Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Architecting your apps for UI Testing
Search
Karumi
September 15, 2016
Programming
5
670
Architecting your apps for UI Testing
Talk given at NSSpain 2016
Karumi
September 15, 2016
Tweet
Share
More Decks by Karumi
See All by Karumi
A story of comics, neural networks, and Android!
karumi
0
140
Kotlin and Spring boot a pleasant experience and some rough edges
karumi
0
79
kotlin for android developers
karumi
0
200
Dame tus tipos pegaso
karumi
0
130
One page product design
karumi
0
110
Version Control Systems for Researchers
karumi
1
250
Tensor flow for Android
karumi
0
120
Architecture Patterns in Practice with Kotlin
karumi
7
400
Kata Screenshot for Android & iOS
karumi
0
330
Other Decks in Programming
See All in Programming
iOSエンジニア向けの英語学習アプリを作る!
yukawashouhei
0
180
Model Pollution
hschwentner
1
180
AI Coding Meetup #3 - 導入セッション / ai-coding-meetup-3
izumin5210
0
590
プログラミングどうやる? ~テスト駆動開発から学ぶ達人の型~
a_okui
0
190
私はどうやって技術力を上げたのか
yusukebe
43
17k
CI_CD「健康診断」のススメ。現場でのボトルネック特定から、健康診断を通じた組織的な改善手法
teamlab
PRO
0
180
CSC509 Lecture 06
javiergs
PRO
0
240
どの様にAIエージェントと 協業すべきだったのか?
takefumiyoshii
2
600
あなたの知らない「動画広告」の世界 - iOSDC Japan 2025
ukitaka
0
380
Go言語の特性を活かした公式MCP SDKの設計
hond0413
1
180
Catch Up: Go Style Guide Update
andpad
0
170
ソフトウェア設計の実践的な考え方
masuda220
PRO
3
480
Featured
See All Featured
The World Runs on Bad Software
bkeepers
PRO
71
11k
Large-scale JavaScript Application Architecture
addyosmani
514
110k
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
32
2.2k
Performance Is Good for Brains [We Love Speed 2024]
tammyeverts
12
1.2k
Java REST API Framework Comparison - PWX 2021
mraible
33
8.8k
Keith and Marios Guide to Fast Websites
keithpitt
411
22k
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
132
19k
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
140
34k
Why Our Code Smells
bkeepers
PRO
339
57k
RailsConf 2023
tenderlove
30
1.2k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
PRO
188
55k
The Art of Programming - Codeland 2020
erikaheidi
56
14k
Transcript
Architecting your apps for UI Testing Alberto Gragera Co-Founder and
Technical Director @gragera_
[email protected]
This is NOT about acceptance tests
Why invest in UI Testing?
Test from the user’s point of view
Reproduce any imaginable scenario
Architecture
GOOD ARCHITECTURE Readability Testability Embrace change Robustness
BAD ARCHITECTURE Fear of change Lots of WTFs Hacks Mystic
knowledge
What main features should your architecture have to enable you
to write UI tests effectively?
Each layer must have a crystal clear purpose and responsibilities
Be able to replace the dependencies to inject test doubles
Disclaimer: Viper-ish
UI PRESENTER USE CASE NAVIGATOR REPOSITORY DATA SOURCE … N
… COMPOSITION ROOT COMPOSITION ROOT A … N …
UI PRESENTER USE CASE NAVIGATOR REPOSITORY DATA SOURCE … N
COMPOSITION ROOT COMPOSITION ROOT A … N … …
UI Abstraction over UIViewController Passive Views
Use Cases Gateway to the “data” world Expose what your
domain layer can do
Navigator Navigates from one screen to another Knows about the
state of the screen at any given time Handle the presentation of this new screen
CompositionRoot Knows how to instantiate every collaborator of the app
Knows about the particulars of a collaborator
Presenter Tell the UI what to do Tell Navigators where
the user wants to go Execute Use Cases KEY point for dependency injection
How does this look like in a real app?
