UI testing under iOS 11 has the ability to interact with other installed apps. Specifically,
XCUIApplication got a new constructor that takes a bundle ID. Let's see how we use this to put our deeplinks under automated tests.
What you basically do is create a helper-app,
MyHelperApp in below examples, that merely holds UIButtons for all the deeplinks your main app,
MyApp, should support. For
MyApp you register a URL scheme, and for
HelperApp you whitelist that very same scheme under the
LSApplicationQueriesSchemes key in
XCUIApplication constructor allows you to open
let helperApp = XCUIApplication(bundleIdentifier: "org.merela.MyHelperApp") helperApp.activate() helperApp.buttons[deeplink].tap()
...and there open a particular deeplink that
let url = URL(string: "\(myAppBundleId)://\(buttonTitle)") UIApplication.shared.open(url)
Finally, assert that the deeplink opened
MyApp in the expected state.
With Xcode 9, check out the sample project. To try it out, first install the
HelperApp and then run tests for the
MyApp target. Also make sure Simulator's 'Hardware Keyboard' is disabled.
Xcode 9 GM will be released soon, but until then you have to switch to Xcode-beta's toolchain, to be used by
xcodebuildcommands further below:
sudo xcode-select -s /Applications/Xcode-beta.app/Contents/Developer
This proof-of-concept script will make sure helper-app is always installed and ready to be used by main-app's UI tests:
HELPER_APP='MyHelperApp' MAIN_APP='MyApp' BUILD_DIR="/tmp/$HELPER_APP" DESTINATION="platform=iOS Simulator,name=iPhone 7 Plus,OS=11.0" # Build an .app for the helper-app xcodebuild build \ -destination "$DESTINATION" \ -target $HELPER_APP \ -scheme $HELPER_APP \ CONFIGURATION_BUILD_DIR=$BUILD_DIR # Install the helper-app onto the Simulator xcrun simctl install booted "$BUILD_DIR/$HELPER_APP.app" # UI test the main-app xcodebuild test -scheme $MAIN_APP -destination "$DESTINATION"
One other new API worth mentioning is
XCTContext.runActivity(named:block:), which logically groups subparts of each test-case, makes these groups visible in logs, and thus eases debugging:
There's plenty more: performance improvements (
firstMatch), screenshots, attachments, etc. - check out WWDC 2017's What's New in Testing.