Create and run unit tests, performance tests, and UI tests for your Xcode project using XCTest.

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WeScan.ImageScannerControllerError iPhone Simulator
Hi everyone, I've got an issue with the iPhone simulator version 15 iOS 17.0. Every time a test attempts to take a photo, the app directs to the camera software and then this error appears. For my colleagues instead, they've been directed to the gallery. The only difference is that my machine is M1 while theirs is with Intel chip. I'm using MacOS 13.6.3, the same as them. Does anyone have any idea why this could happen? Thank you in advance.
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XCTest stuck and has error when take snapshot element on screen has much elements
Dear Apple Developer [Background] We are developing a service running on test mode based on XCTest Framework to support streaming, remote and automation testing with iOS devices. After we upgrade macOS Sonama and Xcode 15 version for upgrade XCTest for support iOS 17 around Jan-2024, we saw We noticed that our running on test mode services stuck and hanging frequently after a period of time. We have investigate and tried debug code and we found that main thread stuck and hanging when it call requesting snapshot of accessibility hierarchy for app. At the same time, we noticed that the application we were testing stuck and hanging too. [Environment] Application testing: Tiktok MacOS: Sonoma 14.5 Xcode: Version 15.4 (15F31d) Device test: iPhone 12 (iOS 14.8.1) Log detail: t = 1524.15s Wait for com.ss.iphone.ugc.Ame to idle t = 1536.54s Find the Application 'com.ss.iphone.ugc.Ame' t = 1536.54s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 1597.56s Find the Application 'com.ss.iphone.ugc.Ame' (retry 1) t = 1597.56s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 1658.58s Find the Application 'com.ss.iphone.ugc.Ame' (retry 2) t = 1658.58s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 1718.58s Collecting extra data to assist test failure triage t = 1718.58s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 1778.59s Requesting snapshot of accessibility hierarchy for app with pid 509 2024-08-19 14:16:44.990260+0700 WebDriverAgentRunner-Runner[489:97809] Issue type: 0 2024-08-19 14:16:44.990428+0700 WebDriverAgentRunner-Runner[489:97809] Enqueue Failure: Failed to get matching snapshot: XCTPerformOnMainRunLoop work timed out after 60.0s ((null)) (null) 0 0 t = 1843.71s Find the Application 'com.ss.iphone.ugc.Ame' t = 1843.71s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 1874.72s Find the Application 'com.ss.iphone.ugc.Ame' (retry 1) t = 1874.72s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 1940.76s Find the Application 'com.ss.iphone.ugc.Ame' (retry 2) t = 1940.77s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 2005.80s Collecting extra data to assist test failure triage t = 2005.80s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 2066.58s Requesting snapshot of accessibility hierarchy for app with pid 509 2024-08-19 14:21:33.019582+0700 WebDriverAgentRunner-Runner[489:97809] Issue type: 0 2024-08-19 14:21:33.019687+0700 WebDriverAgentRunner-Runner[489:97809] Enqueue Failure: Failed to get matching snapshot: Unable to perform work on main run loop, process main thread busy for 30.0s ((null)) (null) 0 0 2024-08-19 14:21:33.020647+0700 WebDriverAgentRunner-Runner[489:97809] Issue type: 0 2024-08-19 14:21:33.020722+0700 WebDriverAgentRunner-Runner[489:97809] Enqueue Failure: No element snapshot found for Application 'com.ss.iphone.ugc.Ame'[0.00, 0.00] -> (200.0, 259.0) ((null)) (null) 0 0 2024-08-19 14:21:33.020801+0700 WebDriverAgentRunner-Runner[489:97809] *** Assertion failure in -[XCPointerEventPath initForTouchAtPoint:offset:], XCSynthesizedEventRecord.m:263 t = 2291.08s Find the Application 'com.ss.iphone.ugc.Ame' t = 2291.08s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 2352.10s Find the Application 'com.ss.iphone.ugc.Ame' (retry 1) t = 2352.10s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 