Is it possible to automatically test user keyboard / Android interfaces?

I would like to create a test (similar to a robotium / selenium test) to check the location of my keyboard in different configurations.

Since the keyboard works as a service, the robot cannot directly test it. Instead, I created an activity in the service to test the keyboard. The keyboard is launched in a separate window, so robotism does not see it.

My question is: is there an environment capable of testing input methods?