### Question:
FusedLocationServiceCallbackManager { void onLocationAvailabilityChanged(LocationAvailability locationAvailability, ClientManager clientManager) { clientManager.notifyLocationAvailability(locationAvailability); }    }### Answer:
@Test public void onLocationAvailabilityChanged_shouldNotifyLocationAvailability() { LostClientManager clientManager = mock(LostClientManager.class); LocationAvailability locationAvailability = mock(LocationAvailability.class); callbackManager.onLocationAvailabilityChanged(locationAvailability, clientManager); verify(clientManager).notifyLocationAvailability(locationAvailability); }