Issue #3109971 by andypost, znerol: Use $this->request in...

  /**

   * Figures out what the exposed input for this view is.

   *

   * They will be taken from \Drupal::request()->query or from

   * They will be taken from $this->request->query or from

   * something previously set on the view.

   *

   * @return string[]

   * @see self::setExposedInput()

   */

  public function getExposedInput() {

    // Fill our input either from \Drupal::request()->query or from something

    // Fill our input either from $this->request->query or from something

    // previously set on the view.

    if (empty($this->exposed_input)) {

      // Ensure that we can call the method at any point in time.

      $this->initDisplay();

      $this->exposed_input = \Drupal::request()->query->all();

      $this->exposed_input = $this->request->query->all();

      // unset items that are definitely not our input:

      foreach (['page', 'q'] as $key) {

        if (isset($this->exposed_input[$key])) {

      // If we have no input at all, check for remembered input via session.

      if (empty($this->exposed_input) && $this->request->hasSession()) {

        $session = \Drupal::request()->getSession();

        $session = $this->request->getSession();

        // If filters are not overridden, store the 'remember' settings on the

        // default display. If they are, store them on this display. This way,

        // multiple displays in the same view can share the same filters and

use Prophecy\Argument;

use Psr\Log\LoggerInterface;

use Symfony\Component\HttpFoundation\Request;

use Symfony\Component\HttpFoundation\RequestStack;

use Symfony\Component\HttpFoundation\Session\Session;

use Symfony\Component\HttpFoundation\Session\Storage\MockArraySessionStorage;

      MainContentViewSubscriber::WRAPPER_FORMAT => 1,

    ]);

    $request->setSession(new Session(new MockArraySessionStorage()));

    $request_stack = new RequestStack();

    $request_stack->push($request);

    $this->container->set('request_stack', $request_stack);

    $view->setRequest($request);

    $view->destroy();

    $view->setDisplay('page_1');

    $view->setCurrentPage(2);