Android Espresso : correctly test closing app with pressBack

Question

I\'m trying to implement some navigation tests with espresso. Actually i want to check if the application has been closed by the use of the Back key on the main screen, just

Answer 1

Short answer:

Use Espresso.pressBackUnconditionally().

I've checked for version 3.1.1

Example:

Espresso.pressBackUnconditionally()
assertTrue(activityRule.activity.isDestroyed)

Explonation:

As you can see in Expresso source code it passes false flag to PressBackAction, so that it doesn't throw exception.