AddLinkHeaderListener example

/** * @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 = [
            '<https://demo.api-platform.com/docs.jsonld>; rel="http://www.w3.org/ns/hydra/core#apiDocumentation"',
            '</foo>; rel="preload"',
        ];