Using Xcode7's UI tests to create app screenshots for the App Store

Question

Every time we change something in the UI, we have to manually prepare and take 375 (= 5 screenshots * 5 device types * 15 languages) screenshots for iTunes Connect's listing.

I'm trying to "exploit" iOS 9's new UI testing to automatically prepare and take these screenshots for each language. This should save a huge amount of time and provide a better experience to our users, because we didn't update the screenshots frequently due to the hard work involved.

I couldn't find much help on the internet, probably because this feature is too fresh. So here are two essential questions, hopefully we can find a way to make it happen.

1. Is it possible to save a screenshot to disk through the UI testing API?

2. Is it possible to have a clean install for a XCTestCase?

Answer 1

This isn't completely related to Xcode 7, but you can automate screenshot taking with snapshot.

Answer 2

Yes, you can create screenshots using the Xcode UI Testing.

• Create a custom scheme for your tests (optional but recommended).
• Use CLI(terminal) to run the tests. Something like this:

xcodebuild -workspace App.xcworkspace \
     -scheme "SchemeName" \
           -sdk iphonesimulator \
           -destination 'platform=iOS Simulator,name=iPhone 6,OS=9.0' 
           test

Once you are done with this, to generate screenshots, add the path to where you want the screenshots, like this:

xcodebuild -workspace App.xcworkspace \
 -scheme "SchemeName" \
       -sdk iphonesimulator \
       -destination 'platform=iOS Simulator,name=iPhone 6,OS=9.0'
       -derivedDataPath './output'
       test

./output will tell Xcode to take screenshots for every test. You can find this in detail here