I've been trying to run a UI test via Visual Studio Mobile center for a while now, but I'm getting the following error:
Preparing tests... failed. Error: Cannot prepare UI Test artifacts. Returning exit code 20.
I looked on the mobile-center-cli github page and found that error codes 1 until 63 are reserved for TestCloud. There is really no documentation about this error so I hope someone is able to point me into the right direction.
Command used:
mobile-center test run uitest --app "MyAppName" --devices d5c95903 --app-path "pathToApk" --test-series "master" --locale "en_US" --build-dir "PathToBinRelease"
It sounds like you may be specifying the wrong folder for your --build-dir.
The --build-dir should be the bin/Debug folder of your Xamarin.UITest project, something like this:
"/Users/User/AppSolution/App.UITests/bin/Debug"
Can you please try the above and let me know if it resolves the issue?
Glenn