoisolatetheseexternaldependencies iswiththeuseofmocksandstubs.
5.CreateIndependentCodeTests
ThefirststeptocreateJavaunittestsistomakesuretheyare independentofeachother.Programmersshouldbeabletorunany testandhaveitclearedinareasonabletimeperiod.Thissupports developerstocreatesometeststhatcanberunatanytimeand doesnotneedadditionalunittests.
Thekeyobjectivehereistotestsuitetooperatelikeanautomated acceptancetestforyourcodebase.Ifoneunittestispassed,then everythingispassed.Placeunittestsintheirpackagesandaway fromtheproductioncode.
WrappingUp
Implementinggoodcodingpractices,includingmeaningfulvariable namesandcomments,willhelptosimplifyJavacodedevelopment. Thiswillmakewritingofunittesteasyforyourcode
Unittesting,ifdoneintherightmannerbyfollowingthe recommendedtechniques,canyielddesiredresults.Youcanhire Javadevelopertomakesuretestsstayup-to-dateandofferuseful resultsWhentheyruntheyaddvaluetothedevelopmentlifecycle anddonotbecomeanoverhead.