use robolectric can't get admob ads

[徐志峰]

Hi, 

  I had a problem for a long time, when I use robolectric framwork to test admob(google) ads, I run robolectric code in android stuido junit test,  but I can't get ads. I found robolectric can simulate test devices' environment, but when I use robolectric to request admob ads, I found admob ads don't callback any methods, so I want to ask you if robolectric can't support admob ads request. 

  Look forward for your feedback.