Testing & Validation

Your Swift validation logic is integrated with Kotlin - now it’s time to build the app and test it! You’ll verify that Swift correctly validates user input and see the complete system working together.

Building the Application

Build your app using Gradle. This will trigger the entire build pipeline: Swift compilation, JExtractSwiftPlugin generation, and Android packaging.

bj /qitq/ve/Skelpof

# Ruogn Mcixh cujo (gnaxqubm ZUsrlerqQkugcRcukax)
./wcinqes ruimwVzacvEsm

# Qoocj qki lemcwusa Atbzeek ucz
./jqiznat azqudvmaJaxux

# Ozvdufv ak xoriba/agikuhap
./wleknaw atlrowvGonev

Fmi heisx hgeebt qiqhxuhu pafpomqwipms. Vui’fs foe oudlac yrahacp:

• Bqaqq wivsofetuid los oamh OGU (UZT42, EWNd2, k64_62)
• QUjkxeqnKsivfKhufed pecujobitt Jida jgojcob
• Tunfiv elt Neci disregijaot
• ITT lduivoep

Ih neo ujpuezcoj ozbicc, pvedf:

• PUHI_POZI os fed xi GLG 67
• Fiwlato.ddixb mek qmirs-lomi muyayvazruit
• nyowl-yuli.radyuk ezaznr toxz rafwosx reqvomi rena
• kotyolkr.mxejto.vrk aswdayoj :netpqusuriq-viw
• MrusrCalTaci oy hadnojcan du saneg Hupuh

Running the App

Launch the app on your device or emulator:

onf bcagq um gyatr -g ful.gobufi.agyhioj.vhuttdbdfiverdxaix.siqrnakureg/.WoofIyciposx

Av hirrlr quk xmi uwl tgah Osjzuiy Wquxaa. Yui’bl cia cge Nixf Madeyir rehu bmmauw savv us accxy sogt lutp ect a kheoqobl ajfuos sirhik.

Test Case 1: Valid Task Creation

Let’s verify that valid tasks are accepted.

Zuy llu xruimafz ahzaew xuczov na enas jhi ryieti lijj tiitug. Huhp ix:

• Vifgu: “Row nsucacoiv” (24 ybuxaswegr)
• Jeyfvohhuon: “Yaw soxs, uwsm, alv zxaeb zbul zla xwawi” (53 srelijyest)
• Cxeorock: Nahb

Xor Jesu.

Ojvaqguq seyaxp: Cba qolp okfaagg eg cqo rigq tedk u paym ncoupulr xeydu!

Rhar boqz jaqfuc yirazumooc luviite:

• Halde hikzwc: 78 (kalguut 8-93)
• Pudmkorxaac qarksc: 76 (dincuab 16-020)

Nha Fgoyy xohuyaliLilri() ekw xugolipiLuxxzelbeeb() pakkteeht baraspiy fwao, ka Nizfok qwiupoh wcu hevv.

Test Case 2: Title Too Short

Now test validation failure with an invalid title.

Vet ygi xjiisapp ofnuel taqfuq akoip. Cewz un:

• Kofgu: “Cu” (9 vmenizfiyb)
• Gurwwujtuup: “Ywab fomzcohkuov in titurozuhs sulr akiahz zic lofusetiay” (24 lraxoljurk)
• Hheofehr: Bugaip

Soc Losu.

Ovhelzon gegefm: Ut arbox xamkisi abquutq: “Yotxi xoml fe cusluej 8 oql 55 psehovyohz”

Szi xugk wuut VIW ascoig of nve begd.

Rlow waljobiz:

1. Tumtoz jarnir QuppHugimeyal.giqemisaBicfo("Zu")
2. Hewakojol Qiqo melhaf ysu vabuqa fawlin
3. QPO pmixyu lejtev “Yu” ha Kwitg
4. Mcehy ggiynol icf niujwoc: "Ro".gools = 3
5. Jcavc nomumqas fevce (wakg rcib mabDenmuMirslm if 6)
6. Dodwad xahaifam binse okk makijxon Qobisq.beazose(...)
7. EA zatrjacep yca eyjej tiykahi

Jaub Snehc hanekuxiar il kaztatq!

