public function testShowSubMenu()
{
$mainMenu = $this->getMockBuilder(CliMenu::class)->disableOriginalConstructor()->getMock();
$subMenu = $this->getMockBuilder(CliMenu::class)->disableOriginalConstructor()->getMock();
$mainMenu->expects($this->once())->method('closeThis');
$subMenu->expects($this->once())->method('open');
$item = new MenuMenuItem('Item', $subMenu);
$item->showSubMenu($mainMenu);
}