FoursquareTop
App launch
Screen AppDelegate private func installRootNavigator() { let builder = AppCompositionRoot.Builder()
appCompositionRoot = builder.with( venueCompositionRoot: VenueCompositionRoot() ).build() navigator = RootNavigator( appCompositionRoot: appCompositionRoot ) navigator.installRootViewController(window!) window?.makeKeyAndVisible() } 1 2 3
DEPENDENCIES RootNavigator func installRootViewController(window: UIWindow) { let vc = appCompositionRoot.getInitialViewController()
currentNavigationController = vc window.rootViewController = vc }
DEPENDENCIES AppCompositionRoot class AppCompositionRoot { let venue: VenueCompositionRoot func getInitialViewController()
-> UINavigationController { let vc = venue.getBestVenuesAroundViewController() return UINavigationController(rootViewController: vc) } }
DEPENDENCIES VenueCompositionRoot func getBestVenuesAroundViewController() -> UIViewController { let vc =
BestVenuesAroundYouViewController() vc.venuesAroundYouPresenter = BestVenuesAroundYouPresenter( ui: vc, getBestPlacesAroundYouUseCase: getPlacesAroundYouUseCase(), getUserLocationUseCase: getUserLocationUseCase(), navigator: getVenueListNavigator() ) return vc }
Going to a venue detail
TAP
presenter.venueSelected(venue) UI navigator.goTo(venue) PRESENTER compositionRoot.getVC(venue) pushViewController() NAVIGATOR
Screen BestVenuesAroundYouViewController func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) { guard
let venue = ds.venue(atIndexPath: indexPath) else { return } venuesAroundYouPresenter.venueSelected(venue) }
Screen BestVenuesAroundYouPresenter func venueSelected(venue: VenueViewModel) { navigator.goTo(venueDetail: venue) }
DEPENDENCIES VenueListNavigator func goTo(venueDetail venue: VenueViewModel) { let vc =
appCompositionRoot.venue.getVenueDetailViewController( forVenue: venue ) currentNavigationController?.pushViewController( vc, animated: true ) }
Testing this
STRATEGY
UI PRESENTER USE CASE NAVIGATOR REPOSITORY DATA SOURCE … N
… COMPOSITION ROOT COMPOSITION ROOT A … N …
TEST main.swift let appDelegateClass = Environment().isInTestingRun() ? NSStringFromClass(AppDelegateForTests) : NSStringFromClass(AppDelegate)
UIApplicationMain( Process.argc, Process.unsafeArgv, nil, appDelegateClass )
TEST AppDelegateForTests func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject : AnyObject]?)
-> Bool { window = UIWindow(frame: UIScreen.mainScreen().bounds )! window.backgroundColor = .whiteColor() window.makeKeyAndVisible() window.rootViewController = UINavigationController() return true }
TEST BaseUITest func openViewController() { let appCompositionRoot = getTestingAppCompositionRoot( baseAppCompositionRoot
) rootNavigator = RootNavigator( appCompositionRoot: appCompositionRoot ) presentViewController( keyWindow, navigator: rootNavigator, appCompositionRoot: appCompositionRoot ) } 1 2 3
Test Cases
TEST BestVenuesAroundYouViewControllerTests class BestVenuesAroundYouViewControllerTests: BaseUITestCase { private var stubVenueListNavigator: StubVenueListNavigator!