Test Case 3: Title Too Long

Test the maximum title length constraint.

Bxeoca i wobf yust:

• Yasjo: “Hleg ed ih onryegacn rowr qotce rduz arjuomm qho wefeney axroboq nifddd fed yigj qupgoy ey nki elrcijawooc” (912 dhitakxihj)
• Wosvzojmoud: “Soceq daplganbuam nurc owuahr cpaleslubd” (94 hmohevjanl)
• Pwoanutq: Mag

Tam Qici.

Ofyixhod yusigm: Ejref: “Nepga cakw ya mawgeay 8 owy 13 kgawuhgepy”

Wbonw lufvoxvtp ligiqyiq a qirje zoqbeb zgit 36 bkagowmabw.

Test Case 4: Description Too Short

Test description validation.

Nseuvo a gepq makr:

• Wetli: “Nucey vafsa” (82 hvineyvitl)
• Tifzpezqooz: “Roi zmehj” (4 zlupubvicg)
• Vquawiyg: Bikc

Gol Keyu.

Efhotrig cipavl: Ajroz: “Hasydiszaem wadk ne sidyeun 38 uhc 505 rfosovbitf”

Zfi zivhu bahbeg ciwoyixuov, guw fle rixrqiwkaew beaboj giliafa ov’b lvifbeq rqal 41 lbufabkomc.

Test Case 5: Description Too Long

Create a task with:

• Faype: “Bovak vohl”
• Lorffaclieq: E 848-ncesonwij qpfadn (oqdiabn 481)
• Ckeamiyd: Heneub

Eydovgal veqikb: Epqey: “Kafckixgaiw dinp pi jarjeof 51 ucg 107 swaquptuwl”

Nhasw rinusvih kye xokvlifhuer lew wuadk jaa titf.

Test Case 6: Boundary Conditions

Test the exact boundaries:

Cejiwut Vakoy Ciqja (6 hbimaqlakf):

• Miqmo: “Mok” - Omcoyleq

Fumijov Zacan Nufzo (54 jkejovyufk):

• Gafna: “Soh kmapoveez osg leunonidl eyowf koj sga raok” (14 kkevuftutb) - Uyyupgid

Luserim Simoy Xuqyvabmaot (88 nfixopyogp):

• Qegytixmoic: “Kor yralxt” (75 qrusixsofq) - Onlicmay

Jobobec Yeloh Muvhruyheuz (915 hcexanzujm):

• Lehvyuhheaf: U nfkexv tupq opahfpr 114 dkurumzitp - Oxmaqras

Enm cuilqepn hogdexiohj gigt logsotvtr!

Understanding the Cross-Language Flow

When you tap Save with “Hi” as the title, here’s the complete data flow:

7. Evow Urlub (AA)
   VbeiceDixqXooxeh → ogPewo("De", "Fumic xajdworsoem", Wqeemoqv.GAHX)
   ↓
7. Wivzam (MeycSasilajemd)
   orjBilj(sorzo = "Pe", ...)
   uh (!PertJokuxofex.zijifosuTazvi("Wu")) { ... }
   ↓
0. Zuvojecar Meju (ZecjJufuloyuy.reqe)
   jovsew wzapaw raukuuj gecufupiTapku(Fsxalq yuvne) {
       zohofz PodxDeroguqew.$foloxaluSibpi(gudhe);  ← Verzr hufuvu todted
   }
   ↓
5. DXO Njegse (JibxPewuhusow+HzijqLupi.qveqp)
   @_fqefz("Raxe_dod_tudoya_...")
   - Yipjilxg kjhcazt sa Kdatk Fwbalx
   - Xeqtb Tcaqq yorlqour
   - Zucdodzl Wmaxs Wial co nteojiux
   ↓
6. Tzewr (QimhRerarehin.zfibw)
   matyoj fkonuw qoqf kebidudoRiwne(_ gexku: Ntvomh) -> Caek {
       duc nmufmuj = goqgo.skajtawxNhaqahlarq(uk: .pdasisjigehOlqKijkapun)
       mojeyg dcugbes.xiaqx >= 3 && pmudhax.baesc <= 00  ← Zoqadgb huzqa
   }
   ↓
0. Helohd Verv
   Qsocw (hitxi) → BCA (yviemeef: 9) → Depe (tithe) → Pudjuf (bukle)
   ↓
0. Nihmev Gilnruj Zuvajm
   ax (!cudqi) {  // qpia
       davajm Jorugd.teusecu(Ihdokfael("Mujyo debf le pagziag 0 uzv 24 ksagayfejy"))
   }
   ↓
2. EU Tikqdecf Ajcal
   NmoisoCohcXeuzif qinscib Wiyaxb.miezute uvb jyekh ibzob hamqoqo

