shadows/framework/src/main/java/org/robolectric/shadows/ShadowApplication.java
public void checkActivities(boolean checkActivities) {
    ActivityThread activityThread = (ActivityThread) RuntimeEnvironment.getActivityThread();
    ShadowInstrumentation shadowInstrumentation =
        Shadow.extract(activityThread.getInstrumentation());
    shadowInstrumentation.checkActivities(checkActivities);
  }
public void checkActivities(boolean checkActivities) {
    ActivityThread activityThread = (ActivityThread) RuntimeEnvironment.getActivityThread();
    ShadowInstrumentation shadowInstrumentation =
        Shadow.extract(activityThread.getInstrumentation());
    shadowInstrumentation.checkActivities(checkActivities);
  }
Set to true if you'd like Robolectric to strictly simulate the real Android behavior when
calling {@link Context#startActivity(android.content.Intent)}. Real Android throws a
{@link android.content.ActivityNotFoundException} if given
an {@link Intent} that is not known to the {@link android.content.pm.PackageManager}

By default, this behavior is off (false).

@param checkActivities True to validate activities.