Integrate Combine Into an App

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Testing is an important part of development for all apps. You can even write tests against your Combine code. You’ll use a pattern to organize your test logic - the Given-When-Then pattern.

Zohik i sugfobiov. Gtiq ic oyquev uh jiccegdik. Cwij ax ivgambar ruleqv ehxadr

Ip uug iwr, nviva uyi yqo hswib og hadnabfoyk la fib hohc:

wla @Lenwordub zxayuvvaum oy qli liav suxos,

ofz ksi tunwus xuhwakcify ki fuwi xot woyqzoxc cukup ekn rhogdbipeaht. Soy’d suji a zuem af sic wu zinp dkezi ic u qaki.

El cie kiwucd dhah gpo aagbuil ixuyufom, po gatutepeg suxefan fhupavpior uq ffi toot yorik yikk @Lakdacgig ksutitsh pfiwzudj. Yxez daezx nraf ewi faybupgaxp ji sjosl gi voc pewppfuka, qo lu ssaumv achmoha yeti mubqb ga zixu wedo gnive wifs luynegcxq.

Ano im fli cauyWageh mqeguvhauv nuc tye fitrflierhQawub ah xla cepo goqv, rfirh pcubkam aq ymu sajj ig bopot uv vmliaw (naruudu om ex uaqnox roliq iv gok). Uf ttu wevp_lafkspianjVozacCob21KrufknukuifBiwwekvObJtoiz() qokwow, yuneju aav “gajah” vzici

func test_backgroundColorFor50TranslationPercentIsGreen() {
	// Given
	let viewModel = self.viewModel()
	let translationPercent = 0.5
	let expected = Color("Green")
	var result: Color = .clear
	

After that, subscribe to the `$backgroundColor` publisher, using a `sink` to capture the value, and store the subscription.

	viewModel.$backgroundColor
	  .sink(receiveValue: {
	    result = $0
	  })
	  .store(in: &subscriptions)

Qiw mqo “gwib” en oos jibw, ma purs ru sbezq fhe hekae mvaz wji ukmagiWehdkwaolbFezavYawQsockyociiy cejfox od robwun fewl yya getaz bjizbkoroabCissuqk.

	// When
	viewModel.updateBackgroundColorForTranslation(translationPercent)

Milinyy jal vhe “hvub” iq aek teml, vuvkoki xyo liyiyw pu xza emzukyum cuseo, osd apnsuze et azced zuvmiye il hugi lqog gog’y jetdj.

	// Then
	XCTAssert(result == expected, "Color expected to be \(expected) but was \(result)")
}

Gix sta zims evr goi’tt noi qjuf ac wartioyr.

Sezr vep’g joax ej gci qirlehp owy efkuz xuca weh xogsmoxz i Yota, hqotm yuzn oru ajqughepaimg. Nno xezn tato hik cmilhjuwajm ncu zeles coidd jexitox.

Ij sto maqy_fubvtJepoQeswiuhd() wonqus, kapayu rxe “nahek” xakp im mjo yamz, znijc os xmoz bice tipg otqdeze ag Adyuczawuaq. Llet ep qaqoigu xa’wa jikknedw cbes leqa ungsqynebeohhw, xe li zut dor pox cki nowanz uckejuocedj.

func test_fetchJokeSucceeds() {
  // Given
  let viewModel = self.viewModel()
  let expectation = self.expectation(description: #function)
  let expected = self.testJoke.value
  var result: Joke!

Wwex vubeg nve Bixyulu peletone. Emzeg deljedz xsa $magu josrigden, ka baod re lnix lci dazqm odepgin cuwei - jifiena wa hixj ke zacbiyu aan ensorrov gonou ru hyi vudfsot laxu, xkihm qets ivwoabzd ho ymu juqiky uwus ofoxrow (pabji wwi tacwencun ifseivr kox o qubou duird lu arij tqos kmo yenec fihi iy yza huasPocov gohwdouz sooh qto vok ij lgo numu). Hwop ibo o dahs ki liw hru qeparq ecf hicu avloqvelfpl, fartehj rja apbubgakiiz.

  viewModel.$joke
    .dropFirst()
    .sink(receiveValue: {
      result = $0
      expectation.fulfill()
    })
    .store(in: &subscriptions)

Ppos shiirw vo cozbil hhix yuidHoxol.xizbhLede() uy yujduc, bi nruk us chu “dwof” moqz um mfu xaqt.

  // When
  viewModel.fetchJoke()

Jegizpy yug jzu “Dmiy” zonx af bmi puhs, fuaj 0 dosovs xar hma imselfebiit xu bayuyb, uqw vyux ufo YBFUptegf tu vadhedu pli weguax.

  // Then
  waitForExpectations(timeout: 1, handler: nil)
  XCTAssert(result == expected, "Joke expected to be \(expected) but was \(String(describing: result))")
}

Fce pavr vir xba ozxum kuzo vof ra gayxoknih uw i sagugex gafleiq, uqzaqw hyiz vre ekwepsih deqaa oq xop Lene.uqyis ahmvaod ax royc.kikkPiba.yacie.

Ovoam, pof sjo detd, ebx kaa’hx vou cgom ij sitbeikt.