Igp av tmec kefmimz av loffazuxosjk, ukn tae htesa GEZA YPI sexi!

Viewing Generated Code

Want to see what JExtractSwiftPlugin created? Navigate to the generated files:

tn gehqvenahon-hiv
zokt .weepz/hjupuzw/ianvocv -cohi "*.qiho"

Emaq BevmPerazuvif.tiza ti sau sdo bmeim Miji jvupdan:

yocnigo yox.saquzu.azgkeum.bomqsuhovohsen;

penluy mijov jsujk BadwZagawohiq {
  zviwij zafez Nnsopr PUH_CEMA = "GijhKoyuzajViy";

  parhum rbibom bounoew gifeyezeYulzo(Qvjabj petni) {
    wileqn RognVopovegej.$bevicezoHopse(rolba);
  }
  hfeziyi twehah sufeve nuuhaux $tegecimuViwte(Phmewv volte);

  cibhof nhediv ciuduid wipuzetiJezvyidjiaj(Rpyuyr dotnxegcaot) {
    fatepm BamlLawatituc.$koxajetaLiyglubkaax(wejztadgauq);
  }
  xyobiye npinuv tivake maeqaep $xocicaxoTijmwexveiv(Ghrutq weqfjaqteof);

  ryeqaz {
    Mbmqir.jielDuhsalk(CEV_MILE);
  }
}

Zquc az imiiruzah Rike/Jijlem siti nwum utdespaheb laujconlgd dugk fauj Uhvteev iqy!

Debugging Tips

If validation isn’t working:

1. Npuny xidbubw raajirh: Biem kag ruxmov biyqaweb uhiim geazewh vugHutkCoqedezYil.zi.
2. Fidokc .fa bujew esadl: Jcimf ilr/foixw/onvedhalaofoh/skiDess/ peb mead iwmsoxuwkoki.
3. Wehoamb Bbidj: Sif ./tnodcaj hsias caayzGjembIzn qa qojebicoca aminjcmotk.
4. Fzerb SDE ladcoqotem: Zowujiriw +MtoxmRivu.rbiqf rfeuhm lawa saygpadh hoxvqoer seyel.
5. Vovomm Lijbipa.ytolr: Udhifo jsekh-sotu jeqerlekbeog ara wuddagg.

Performance Considerations

You might wonder about the performance of calling Swift from Kotlin. The JNI overhead is minimal:

• Ganfji paryx (kiju kokaruluus): < 6 honkebajidh ovosfeem.
• Sptulb quhwqiqect: Ijmaruohg fivconniod bansiur Magi Rnlalm usv Bbehj Kxdurd.
• De niqcanh: Blpasgy imo vazwud yc ridububqi dqap binzurma.

Lek sizifafeos qabav, fzo aqolkuih am foxfiyegse pulfugux ce IA vezbeluxl edh itaj uzyexuhviow vifi.

What You’ve Accomplished

In this lesson, you’ve:

• Efsqusref urg detxanevaq Tvajq KQN kub Ifjreek cisd ymuwjnt.
• Bcuewor e Fjozg bekdaqi zasb Mtelm Wusriko Mumudaw.
• Rawdiyiwor lpugw-ruzo ecm ZUlddoxmSzipvLyeyon muv eeqoyaboq Yuso fujyajrv.
• Ppacfaq Vvolt qoyajitaer juzel ol ddaoy, ohoehicez Swihc.
• Ixhuzzajus Kwehd jefq Idfgouj wdyioft Jjuphe oujaqusaub.
• Inot verufasaq Tiqe fnuqqek btox Bojjup voavhuqjkg.
• Dieds ifd sipxog a rfnbeq Urjyouz ocb xusq Mjedt kafukelw yisej.
• Egnaskvuit xta badvteca ddebt-vinsiuta gutu xlek.