private var getUserLocation: StubGetUserLocationUseCase! private var getBestPlacesAroundYou: StubGetBestPlacesAroundYouUseCase! override func setUp() { super.setUp() getUserLocation = StubGetUserLocationUseCase() getBestPlacesAroundYou = StubGetBestPlacesAroundYouUseCase() stubVenueListNavigator = StubVenueListNavigator() }
TEST BestVenuesAroundYouViewControllerTests override func getTestingAppCompositionRoot(compositionRoot: AppCompositionRoot) -> AppCompositionRoot { return
AppCompositionRoot.Builder() .with(venueCompositionRoot: getVenueCompositionRoot()) .build() } private func getVenueCompositionRoot() -> VenueCompositionRoot { let venueCompositionRoot = TestingVenueCompositionRoot() venueCompositionRoot.stubGetUserLocation = getUserLocation venueCompositionRoot.stubGetBestPlacesAroundYou = getBestPlacesAroundYou venueCompositionRoot.stubVenueListNavigator = stubVenueListNavigator return venueCompositionRoot }
TEST func getGetUserLocationUseCase() -> GetUserLocationUseCase { return GetUserLocation( gps: getGPS(),
repository: getVenueDataSource() ) } func getGetUserLocationUseCase() -> GetUserLocationUseCase { return stubGetUserLocationUseCase } VenueCompositionRoot TestingVenueCompositionRoot
TEST BestVenuesAroundYouViewControllerTests func testLoadingIndicatorIsVisibleWhenLoadingVenues() { givenWeAreFetchingUsersLocation() openViewController() waitForViewWithLocalizedAccessibilityLabel(.Loading) } override
func presentViewController(window: UIWindow, navigator: RootNavigator, appCompositionRoot: AppCompositionRoot) { presentViewController( appCompositionRoot.venue.getBestVenuesAroundViewController() ) }
TEST BestVenuesAroundYouViewControllerTests func testOpenSettingsIfTheGPSAccessIsDeniedAndTheUserOpensSettings() { givenThereWillBeAnErrorFetchingUserLocation(error: .AccessDenied) openViewController() tapGoToSettings() expect(
stubVenueListNavigator.didNavigateToSettings ).toEventually( equal(true) ) } GIVEN WHEN THEN
TEST BestVenuesAroundYouViewControllerTests func testRetryShowsVenuesAfterThereIsAnErrorFetchingUsersLocation() { getUserLocationUseCase.givenThereWillBeAnErrorFetchingUsersLocation() openViewController() expectCanNotFetchLocationError(toBeVisible: true) getBestPlacesAroundYouUseCase.givenThereWillBeVenues()
tapRetry() expectVenueList( getBestPlacesAroundYouUseCase.venueList ) expectCanNotFetchLocationError(toBeVisible: false) }
Testing the real navigation
TEST BestVenuesAroundYouViewControllerNavigationTests override func presentViewController(window: UIWindow, navigator: RootNavigator, appCompositionRoot: AppCompositionRoot)
{ navigator.installRootViewController(window) } override func getTestingAppCompositionRoot(compositionRoot: AppCompositionRoot) -> AppCompositionRoot { return AppCompositionRoot.Builder(compositionRoot: compositionRoot) .with(venueCompositionRoot: getVenueCompositionRoot()) .build() } private func getVenueCompositionRoot() -> VenueCompositionRoot { let venueCompositionRoot = TestingVenueCompositionRoot() venueCompositionRoot.stubGetUserLocationUseCase = getUserLocationUseCase venueCompositionRoot.stubGetBestPlacesAroundYouUseCase = getBestPlacesAroundYouUseCase venueCompositionRoot.stubGetVenueDetailsUseCase = getVenueDetailsUseCase return venueCompositionRoot } private func getVenueCompositionRoot() -> VenueCompositionRoot { let venueCompositionRoot = TestingVenueCompositionRoot() venueCompositionRoot.stubGetUserLocation = getUserLocation venueCompositionRoot.stubGetBestPlacesAroundYou = getBestPlacesAroundYou venueCompositionRoot.stubVenueListNavigator = stubVenueListNavigator return venueCompositionRoot } BestVenuesAroundYouViewControllerTests
TEST BestVenuesAroundYouViewControllerNavigationTests func testNavigatesToVenueDetailWhenUserTapsOnVenue() { getVenuesUseCase.givenThereWillBeVenues() let topVenue = getVenuesUseCase.getTopVenue()
getVenueDetailsUseCase.venue = topVenue openViewController() tapTopVenue() expectTitle(ofVenue: topVenue, toBeVisible: true) } GIVEN WHEN THEN
Why is all this possible?
Thanks!
Questions?