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Asynchronous Testing in XCTest
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Shingo Tamaki
December 21, 2018
Technology
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Asynchronous Testing in XCTest
This document explain about asynchronous testing in XCTest
Shingo Tamaki
December 21, 2018
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Transcript
Asyncronous Testing in XCTest
XCTestʹ͓͚Δඇಉظॲཧͷςετ ඇಉظͷςετͷͨΊʹXCTestExpectationͱXCTWaiter༻ҙ͞ Ε͍ͯ·͢ɻ XCTestExpectationͷfulfillͷ࣮ߦΛ࣋ͬͯඇಉظॲཧͷྃͱ͠ waitͰࢦఆͨ͠expectationͷྃʹػ͢Δͷ͕جຊతͳྲྀΕ Ͱ͢ɻ • XCTestExpectation • XCTWaiter
XCTestExpectation func test_fetchPilot() { // 1.XCTestExpectationΛ࡞ let expectation = XCTestExpectation(description:
"pilot") PilotApiClient.fetchPilot(of: "new_type") { (result) in switch result { case .success(let user): XCTAssert(user.name == "REI") case .failure(_): break } // 2.ඇಉظॲཧͷ࣮ߦϒϩοΫͰfulfillΛ࣮ߦ expectation.fulfill() } // 3.waitؔʹexpectationΛࢦఆ wait(for: [expectation], timeout: 2) //<- 1ඵະຬͰςετࣦഊ }
XCTestExpectation • expectedFulfillmentCount • isInverted
XCTestExpectation expectedFulfillmentCountʹճΛࢦఆ͢ΔͱࢦఆճҎԼ λΠϜΞτͰςετࣦഊͱ͞Ε·͢ɻ /// RadarAPIClient͔Β·ͣ1ඵޙʹɺͦͯͦ͠Ε͔Β5ඵޙʹίʔϧόοΫ͕ฦ͖ͬͯ·͢ɻ /// ෳճίʔϧόοΫ͕࣮ߦ͞ΕΔΛߟྀͯ͠Έ·͠ΐ͏ ! let expectation
= XCTestExpectation(description: "radar") expectation.expectedFulfillmentCount = 2 let here = MyLocation(latitude: 35.664584, longitude: 139.730852) RadarApiClient.observeEnemy(from: here) { [expectation] (result) in switch result { case .success(let enemies): XCTAssert(enemies.count > 0) case .failure(_): break } expectation.fulfill() } wait(for: [expectation], timeout: 10)
XCTestExpectation isInvertedΛࢦఆ͢ΔͱfulfillΛ"࣮ߦ͞Εͳ͍߹"ʹςετ͕ ޭ͠·͢ɻ let expectation = XCTestExpectation(description: "inverted") expectation.isInverted =
true // fulfill͕ى͖ͳ͔ͬͨ߹ʹςετޭͱ͢Δ wait(for: [expectation], timeout: 1)
XCTWaiter
XCTWaiter ͔͜͜ΒXCTWaiterͷΛ͠·͢ɻ XCTWaiterwaitϝιουͳͲͷΑ͏ͳඇಉظॲཧͷྃΛ ͭͨΊͷॲཧʹ͍ͭͯͷػೳΛ୲͠·͢ɻ ྫ͑waitXCTWaiterDelegateͰఆٛ͞Ε͓ͯΓɺ XCTestCase͕͜Εʹ४ڌ͍ͯ͠·͢ɻ
wait(or waitForExpectations) • ॲཧྃ࣌ʹಛఆͷॲཧΛ࣮ߦ͍ͨ͠߹ • ඇಉظॲཧͷλΠϜΞτ͕ҟͳΔ߹ • ඇಉظॲཧͷऴྃॱ͕݅ͱͳΔ߹(enforceOrder)
wait(or waitForExpectations) ॲཧྃ࣌ʹಛఆͷॲཧΛ࣮ߦ͍ͨ͠߹ let expectation = self.expectation(description: "waitExpectations") DispatchQueue.main.asyncAfter(deadline: .now()
+ 0.5) { expectation.fulfill() //fulfillͳͩ͠ͱ.timeoutWhileWaitingʹͳΔ } // ίʔϧόοΫͷҾError?Ͱ͋Γɺਖ਼ৗ࣌λΠϜΞτ࣌XCTestError͕ฦ٫͞ΕΔ waitForExpectations(timeout: 1) { (error) in guard let error = error as? XCTestError else { return } switch error.code { case .failureWhileWaiting: print(" ! ࣦഊ࣌ͪ͜Β") //ਖ਼ίϨͷى͜͠ํ͕Θ͔ͬͯͳ͍ break case .timeoutWhileWaiting: print(" ! λΠϜΞτͷ߹ͪ͜Β") } }
