I am using Xcode 11.3.1 and see that the quick actions are available in the simulator. Is there a way to test these using XCUITest? How can we launch the application and select one of these quick actions?
The bundle ID for the springboard is com.apple.springboard. You can interact with it as you would any other application.
let springboard = XCUIApplication(bundleIdentifier: "com.apple.springboard")
and then go from there. To discover its capabilities, enter a debug session and have at it.