2413.11s Find the Application 'com.ss.iphone.ugc.Ame' (retry 2) t = 2413.11s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 2473.12s Collecting extra data to assist test failure triage t = 2473.12s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 2533.13s Requesting snapshot of accessibility hierarchy for app with pid 509 2024-08-19 14:29:19.552744+0700 WebDriverAgentRunner-Runner[489:97809] Issue type: 0 2024-08-19 14:29:19.553054+0700 WebDriverAgentRunner-Runner[489:97809] Enqueue Failure: Failed to get matching snapshot: XCTPerformOnMainRunLoop work timed out after 60.0s ((null)) (null) 0 0 t = 2598.27s Find the Application 'com.ss.iphone.ugc.Ame' t = 2598.28s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 2659.29s Find the Application 'com.ss.iphone.ugc.Ame' (retry 1) t = 2659.29s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 2720.31s Find the Application 'com.ss.iphone.ugc.Ame' (retry 2) t = 2720.32s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 2780.33s Collecting extra data to assist test failure triage t = 2780.33s Requesting snapshot of accessibility hierarchy for app with pid 509 t = 2840.34s Requesting snapshot of accessibility hierarchy for app with pid 509 2024-08-19 14:34:26.806686+0700 WebDriverAgentRunner-Runner[489:97809] Issue type: 0 2024-08-19 14:34:26.806828+0700 WebDriverAgentRunner-Runner[489:97809] Enqueue Failure: Failed to get matching snapshot: XCTPerformOnMainRunLoop work timed out after 60.0s ((null)) (null) 0 0 2024-08-19 14:34:26.808114+0700 WebDriverAgentRunner-Runner[489:97809] Issue type: 0 2024-08-19 14:34:26.808205+0700 WebDriverAgentRunner-Runner[489:97809] Enqueue Failure: No element snapshot found for Application 'com.ss.iphone.ugc.Ame'[0.00, 0.00] -> (200.0, 259.0) ((null)) (null) 0 0 2024-08-19 14:34:26.809241+0700 WebDriverAgentRunner-Runner[489:97809] *** Assertion failure in -[XCPointerEventPath initForTouchAtPoint:offset:], XCSynthesizedEventRecord.m:263
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Deadlock in UIKit while injecting test bundle
Platform and Version iOS Development environment: Xcode 16.0 beta 5 (16A5221g), macOS 14.6.1 (23G93) Run-time configuration: iOS 18.0 beta 5 (22A5326g) Description of Problem Starting with iOS 18 SDK, test bundles containing a +load method that accesses UIScreen.mainScreen result in deadlock during test bundle injection. Also filed as FB14703057 I'm looking for clarity on whether this behavior is considered a bug in iOS or whether we will need to change the implementation of our app. Steps to Reproduce Create a new iOS app project using Objective-C and including unit tests Add the following code snippet to any .m file in the test target: @interface Foo: NSObject @end @implementation Foo + (void)load { UIScreen * const mainScreen = UIScreen.mainScreen; NSLog(@"%@", mainScreen); } @end Run the tests Expected Behavior As with iOS 17 & Xcode 15, the tests run to completion. Actual Behavior With iOS 18 & Xcode 16, deadlock during test bundle injection. stack_trace.txt
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How to get specific metric object from MetricKit using measure(metrics: metrics) results on XCUITest?
let metrics: [XCTMetric] = [XCTClockMetric(), // to measure time XCTCPUMetric(), // to measure cpu cycles XCTStorageMetric(), // to measure storage consuming XCTMemoryMetric(), ] let measureOptions = XCTMeasureOptions.default measureOptions.iterationCount = 1 measure(metrics: metrics) { //App flow } I want to get values of XCTCPUMetric, XCTMemoryMetric, XCTStorageMetric etc in any variable so that if want to send it further somewhere I can do it. Example - // let cpuMetric = CPU measure object should be here & I can get each information from this object. // let MemoryMetric = Memory measure object should be here & I can get each information from this object. But It's not available in XCUITest. We can only able to find it in the TestResult file. Please suggest any code available to get each metric object & value in the XCUITest rather than the test result.
