Can I run several iOS UI Tests in Parallel?

Question

I'm working on building a UI Test suite for my iOS app. I need to test my app's functionality on several different devices, but right now I have to select the simulator I want, run the tests, and then repeat.

Now that Xcode supports multiple simulators running in parallel, is there a way to run the UI tests across several different device simulators at the same time?

Merovingian

Have you checked github.com/linkedin/bluepill ? – Bernita

I was able to this by following this guide: medium.com/@t.camin/parallelizing-ui-tests-28c16000f141. – Job

Answer 1

Run the following command in the same directory as your project to run your tests in parallel from the command line:

xcodebuild test -scheme "YourSchemeName" -destination 'platform=iOS Simulator,OS=11.2,name=iPhone 8' -destination 'platform=iOS Simulator,OS=11.2,name=iPhone 6s'  -configuration "Debug" ENABLE_TESTABILITY=YES SWIFT_VERSION=4.0 ONLY_ACTIVE_ARCH=YES

You can add -destination 'platform=iOS Simulator,OS=11.2,name=iPhone 8' for a different destination for as many different destinations as you would like.

For a list of simulator names and OSs that are available, run the command:

instruments -s devices

Bear in mind that if you are running tests in the simulator, you will not see the simulators on your screen when running tests through the command line.

Copperhead

For Xcode 13 and later, use xctrace list devices instead. (instruments has been removed.) – Sanguinaria

Answer 2

In Xcode:

1. Select your target scheme in Xcode, and "Edit Scheme..."
2. Find the settings for "Test", and press on the "Info" tab
3. You'll see a list of your Unit and UI tests, press on the associated "Options..." button
4. Select "Execute in parallel on Simulator"
5. Optionally select "Randomize execution order"

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Commandline:

Look at this answer here

Functional