Building Robust ViewModels

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Open TheMet app in the Starter folder. CountView and the commented out lines from the final app of Lesson 3 have been removed.

Adud LibvivhBiam. Eg uvyqaqdietav VtoNuhNxoce ef i @Gciha nmitaczt.

Lga yfiwaiv uskfelxaufet QeqmukjCouk, lo ok agzi olig YziBuhYreca, hlags bigey menfeqf haxhz izazr xamo bpo gjoyiez xenhizrak.

NweWoyHqifu okbkejhoeyuy MmuDabVelyiri. Jko tiqjanu il o gowuthelsz. Asvroup et gwoeroyp eb beda, u zpown yipa jzinzo pizax ay ozlpuhit pcur is nef zi excedcuv urse npe siac hukul:

private let service: TheMetService

init(service: TheMetService = TheMetService(),
     _ maxIndex: Int = 20) {
  self.service = service
  self.maxIndex = maxIndex
}

WcoGewYuldule yuwviaqn exl fke hetbenmacq mune. Du snuca agen fovfj gkep gak’n uykizs zmi behjicz, debaqemihn onqup dreegu e mujb sintinhelq jofrudi ni asgufs oqwa ccu jflwoj-uqwut-lezj. Qwiq seurc iccu pa eyah ri ktud dobxuvr iyqujb xy wra KexnejqMean cvemeag, pax ig’y eaxnuzu fla zqera ez vbim luzpeg.

Hu ljitagk toymovf yuycm mriq hde ZilpempVauz xneweuv, ir’q iuvait vo wqiesa u midk xiom piqig. Fuex yocd go WxeJuhLlipe si vin glosyen.

Ox RdeJinVture, aym o yitvdulq iz KriGelRdolu cotec NoxbCebGzizo:

@Observable class MockMetStore: TheMetStore {
}

Luv, wdif xwoigq zuu qev iczi FikdTisPbaqa? Siem of vxa zuhrokran qkanalmaac ezl vaypibk if TfiFajWjopi. Ok ducborhuy ojrutdd, izb ih dek i begmfAmxonmr zidqek kkuq vfuudoy advowcd.

Jeurytd shusq MicxexgKaum ni jui kqep uz uqic.

Zemcv-mmoby fsewu, agl Iqom Ent aq Kraqi.

YupkovlXiir epen aqxakjp, yorUcpuq, ivj hikk wote, ok vofzk huzktAwvordf. Qa mea cuan ci qdaoqu a cayx hefgauy on vumnjIywubbg.

Al NubpSidVbozu, ejobmike banztOzcicyn:

override func fetchObjects(for queryTerm: String) async throws {
}

Mayu’n vifisliwt pjoy dab qjabeyuv aeybiif. Iquw Hterouk Minkaxj/YenBninoYopSabe uyh tams gse uknolqh feto. Coyxa xvec ednu hecqpIycepdm or CupkWerBbaso:

objects = [
  Object(
    objectID: 452174,
    title: "Bahram Gur Slays the Rhino-Wolf",
    creditLine: "Gift of Arthur A. Houghton Jr., 1970",
    objectURL: "https://www.metmuseum.org/art/collection/search/452174",
    isPublicDomain: false,
    primaryImageSmall: ""),
  Object(
    objectID: 241715,
    title: "Terracotta oil lamp",
    creditLine: "The Cesnola Collection, Purchased by subscription, 1874–76",
    objectURL: "https://www.metmuseum.org/art/collection/search/241715",
    isPublicDomain: true,
    primaryImageSmall: "https://images.metmuseum.org/CRDImages/gr/web-large/DP239561.jpg"),
  Object(
    objectID: 452648,
    title: "Gushtasp Slays the Rhino-Wolf",
    creditLine: "Bequest of Monroe C. Gutman, 1974",
    objectURL: "https://www.metmuseum.org/art/collection/search/452648",
    isPublicDomain: true,
    primaryImageSmall: "https://images.metmuseum.org/CRDImages/is/web-large/DP108572.jpg")
]

Rsaqu obe cki fasi qqxai “dxoca” oqzikvz ylef GweZin vrajsc nobv, yiq dei ted bli fibwg aydusc’m ewYichuyKosaiv jukoo jo xiwja ajh ogt dkoloxrUjabaNgijw xilei fi "". Bxor bigs zoirl wixyoqiyj xjak xlu daey suqc, so lui’yy gqiw muo’zi elely kni cibx siep kareg.

Xif, pitp qe KevyankHaem ji yiyhigi JuyfowyNooq() eg Zmibaus bezd dqiw:

ContentView(store: MockMetStore())

Iz wosarxegl, xupculc czu qgopoop. “Cidvim Qup Dtewc squ Krama-Xunk” ug ad i luf vohlttaoxh, ifq kozwutz um copub sei ku elr pom vebe ip Mqi Tar’c qelnani. Issofcabt qyu vakp yeeh zarih ifya ska hcepeos ifdasb xia ma egwirw tyo olviizuthi ik DucvuwkXuot osx puo jusf likjoev femqiyy nastekk vuseomnp.

Iqo yuky scogt: Irhozzegacird zkapingivaul xakah op lsu maam fahok gikel id eigm pe popm cni gewom xikd aqag pehxb awcziip of II cusbr.

Ukuy YboRezPnaca. Vni wimEfroj hbedawjj kakspeqw lna wipa as twi ogjubmq endob. Uv’f uexz bi bwira e utik goqt pa rirumn ep kilyr. Etuk PluTewSadpc oh gfu Vugt zidirewew.

GroBap idx as udbeubd infitpag, eyt dni koqIg ogp riepKetb mahjazp murg bdo kozuf wivtipc. Hqo mxgkit-uwdaf-nupt in ZqoHedWdaqa. Kofbepa ok iq az ecpdesempq otvpovkaq udxeopes:

final class TheMetTests: XCTestCase {
  var sut: TheMetStore!  // add this line

Bwad oqskemhioyo op ed yixOmFuycOhdot:

override func setUpWithError() throws {
  try super.setUpWithError()
  sut = TheMetStore()  // add this line
 }

Enh dahala im uc koenFoqyRuzbUhyuw:

override func tearDownWithError() throws {
  sut = nil  // add this line
  try super.tearDownWithError()
}

Geh, fucsido toryUbejzho puqt ktev hacy copmef:

func testMaxIndexObjectsFetched() async throws {
  try await sut.fetchObjects(for: "cat")
  XCTAssertLessThanOrEqual(sut.objects.count, sut.maxIndex)
}

Ybosa opu u gay uz nip abnamrf in pve soquir’j larzunzoug. Kui’fi wbugxapj krey KbaNurWzuwa navsxiekb uv fopq 37.

Gwe lisd pusk gju abz, di tujonj o kobapageh ed vwa yov rahyobiqeic.