public void testHoverOnWithoutHoverStyle() throws Exception {
    MouseEvent event = new MouseEvent(new JPanel(), 1, 2, 3, 4, 5, 6, false);
    prop.hoverStyle = null;

    panel.mouseEntered(event);

    assertEquals(Cursor.DEFAULT_CURSOR, root.getContentPane().getCursor().getType());
    assertEquals(null, style.getScreen());
  }