Appium XCUITest Driver Real Device Setup

Installing dependencies

Appium iOS real device support depends on a central third-party software suite, libimobiledevice, which is easily installable with Homebrew:

brew install libimobiledevice

In addition to the dependency on libimobiledevice, Appium support for real devices running iOS 9.3 and above using Xcode 8+ also depends on ios-deploy, which is easily available through npm or Homebrew:

npm install -g ios-deploy

brew install ios-deploy

(For hybrid or web tests, you will also need to follow the ios-webkit-debug-proxy setup instructions)

The way that the XCUITest driver works is via the installation of a helper application called WebDriverAgent-Runner onto the device, through which the application under test is automated. While this is simple in theory, the hoops of code signing and provisioning applications for development and testing can make this a bit of a headache.

Basic (automatic) configuration

The easiest way to get up-and-running with Appium's XCUITest support on iOS real devices is to use the automatic configuration strategy. There are two ways to do this:

    {
      "xcodeOrgId": "<Team ID>",
      "xcodeSigningId": "iPhone Developer"
    }

    DEVELOPMENT_TEAM = <Team ID>
    CODE_SIGN_IDENTITY = iPhone Developer

In either case, the Team ID is a unique 10-character string generated by Apple that is assigned to your team. You can find your Team ID using your developer account. Sign in to developer.apple.com/account, and click Membership in the sidebar. Your Team ID appears in the Membership Information section under the team name. You can also find your team ID listed under the "Organizational Unit" field in your iPhone Developer certificate in your keychain.

Note that these are mutually exclusive strategies; use either the xcodeConfigFile capability or the combination of xcodeOrgId and xcodeSigningId.

Once this configuration is done, it should just be a matter of starting your test specifying a real device in your udid desired capability.

If this has not worked it will usually manifest itself in the Appium server logs as some error followed by info XCUITest xcodebuild exited with code '65' and signal 'null'. This usually means that the necessary code signing is not set up correctly. Go on to the Basic (manual) configuration to fix.

If the WebDriverAgentRunner is successfully installed on the device, but in the Appium logs there is an error message something like:

2017-01-24 09:02:18.358 xcodebuild[30385:339674] Error Domain=com.apple.platform.iphoneos Code=-12 "Unable to launch com.apple.test.WebDriverAgentRunner-Runner" UserInfo={NSLocalizedDescription=Unable to launch com.apple.test.WebDriverAgentRunner-Runner, NSUnderlyingError=0x7fa839cadc60 {Error Domain=DTXMessage Code=1 "(null)" UserInfo={DTXExceptionKey=The operation couldn’t be completed. Unable to launch com.apple.test.WebDriverAgentRunner-Runner because it has an invalid code signature, inadequate entitlements or its profile has not been explicitly trusted by the user. : Failed to launch process with bundle identifier 'com.apple.test.WebDriverAgentRunner-Runner'}}}
2017-01-24 09:02:18.358 xcodebuild[30385:339674] Error Domain=IDETestOperationsObserverErrorDomain Code=5 "Early unexpected exit, operation never finished bootstrapping - no restart will be attempted" UserInfo={NSLocalizedDescription=Early unexpected exit, operation never finished bootstrapping - no restart will be attempted}

Testing failed:
    Test target WebDriverAgentRunner encountered an error (Early unexpected exit, operation never finished bootstrapping - no restart will be attempted)

The problem is that the developer is not trusted on the device. If you manually try to run the WebDriverAgentRunner app on the device, you will see a popup message:

Untrusted developer

You can go to Settings => General => Device Management on the device to trust the developer and allow the WebDriverAgentRunner app to be run (see Apple documentation for more information).

Basic (manual) configuration

There are many cases in which the basic automatic configuration is not enough. This usually has to do with code signing and the configuration of the project to be able to be run on the real device under test. Often this happens when the development account being used is a "Free" one, in which case it is not possible to create a wildcard provisioning profile, and will often not create one for the default application bundle.

This will manifest as something like an error that Xcode failed to create provisioning profile:

No provisioning profile

The easiest way around this is to create a provisioning profile by opening Xcode and creating a new project:

Create new project

The type does not matter, other than it being "iOS". "Single View Application" is the easiest:

Create single page

The important part is to use a unique "Product Name" and "Organization Name". Also, at this point, specify your "Team".

Setup bundle

You can confirm that the provisioning profile was created by looking at the "Project" tab:

Project pane

Or by going into your account preferences and seeing the provisioning profile:

Check provisioning profile

At this point you have a valid provisioning profile. Make note of the bundle id you associated with it, and add that in the updatedWDABundleId desired capability for your tests. Then follow the initial instructions for automatic configuration.

Full manual configuration

Alternatively, the provisioning profile can be manually associated with the project (keep in mind that this will have to be done each time the WebDriverAgent is updated, which includes every time a new version of Appium is installed, and is not recommended):

    $ which appium
    /path/where/installed/bin/appium

    mkdir -p Resources/WebDriverAgent.bundle
    ./Scripts/bootstrap.sh -d

    xcodebuild -project WebDriverAgent.xcodeproj -scheme WebDriverAgentRunner -destination 'id=<udid>' test

If this was successful, the output should end with something like:

    Test Suite 'All tests' started at 2017-01-23 15:49:12.585
    Test Suite 'WebDriverAgentRunner.xctest' started at 2017-01-23 15:49:12.586
    Test Suite 'UITestingUITests' started at 2017-01-23 15:49:12.587
    Test Case '-[UITestingUITests testRunner]' started.
        t =     0.00s     Start Test at 2017-01-23 15:49:12.588
        t =     0.00s     Set Up

    export DEVICE_URL='http://<device IP>:8100'
    export JSON_HEADER='-H "Content-Type: application/json;charset=UTF-8, accept: application/json"'
    curl -X GET $JSON_HEADER $DEVICE_URL/status

You ought to get back output something like this:

    {
      "value" : {
        "state" : "success",
        "os" : {
          "name" : "iOS",
          "version" : "10.2"
        },
        "ios" : {
          "simulatorVersion" : "10.2",
          "ip" : "192.168.0.7"
        },
        "build" : {
          "time" : "Jan 23 2017 14:59:57"
        }
      },
      "sessionId" : "8951A6DD-F3AD-410E-A5DB-D042F42F68A7",
      "status" : 0
    }

Configuring the app under test

Not only does WebDriverAgent need to be configured to run on your device, but your app must also be able to run on your device. The central requirements are the same: to have a build of your app (an .ipa file) signed with a development provisioning profile. A good overview of the process can be found here and here.

In a little more detail, to get started on a real device, you will need the following:

Appium handles installing the application to the device, using ideviceinstaller (which is installed as part of libimobiledevice), but it is sometimes easier to pre-install your app using Xcode to ensure there are no problems (see again the Apple documentation for this).

Troubleshooting ideas

  1. Make sure UDID is correct by checking it in Xcode Organizer or iTunes. It is a long string (20+ chars).
  2. Make sure that you can run your tests against the Simulator.
  3. Make sure UI Automation is enabled on your device. Settings -> Developer -> Enable UI Automation