class TestContent

class TestContent extends ControllerBase {
    
    /**
     * The HTTP kernel.
     *
     * @var \Symfony\Component\HttpKernel\HttpKernelInterface
     */
    protected $httpKernel;
    
    /**
     * Constructs a TestContent instance.
     */
    public function __construct(HttpKernelInterface $http_kernel) {
        $this->httpKernel = $http_kernel;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('http_kernel'));
    }
    
    /**
     * Provides example content for testing route enhancers.
     */
    public function test1() {
        return [
            '#markup' => 'abcde',
        ];
    }
    
    /**
     * Provides example content for route specific authentication.
     *
     * @return string
     *   The user name of the current logged in user.
     */
    public function test11() {
        $account = $this->currentUser();
        return [
            '#markup' => $account->getAccountName(),
        ];
    }
    public function testAccount(UserInterface $user) {
        $current_user_name = $this->currentUser()
            ->getAccountName();
        $this->currentUser()
            ->setAccount($user);
        return [
            '#markup' => $current_user_name . ':' . $user->getAccountName(),
        ];
    }
    
    /**
     * Uses a subrequest to determine the content.
     */
    public function subrequestTest(UserInterface $user) {
        $request = \Drupal::request();
        $request = Request::create('/router_test/test13/' . $user->id(), 'GET', $request->query
            ->all(), $request->cookies
            ->all(), [], $request->server
            ->all());
        return $this->httpKernel
            ->handle($request, HttpKernelInterface::SUB_REQUEST);
    }

}