Xcode 7 UI Testing: Dismiss Push and Location alerts

问题

I encountered a problem with Xcode 7 UI Testing.

The app displays two alerts after my user logs in, the Request Location Alert and the Push Notifications Alert. Those notifications are shown one right after the other. The Location one appears first.

I try to dismiss them automatically to start my tests.

In order to do that, I add two UIInterruptionMonitor, the first one for the Location Alert and the second one for the Notification Push Alert.

    addUIInterruptionMonitorWithDescription("Location Dialog") { (alert) -> Bool in
        /* Dismiss Location Dialog */
        if alert.collectionViews.buttons["Allow"].exists {
            alert.collectionViews.buttons["Allow"].tap()
            return true
        }
        return false
    }
    addUIInterruptionMonitorWithDescription("Push Dialog") { (alert) -> Bool in
        /* Dismiss Push Dialog */
        if alert.collectionViews.buttons["OK"].exists {
            alert.collectionViews.buttons["OK"].tap()
            return true
        }
        return false
    }

But only the Location one is triggered, the handler of Push Notifications UIInterruptionMonitor is never called.

If I return true in the Request Location UIInterruptionMonitor as this other post accepted answer specifies. Both handler are called but the alert parameter in both UIInterruptionMonitor links to the Request Location Alert View so the "OK" button is never found.

How can I dismiss those two successive alerts views?

回答1:

While not ideal, I found that if you simply wait until one authorization dialog has finished before presenting another one in the app, UI tests can pick up multiple requests in a row.

    if CLLocationManager.authorizationStatus() == .AuthorizedWhenInUse || CLLocationManager.authorizationStatus() == .AuthorizedAlways {
        self.locationManager.requestLocation()
    } else {
        self.contactStore.requestAccessForEntityType(.Contacts) { _ in
            self.locationManager.requestWhenInUseAuthorization()
        }
    }

I'm actually requesting access to contacts in a different place in my code, but it can handle multiple simultaneous requests just fine.

Then in my test:

    addUIInterruptionMonitorWithDescription("Location Dialog") { (alert) -> Bool in
        let button = alert.buttons["Allow"]
        if button.exists {
            button.tap()
            return true
        }
        return false
    }
    addUIInterruptionMonitorWithDescription("Contacts Dialog") { (alert) -> Bool in
        let button = alert.buttons["OK"]
        if button.exists {
            button.tap()
            return true
        }
        return false
    }

    app.buttons["Location"].tap()

    app.tap() // need to interact with the app for the handler to fire
    app.tap() // need to interact with the app for the handler to fire

回答2:

As I noted in the answer you mentioned, you must interact with the application after the alert appears.

Second, after presenting the alert you must interact with the interface. Simply tapping the app works just fine, but is required.

// add UI interruption handlers

app.buttons["Request Location"].tap()
app.tap() // need to interact with the app for the handler to fire

回答3:

class BaseTest: XCTestCase {
    let pushSent = NSNotification.Name.init("alert.pushSent")
    var notificationMonitor: NSObjectProtocol?

    override func setUp() {
        listenNotifications()
        let app = XCUIApplication()

        notificationMonitor = addUIInterruptionMonitor(withDescription: "Push Notifications") { [unowned self] (alert) -> Bool in
            let btnAllow = app.buttons["Allow"]
            //1:
            if btnAllow.exists {
                btnAllow.tap()
                NotificationCenter.default.post(name: self.pushSent, object: nil)
                return true
            }
            //2:
            //takeScreenshot
            XCTFail("Unexpected System Alert")
            return false
        }
        //3:
        //add code for "Request Location" monitor

        app.launchEnvironment = ["UITEST_DISABLE_ANIMATIONS" : "YES"]
        //4:
        app.launch()

    }

    func listenNotifications() {
        NotificationCenter.default.addObserver(forName: pushSent, object: nil, queue: nil) { (notification) in
            if let locationDialogHandeler = self.notificationMonitor {
                //5:
                self.removeUIInterruptionMonitor(locationDialogHandeler)
            }
        }
    }
}

1: Check if you're in the correct alert, tap the button and find a way to remove the monitor (I'm using NotificationCenter)

2: If you enter a monitor and can not find the right button, it means it's an unexpected flow. Fail the test (but take a screenshot first).

3: Add other monitors

4: I am adding monitor even before launching the app. If you add a monitor after the alert appears, it will not be triggered.

5: Remove the monitor, that way when a new alert appears, the next monitor in the stack will be called.

P.S: You should add monitors in reverse order, therefore, add "Request Location" after "Push Notifications"

回答4:

To dismiss system alert views (ie: Push Notification) you can define custom flags for the testing environment.

Then, you just have to change the application's code to avoid specific initialisations (ie: Push Notification) :

#if !TESTING
let settings: UIUserNotificationSettings = UIUserNotificationSettings(forTypes: [.Alert, .Badge, .Sound], categories: nil)
application.registerUserNotificationSettings(settings)
#endif

I use this trick in order to be able to take screenshots with snapshot.

来源：https://stackoverflow.com/questions/33875301/xcode-7-ui-testing-dismiss-push-and-location-alerts