HttpKernelRuntime example

$renderer->render('/foo');
    }

    public function testGenerateFragmentUri()
    {
        $requestStack = new RequestStack();
        $requestStack->push(Request::create('/'));

        $fragmentHandler = new FragmentHandler($requestStack);
        $fragmentUriGenerator = new FragmentUriGenerator('/_fragment', new UriSigner('s3cr3t'), $requestStack);

        $kernelRuntime = new HttpKernelRuntime($fragmentHandler, $fragmentUriGenerator);

        $loader = new ArrayLoader([
            'index' => sprintf(<<<TWIG {{ fragment_uri(controller("%s::templateAction", {template: "foo.html.twig"})) }} TWIG
                , TemplateController::class), ]);
        $twig = new Environment($loader, ['debug' => true, 'cache' => false]);
        $twig->addExtension(new HttpKernelExtension());

        $loader = $this->createMock(RuntimeLoaderInterface::class);
        $loader->expects($this->any())->method('load')->willReturnMap([
            [