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How specific metric object from measure(metrics: metrics) results on XCUITest using MetrixKit?
` let metrics: [XCTMetric] = [XCTClockMetric(), // to measure time XCTCPUMetric(), // to measure cpu cycles XCTStorageMetric(), // to measure storage consuming XCTMemoryMetric(), ] let measureOptions = XCTMeasureOptions.default measureOptions.iterationCount = 1 measure(metrics: metrics) { //App flow } ` I want to get values of XCTCPUMetric, XCTMemoryMetric, XCTStorageMetric etc in any variable so that if want to send it further somewhere I can do it. Example - // let cpuMetric = CPU measure object should be here & I can get each information from this object. // let MemoryMetric = Memory measure object should be here & I can get each information from this object. But It's not available in XCUITest. We can only able t find it in the TestResult file. Please suggest any code available to get each metric object & value in the XCUITest rather than the test result.
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XCode Cloud Aborting after 2 hours
Hi all, I have a UI Automation Test suite with a large number of test cases, that typically takes me 7 hours to run. When I setup the workflow on XCode cloud, I received the following error - "Build has exceeded the maximum allotted time. Each build can run for up to 120 minutes. If a build has not yet finished at this time, all incomplete actions will be cancelled." Is there any way to extend the build time? What is a build? I have two actions in my workflow. Build Action (that took 3 minutes) and the test step that took 2 hour 4 minutes. Am not clear how the 120 minute window is calculated.
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Forcing right to left text direction in Xcode UI test prevents sliders from moving
I'm using the following code to launch a UI test that forces a specific app language and moves a slider. I noticed that when forcing right to left text direction (for Arabic or Hebrew), during the UI test the slider doesn't move. The app content: struct ContentView: View { @State private var slider = 0.0 var body: some View { Slider(value: $slider, in: 0.0...1.0) } } The UI test: final class problemUITests: XCTestCase { func testExample() throws { let app = XCUIApplication() let locale = Locale(identifier: "ar") app.launchArguments += ["-AppleLanguages", "(ar)", "-AppleLocale", "ar"] if locale.language.characterDirection == .rightToLeft { app.launchArguments += ["-NSForceRightToLeftWritingDirection", "YES", "-AppleTextDirection", "YES"] } app.launch() app.sliders.element.adjust(toNormalizedSliderPosition: 0.3) } } Am I missing something or is there a workaround?
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Jul ’24
Simulate hardware keyboard button press in Xcode UI test for iPad
XCUIElement has two methods named typeKey(_:modifierFlags:): the first one takes a String as an argument, the second one a XCUIKeyboardKey, which has constants like .downArrow. Now, even if the documentation says that both methods are "Available in macOS and in iPadOS 15 and later", when compiling the UI tests for iOS, the following line app.typeKey(.downArrow, modifierFlags: []) produces a compiler error Type 'String' has no member 'downArrow' Am I missing something or is there a workaround?
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Jul ’24
UI Tests with mock server
I'm using Xcode Cloud for release builds and unit tests, and it works fine. Recently, I added some XCUITests, but to run it the way I need I started to use this mock server. Basically, the idea is you define before each test what responses you want to get for specific requests. It works like a charm locally. But if I want to run it in Xcode Cloud, it looks like the server has failed to launch. The mock server is a separately launched binary file. I think this is because this permission I get when launch it locally. So, my question is how to allow this kind of permission in Xcode Cloud to make my UITests works correctly? You can find a detailed instruction how server is launched on a github page I provided.
