I have a XCUITest that requires the app to be put in the background. My understanding was that when pressing the home button the app would be put into the background, which I have coded as such:
XCUIDevice.shared.press(.home)
sleep(2)
XCTAssertEqual(app.state, .runningForeground)
However, as the assertion states, the app is seemingly running in the foreground. Is this an incorrect implementation on my part?
iOS Apps do not go to the background immediately – they have time to save data in case the app will be terminated in future. https://developer.apple.com/documentation/uikit/app_and_environment/managing_your_app_s_life_cycle https://developer.apple.com/documentation/uikit/app_and_environment/scenes/preparing_your_ui_to_run_in_the_background
Furthermore .state returns the results asynchronously. Read more in Discussion
https://developer.apple.com/documentation/xctest/xcuiapplication/2877401-state
That's the reason you should use wait function as you did in your own answer
https://developer.apple.com/documentation/xctest/xcuiapplication
https://developer.apple.com/documentation/xctest/xcuiapplication/2921487-wait