wait(or waitForExpectations) ඇಉظॲཧͷλΠϜΞτ͕ҟͳΔ߹ ҰͭͷwaitͰॲཧͤͣʹෳͷwaitΛ͏ࣄͰλΠϜΞτͷ࣌ ؒΛ͚Δ͜ͱ͕Ͱ͖Δɻ let expForPilot = XCTestExpectation(description: "pilot")
fetchPilot(expForPilot) let expForColony = XCTestExpectation(description: "colony") fetchColony(expForColony) // λΠϜΞτͷ͕࣌ؒҧ͏ͷͰ͋ΕwaitؔΛෳʹ͚࣮ͯߦ͢Δࣄग़དྷΔɻ wait(for: [expForPilot], timeout: 2) wait(for: [expForColony], timeout: 4)
wait(or waitForExpectations) ಛఆͷॱ൪Λظͯ͠ςετ͢Δ߹enforceOrderΛtrueʹ͢ ΔࣄͰ࣮ߦྃॱग़ͳ͍߹ʹςετࣦഊͱ͢Δ͜ͱ͕Ͱ͖ Δɻ let expForPilot = XCTestExpectation(description: "pilot")
let expForColony = XCTestExpectation(description: "colony") // ྫ͑fetchColonyͷޙʹfetchPilot͠ͳ͚Ε͍͚ͳ͍ཁ͕݅͋ͬͨ߹ fetchColony(expForColony) { fetchPilot(expForPilot) } wait(for: [expForColony, expForPilot], timeout: 10, enforceOrder: true) //<- enforceOrderΛࢦఆ͢ΔࣄͰexpectationͷॱং·ͰݟΔ͜ͱ͕Ͱ͖Δ
৭ʑͳExpectationୡ
৭ʑͳExpectationୡ • XCTKVOExpectation • XCTNSNotificationExpectation • XCTNSPredicateExpectation • XCTDarwinNotificationExpectation
XCTKVOExpectation KVO(Key Value Observe)Λར༻ͨ͠Expectation KeyPathʹࢦఆͨ͠ϓϩύςΟͷࢹΛߦ͏ࣄͰར༻Մೳ let noobPilot = Pilot(id: "noob",
name: "Arbeo", abilities: []) let battleField = BattleField(pilots: [noobPilot]) let expectation = XCTKVOExpectation(keyPath: "mind", object: noobPilot) battleField.startBattle() wait(for: [expectation], timeout: 3)
XCTNSNotificationExpectation NSNotificationΛར༻ͨ͠Expectation ࢦఆ໊ͨ͠લͷ௨Λ࣋ͬͯྃͱ͢Δࣄ͕Ͱ͖Δɻ let noobPilot = Pilot(id: "noob", name: "Arbeo",
abilities: []) let battleField = BattleField(pilots: [noobPilot]) let expectation = XCTNSNotificationExpectation(name: Notification.Name("ͬͯΔʂͬͯΔͧʂ")) battleField.startBattle() wait(for: [expectation], timeout: 3)
XCTNSPredicateExpectation NSPredicateΛར༻ͨ͠Expectation ݅ʹ߹கΛॲཧྃͱ͢Δ͜ͱ͕Ͱ͖Δ let noobPilot = Pilot(id: "noob", name: "Arbeo",
abilities: []) let battleField = BattleField(pilots: [noobPilot]) let predicate = NSPredicate(format: "mind == 1") let expectation = XCTNSPredicateExpectation(predicate: predicate, object: noobPilot) battleField.startBattle() wait(for: [expectation], timeout: 3)
XCTDarwinNotificationExpectatio n Darwin NotificationΛར༻ͨ͠Expectation NSNotificationͱಉ͘͡ࢦఆ໊ͨ͠લͷ௨Λ࣋ͬͯྃͱ͢Δ ࣄ͕Ͱ͖Δɻ let noobPilot = Pilot(id:
"noob", name: "Arbeo", abilities: []) let battleField = BattleField(pilots: [noobPilot]) let expectation = XCTDarwinNotificationExpectation(notificationName: "ͬͯΈΔ͞ʂ") battleField.startBattle() wait(for: [expectation], timeout: 3)
͓·͚ Darwin Notify͏ͱΞϓϦؒແࢹͯ͠௨͕Ͱ͖·͢ɻ ϦδΣΫτϦεΫݱࡏௐࠪதɺ·ͨվΊͯ͠·͢ɻͯ࣍ ճ
Ҏ্