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()); }