public function testStack()
{
$app = $this->getApp();
$stack = $this->getMockStack();
$stack->expects($this->exactly(3))->method('getList')->withConsecutive([['other', 'document']], [['other', 'document']], [[]]);
$app['stack'] = $stack;
$handler = new AdminHandler($app);
$handler->stack(['other', 'document']);
$handler->stack('other, document');
$handler->stack('');
}