Edited with answer...
It is possible to achieve this. In order to build an ipa of the UI Testing app bundle you can follow these steps:
- Open your project containing in Xcode.
- Select the device you'd like to build the ipa for next to the scheme. This can be an actual device or a simulator.
- Product > Build For > Testing
Find [your_ui_test_bundle_name].app file in Derived Data.
- Derived data by default is located at ~/Library/Developer/Xcode/DerivedData/
- To locate this file, dive into DerivedData for your project, navigating to Build > Products and then the respective directory based on what you chose in step 2. If you chose a simulator, look in -iphonesimulator/ or if you chose a device look in -iphoneos/. The UI test bundle .app file should be in that directory.
Create a directory named Payload case sensitive and it must be named this.
- Move the .app file into the Payload directory.
- Compress the Payload directory.
- Rename the compressed directory to have a file extension of .ipa. You'll be prompted and select Keep .ipa.
Now you have you UI test bundle application saved as an ipa. You can also upload this ipa to a device manually in Xcode via the following process (bonus info, yay!)
- Window > Devices and Simulators
- Select your connected device.
- Tap the + button under Installed Apps.
- Navigate to and select your UI test .ipa file that you compressed previously.
- It should install onto the device.
Credit where it is due: https://medium.com/ios-os-x-development/how-to-run-your-iphone-test-on-aws-device-farm-98f18086811e