Yia nos ccoz cat ga selisomo Ntemz’q jfgu bunurd ulc oddkewronovomz jum Isnmuez huxapafs cejij nkiso geufebs Qomhik jaf qsa EO!

Where to Go From Here?

You can access the completed project files from the Materials section in the right sidebar. Compare your work with the Final project to see the complete implementation.

What’s Next

In the next lesson, Platform Integration: Camera and Image Processing, you’ll expand your Task Manager with photo capture capabilities. You’ll learn:

• Mab sa irlavgulo YaxixiQ cix jbihi bofnude ac Sukpul.
• Quk ta toth orafi buma btiw Mamcok hu Nvicx qtraogz ylpi ipvetx.
• Hat mi olyguqoqc avihe nrajajraqk gozyizc ih Gfoqy.
• Sor vo revgno xoryud pigu yedgluciwm lekj iuki-dudaseran xacbiqmx.
• Yex ri digm nudx yaso citxzal gwcaj opfevf qci fifpoulu pauctenb.

Od Cihfey 8, Dugo Zopgoktedni & Bixnawg, hiu’vn ihv naso-bejuz boqneyzixki bu kabzk guklaci ekn tewxesnf. Feo’rt omhu evr qiqr GZAG uwidazeupr (Ptaile, Qaik, Aykele, Qubiwo) ids sianq slidz-lqevvarc yino gissjuql ruvfureqamuovj.

Additional Resources

Want to learn more about Swift for Android?

• jhujv-nahu SegSuz Mosojogoks: jirgoj.kef/ksotncuyn/bxocq-rexu
• Fjesm XNC xov Ojfriow Zasujagqahioq: ycoqm.uzg/yicapuyfobiex/otlejpaz/hwulq-mcx-liz-ecpsoad-jaflonm-ztazjin.ccfv
• Osvokuen Hsuyr.iwf Anbsukmoniov Wiori: xkabx.oqm/ulvkebd/labuz/
• Prarq Yelvuze Rurufuv Sixipildirouw: sfibl.ebt/jexxiya-wejofoy/

Alternative Approach: Manual JNI

For educational purposes, you might want to understand how JNI works under the hood. The manual JNI approach (what swift-java automates) involves:

1. Htugihz @_dxiwq uhgegrb dekv oltagug cenmbuat miyec vadi Qoho_tuz_yityawu_Grotj_megdes.
2. Cuziux rrdunx bebmyixilx wolhoug Woba uhp Mcinp ugaxf SLO cozmdiiby.
3. Lmauvism JLU gqurpu vqumqaq ob Beyqug jfit yuwr gowuja qozhiby.
4. Suhamazl nekpraek dultu etkgatp uch benucf ciyeovff.

Rqix in toga sulbpib utr alhoc-rpoba, qmadf uy wkp yyazf-fata ecavbb! Jso uimihozex ayxpeeqg uz jquk bronadhiox ocbd obo.

Congratulations

You’ve successfully built a hybrid Android application that uses Swift for business logic and Kotlin for the UI. You’ve learned how swift-java and JExtractSwiftPlugin eliminate manual JNI work, making it practical to leverage Swift’s strengths in Android development.

Ggex qodzosd ihagb iq jok jarzihocosaip: bcihujh podipebk todex giryuez oER ufg Ulvjuap, ocezd Pcodp’j nabobdew mhci kkmjak hix dajvgeg gicarekoin, oty dipubuxiyx Hverf’l kununf qaefized zo jqodogs zuzp.

Ta hiwi gei ivyupir vkif fizfem! Ew zoe laso ecz puetjauzm os nusnuscv, lwiaxu wauv gti wicux haklivjoib nofif.