How to detect if iOS app is running in UI Testing mode

Question

I would like my app to run special code (e.g. resetting its state) when running in UI Testing mode. I looked at environment variables that are set when the app is running fr

Answer 1

My solution is almost identical to that of Ciryon above, except that for my macOS Document-based app I had to prepend a hyphen to the argument name:

let app = XCUIApplication()
app.launchArguments.append("-Testing")
app.launch() 

...otherwise, "Testing" ends up interpreted as the name of the document to open when launching the app, so I was getting an error alert: