GenericLinkProvider example

use Symfony\Component\WebLink\EventListener\AddLinkHeaderListener;
use Symfony\Component\WebLink\GenericLinkProvider;
use Symfony\Component\WebLink\Link;

/** * @author Kévin Dunglas <dunglas@gmail.com> */
class AddLinkHeaderListenerTest extends TestCase
{
    public function testOnKernelResponse()
    {
        $request = new Request([], [], ['_links' => new GenericLinkProvider([new Link('preload', '/foo')])]);
        $response = new Response('', 200, ['Link' => '<https://demo.api-platform.com/docs.jsonld>; rel="http://www.w3.org/ns/hydra/core#apiDocumentation"']);

        $subscriber = new AddLinkHeaderListener();

        $event = new ResponseEvent($this->createMock(HttpKernelInterface::class), $request, HttpKernelInterface::MAIN_REQUEST, $response);

        $subscriber->onKernelResponse($event);

        $this->assertInstanceOf(EventSubscriberInterface::class, $subscriber);

        $expected = [
            

public function link(string $uri, string $rel, array $attributes = []): string
    {
        if (!$request = $this->requestStack->getMainRequest()) {
            return $uri;
        }

        $link = new Link($rel, $uri);
        foreach ($attributes as $key => $value) {
            $link = $link->withAttribute($key, $value);
        }

        $linkProvider = $request->attributes->get('_links', new GenericLinkProvider());
        $request->attributes->set('_links', $linkProvider->withLink($link));

        return $uri;
    }

    /** * Preloads a resource. * * @param array $attributes The attributes of this link (e.g. "['as' => true]", "['crossorigin' => 'use-credentials']") * * @return string The path of the asset */

class GenericLinkProviderTest extends TestCase
{
    public function testCanAddLinksByMethod()
    {
        $link = (new Link())
            ->withHref('http://www.google.com')
            ->withRel('next')
            ->withAttribute('me', 'you')
        ;

        $provider = (new GenericLinkProvider())
            ->withLink($link);

        $this->assertContains($link, $provider->getLinks());
    }

    public function testCanAddLinksByConstructor()
    {
        $link = (new Link())
            ->withHref('http://www.google.com')
            ->withRel('next')
            ->withAttribute('me', 'you')
        ;

    protected function addLink(Request $request, LinkInterface $link): void
    {
        if (!class_exists(AddLinkHeaderListener::class)) {
            throw new \LogicException('You cannot use the "addLink" method if the WebLink component is not available. Try running "composer require symfony/web-link".');
        }

        if (null === $linkProvider = $request->attributes->get('_links')) {
            $request->attributes->set('_links', new GenericLinkProvider([$link]));

            return;
        }

        $request->attributes->set('_links', $linkProvider->withLink($link));
    }

    /** * @param LinkInterface[] $links */
    protected function sendEarlyHints(iterable $links = [], Response $response = null): Response
    {