[GTALUG] Testing Android app on real phone

Hi, I have question about testing or controlling Android app on a real cell phone.  How would you test "user interaction" of Android app, that you didn't build and don't have access to code? Eg. Calculator app.  As user, you would press on screen,     2 + 3 = and you get     5 on the screen. So, how would you duplicate this user interaction, without actually pressing the screen buttons? What *keywords* should I search online? On Windows, there is TeamViewer that you can click and type remotely.  I did use it manually, but never via scripts or macros. On Linux, there is VNC macro which duplicates key press and mouse click.  I did use it, long long ago.