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Xcode UI test cannot tap menu button in form
Apparently UI tests are unable to tap menu buttons but can tap regular buttons inside forms. Earlier today I was able to see in the Simulator that the UI test tries to tap the button by tapping the center of the containing form row, which works for regular buttons, but not for menu buttons. In fact, when trying in the SwiftUI preview in Xcode it seems that menu buttons have to be tapped exactly on top of them, while regular buttons can be tapped anywhere in the form row. (Now I’m not able to see touches performed by the UI test anymore in the Simulator for an unknown reason, even though I have “Show single touches” enabled in the Simulator settings.) How can I open a menu button in a UI test? The UI code: struct ContentView: View { @State private var label1 = "Menu 1" @State private var label2 = "Menu 2" var body: some View { NavigationStack { Form { LabeledContent("Menu 1") { Button(label1) { label1 = "Menu 1 tapped" } .accessibilityIdentifier("menu1") } LabeledContent("Menu 2") { Menu(label2) { Button("Button") { } .accessibilityIdentifier("button") } .accessibilityIdentifier("menu2") } } } } } #Preview { ContentView() } And the test: final class problemUITests: XCTestCase { func testExample() throws { // UI tests must launch the application that they test. let app = XCUIApplication() app.launch() app.collectionViews.element(boundBy: 0).buttons["menu1"].tap() app.collectionViews.element(boundBy: 0).buttons["menu2"].tap() app.collectionViews.element(boundBy: 0).buttons["button"].tap() } }
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How do I do unit tests for code using system objects?
That's probably a bad title, let's try with specifics: we have a network extension, it has some classes / functions of its own, and they, when push comes to build, depend on (for example) NEAppProxyFlow and its subclasses. The code is written in Swift, since it is the language of the future. If I want to do a unit test for my code, I need to provide something that at least looks like NEAppProxyFlow, since I can't otherwise create one. I thought I could provide my own NetworkExtension module for test case, but that... did not work well, and I still don't understand why. On the other hand, I'm really bad at making unit tests, so the odds that I'm missing something fairly obvious to most other people are pretty high.
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Jul ’24
Developing and deploying iPhone test code in Windows environment
Hello, I am developing Java test code to test a web application on an Android and iPhone platforms using Selenium and Appium inside Eclipse IDE. Android device could be tested just fine. When it comes to instantiation of iOSDriver Object for running test script on an iPhone, the run time is complaining that it needs Xcode libraries, or Xcode tool on the class path. This makes it necessary to use a mac system for coding and install Xcode on it. Once I use a mac and develop the test code within my Eclipse, can I deploy the code on a Windows Server? Does the code would not need Xcode during run time or just the Selenium-java client libraries and Appium alone? Thanks a lot, -- Prasad Nutalapati
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Jul ’24
How to handle “Try Again” alert in biometrics UI testing?
I’m writing UI tests for biometrics in iOS. For a failing case, I encounter an alert that needs to be dismissed by the user. How can I tap a button in this alert? XCTest has the addUIInterruptionMonitor method (https://developer.apple.com/documentation/xctest/xctestcase/1496273-adduiinterruptionmonitor). Is this what I need? If so, what description should I use? Or do I need some other functionality? For Touch ID, I can simply simulate a failure twice, and the alert will be dismissed. However, for Face ID and Optic ID, this approach is not suitable—the alert buttons need to be tapped. Additionally, there is an old method to handle the alert using the Springboard app (with the bundle ID “com.apple.springboard”). However, this only works for iOS and iPadOS, while VisionOS does not have this bundle ID.
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Jul ’24
What app provides system alerts in VisionOS? iOS and iPadOS has springboard app, but VisionOS doesn't
I want to automate tests for my iOS app and start writing UITests. Sometimes system alerts appear, and my tests have to simulate button tapping. In iOS and iPadOS these alerts are available via the system Springboard application: let springboard = XCUIApplication(bundleIdentifier: "com.apple.springboard") let cancelButton = springboard.alerts.buttons["Cancel"].firstMatch if cancelButton.exists { cancelButton.tap() // <-- cancel button taps, and test continue working } But when I launch my test in the Vision Pro simulator, the springboard is not available: let springboard = XCUIApplication(bundleIdentifier: "com.apple.springboard") print(springboard.exists) // <-- "false" will be printed, springboard does not exist It means that I can't automate button tapping in system alerts. So, my question is: How can I access system alerts in VisionOS and tap buttons by UITests?
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Jul ’24