I want to test that when I receive push, Notification will be showing up. And it might be as well to check its properties (like title, set intent and so on.)
How can
Espresso UI test framework doesn't see more than actual View. I doubt seriously that you can check any notification with Espresso.
For this purpose use another Googles testing framework uiautomator
, which is described as:
UI Automator is a UI testing framework suitable for cross-app functional UI testing across system and installed apps.
Here you would find how to use it with Espresso: http://qathread.blogspot.com/2015/05/espresso-uiautomator-perfect-tandem.html
More information:Visit also: Android Testing: UIAutomator vs Espresso