ScrollerHelper { public boolean isFinished() { return mScroller.isFinished(); } ScrollerHelper(OverScroller overScroller); boolean startScroll(int start, int end); boolean startScroll(int start, int end, int duration); void finish(); boolean isFinished(); boolean computeScrollOffset(); int getCurrX();  }
@Test public void WhenIsFinished_forwardToOverScroll() { scrollerHelper.isFinished(); verify(overScroller).isFinished(); }