Bolt\Tests\Twig\AdminHandlerTest::testStackable PHP Method

    public function testStackable()
    {
        $app = $this->getApp();
        $stack = $this->getMockStack();
        $stack->expects($this->once())->method('isStackable');
        $app['stack'] = $stack;
        $handler = new AdminHandler($app);
        $handler->testStackable('koala.jpg');
    }