public void testHorizontalMouseWheelMovement() throws Exception {
    panel.addVerticalScrollBar();
    panel.getVerticalScrollbar().configure(100, 200);
    panel.addHorizontalScrollBar();
    panel.getHorizontalScrollbar().configure(100, 200);

    int modifer = 1;
    int scrollAmount = 8;
    int wheelRotation = 2;
    MouseWheelEvent e =
        new MouseWheelEvent(
            root.getContentPane(), 1, 2, modifer, 4, 5, 6, false, 7, scrollAmount, wheelRotation);

    panel.mouseWheelMoved(e);

    assertEquals(0, panel.getVerticalScrollbar().getScrollBar().getValue());
    assertEquals(16, panel.getHorizontalScrollbar().getScrollBar().getValue());
  }